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Marantz Stereo 70s Slimline stereo receiver with built-in Wi-Fi®, Bluetooth®, Apple® AirPlay® 2, HDMI, and HEOS Built-in

Item # 642STR70SB

A compact, two-channel receiver with classic Marantz sound for all your sources.

A compact, two-channel receiver with classic Marantz sound for all your sources.

Item # 642STR70SB

In stock
C$1,299.00

About the Marantz Stereo 70s

Athena H.

Many options packed into one slim receiver

It's always exciting when Marantz releases new receivers, and this slimline stereo model is no exception. It's got a little something for everyone in a tidy, space-saving form-factor — like high-resolution audio playback from a USB thumb drive, optical and coaxial inputs for your high-performance streamer or CD player, and a phono input for vinyl afficionados. And with the receiver's built-in HEOS streaming platform, you can explore streaming music sources to rediscover old favourites or to delve into new genres.

Many options packed into one slim receiver

It's always exciting when Marantz releases new receivers, and this slimline stereo model is no exception. It's got a little something for everyone in a tidy, space-saving form-factor — like high-resolution audio playback from a USB thumb drive, optical and coaxial inputs for your high-performance streamer or CD player, and a phono input for vinyl afficionados. And with the receiver's built-in HEOS streaming platform, you can explore streaming music sources to rediscover old favourites or to delve into new genres.

Add TV and gaming sound to your setup

The Stereo 70s features six 4K/60Hz HDMI inputs (three that are 8K and 4K/120Hz compatible) and one 4K/8K ARC HDMI output, so you can use it as the hub of a sweet two-channel audio/video setup. Plug in a game console, Apple TV or Roku, and a Blu-ray player in your living room or den, hook up your favourite pair of stereo speakers, and suddenly you've got waay better sound than your TV's built-in speakers could ever give you.

Stream your music with HEOS

Built-in HEOS technology lets you easily play a wide range of digital music — from your personal library, internet radio stations, and popular streaming services like Pandora®, Spotify®, and TIDAL. Apple AirPlay 2 means you can stream audio directly from your iPhone®, iPad®, or Mac® computer. That includes soundtracks from YouTube™ videos and Netflix movies. It will also show up in your player list if you're using Roon (subscription required).

And this receiver can be easily integrated into a wireless multi-room audio system. Stream music to HEOS wireless speakers and components in different rooms, and control each room's sound independently with the free HEOS app. The app lets you control playback, browse music sources, and select which rooms you want to use. Play the same music throughout your home, or listen to something different in each room.

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Product highlights:

  • 2-channel amplifier
  • 75 watts per channel into 8 ohms (20-20,000 Hz) at 0.08% THD
  • 100 watts per channel into 6 ohms (1 kHz) at 0.7% THD
Digital and streaming music options:
  • built-in Wi-Fi for listening to music from a networked PC, free internet radio, and music services
  • built-in HEOS technology wirelessly connects compatible HEOS components for whole home audio
    • includes support for Pandora®, SiriusXM, and Spotify® (subscription required for some services)
    • free HEOS app offers easy Wi-Fi control, settings adjustments, and music selection and playback
    • works with Amazon Alexa and Google Assistant voice controllers
  • Apple AirPlay 2 lets you stream directly from an iPhone® or iPad® and ask Siri to play Apple Music
    • supports multi-room audio with compatible wireless speakers
  • built-in Bluetooth for wireless music listening with smartphones, tablets, and compatible computers
  • Bluetooth transmission for sending audio from the receiver to Bluetooth-enabled headphones
    • play audio through Bluetooth headphones only, or through Bluetooth headphones and connected speakers simultaneously
  • plays high-resolution digital music files via USB storage device or a networked computer (PCM up to 24-bit/192kHz resolution; DSD up to 5.6 MHz)
  • works as a Roon player (requires subscription and Roon Core running on your network)
    • Roon Core is media server software that runs on your computer, NAS drive, or other compatible hardware
Multi-room audio:
  • stereo RCA line-level audio output for 2nd zone
    • HDMI inputs can only be played in Zone 2 if also selected for main listening room
HDMI features:
  • HDMI 2.1 audio/video switching: 6 in, 1 out
    • 3 inputs and 1 output support 8K/60Hz and 4K/120Hz video
    • all inputs and outputs support 4K/60Hz video
    • HDCP 2.3 technology ensures compatibility with 4K Ultra HD sources and TVs
    • supports HDR10, HDR10+, Dolby Vision®, HLG, and Dynamic HDR
    • supports ARC (Audio Return Channel) for passing audio signals to the receiver from your TV
    • Dolby Digital and DTS surround not supported; TV must be set to output 2-channel PCM
  • upscales 1080p and 4K/60Hz video signals to Ultra HD (up to 8K)
  • gaming-optimized video processing technologies for a smooth, lag-free gaming experience
    • Variable Refresh Rate (VRR), Auto Low Latency Mode (ALLM), and Quick Frame Transport (QFT) reduce or eliminate lag and frame tearing
Other connections:
  • digital audio inputs: 1 optical and 1 coaxial
  • 3 analog stereo RCA line-level audio inputs
  • MM (moving magnet) phono input for connecting a turntable
  • preamp output for connecting to an external stereo power amp
  • rear-panel USB port for audio playback from USB flash drives
  • A and B speaker output pairs
  • 2 mono RCA outputs for connecting powered subwoofers
  • Ethernet port for wired network connection
  • IR input for use with external controllers
  • 1/4" headphone output
  • detachable power cord
General features:
  • free Marantz remote app lets you use your Apple or Android™ device as a Wi-Fi remote
  • Setup Assistant guides you through the initial connection process and settings
  • intuitive, full-color on-screen guide
  • Video Select lets you listen to music while watching video from a different source
  • HDMI standby pass-through allows HDMI switching without powering up receiver
  • gold-plated RCA terminals
  • sleep timer
  • AM/FM tuner
  • remote control
  • 17-3/8"W x 4-3/16"H x 16-1/16"D (7"H with Wi-Fi antennas raised)
  • weight: 18.5 lbs.
  • warranty: 5 years
  • MFR # STEREO70S/U1B

What's in the box:

  • Stereo receiver
  • 6' AC power cord
  • Remote control (RC052SR)
  • 2 "AAA" batteries
  • 2 WiFi/BT antennas
  • FM wire antenna
  • AM loop antenna
  • Quick Start Guide
  • Warranty Information
  • Safety Instructions
  • Notes on radio
  • Heos brochure

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More details on the Marantz Stereo 70s

Stacey B.

Features & specs

Performance Specs
Stereo RMS Power (watts) 75
THD in Stereo 0.08 %
Frequency Bandwidth (stereo) 20-20k Hz
Minimum Impedance 4 ohms
Amplifier Class AB
FM Sensitivity 12.8 dBf
Signal To Noise Ratio 98dB
Phono Signal to Noise Ratio 74dB
DAC Bit Depth 32-bit
DAC Sample Rate 192 kHz
High-res Audio Playback
From Network Yes
From USB Thumb Drive (USB-A) Yes
From Computer (USB-B) No
Streaming Compatibility
Bluetooth-compatible Built-in 5.0
Apple AirPlay Yes
Apple AirPlay 2 Yes
DTS Play-Fi No
Chromecast built-in No
Roon Tested
HEOS Yes
Total Number of Zones 2
Inputs & Outputs
USB Type-A Ports Yes
USB Type-B Ports No
Ethernet Wired Network Port Yes
Phono Input 1
HDMI Inputs 6
Total Audio Inputs 2
Optical Digital Audio Inputs 1
Coaxial Digital Audio Inputs 1
Headphone Output 1/4"
Stereo Preamp Output Yes
Subwoofer Output 2
Recording Output No
Speaker Output Pairs 2
Speaker Connectors Binding Posts
Removable Power Cord IEC 2-prong
Other Info
Alexa-compatible Yes
Google Assistant-compatible Yes
Built-in Radio Tuner AM/FM
Built-in Wi-Fi Yes
On-Screen Display Yes
Width (inches) 17-3/8
Height (inches) 4-3/16
Depth (inches) 16-1/16
Weight (pounds) 18.3
Parts Warranty 5 Years
Labor Warranty 5 Years
The Marantz Stereo 70s replaces these items:

Product Research

Audio Section
Video Section
Network & Tuner Functions
AirPlay/Bluetooth/USB Integration
Multiroom Audio Playback
Remote, App, & Voice Control
Convenience Features

Audio Section

High-Performance Discrete 2-Channel Amplifier: The Marantz Stereo 70s stereo network receiver features a custom, discrete high-current power amplifier with symmetrical design and an OFC (oxygen-free copper) winding power transformer. The Stereo 70s delivers a 75 watts x 2 channels (into 8-ohms @ 20Hz-20kHz with 08% THD). With low impedance drive capability, it offers greater stability with a wide range of floorstanding and bookshelf loudspeakers for balanced, quality sound.

Experts Sound Engineering: Marantz sound engineers use carefully selected HiFi parts, including custom resistors and audio grade capacitors, to tune the stereo receiver. Using the design principles found in Marantz ward-winning amplifiers, the Stereo 70s features a symmetrical layout, double differential DAC circuit and analog preamp circuits that don't interfere with the power supply. The dedicated circuitry with its short, straight paths between the power supply, signal and amplification ensure your loudspeakers drive detailed and precise imaging.

High-Resolution Audio Dual DAC Differential Circuitry: The Stereo 70s equipped with two 32-bit/192kHz digital-to-analog converters (DACs) featuring high-resolution audio decoding with multiple lossless file types. This premium DAC delivers amazing stereo imaging and detail. By assigning two DACs per channel including, you'll hear increased dynamic range and improved signal-to-noise. Compatible high resolution music file types include ALAC, FLAC and WAV at up to 24-bit/196kHz. It's also compatible with 2.8/5.6-MHz DSD files (DSD is the audio coding format of SACD). The Stereo 70s also supports low-res compressed music file types, such as MP3 and WMA. Thanks to its dual DAC differential circuit, the Stereo 70s lets you enjoy superb audio fidelity from all your favorite digital audio tracks.

Listening Modes: In addition to stereo playback, the Marantz Stereo 70s offers two Direct Listening Modes which bypass the receiver's tone & DSP processing for higher sound quality performance.

  • Stereo: Sound is output from the front left and right speakers, as well as the powered subwoofer, with digital signal processing and tone control.
  • Direct: Direct Mode provides playback of 2ch audio in its original form, without any digital signal processing or tone control.
  • Pure Direct: Pure Direct Mode goes a step further by turning off the receiver's DSP, tone control, display and analog video circuitry to minimize the possibility of any noise being added to the audio signal.

Note: The Stereo 70s is not compatible with Dolby Digital, DTS, or other multichannel surround formats.

Compressed Audio Restorer: Compressed audio formats such as MP3, WMA (Windows Media Audio), and MPEG-4 AAC reduce the amount of data by eliminating signal components that are hard for the human ear to hear. The Restorer function generates the signals eliminated upon compression, restoring the sound to conditions near those of the original sound before compression. It also corrects the sense of volume of the bass to obtain richer sound with compressed audio signals.

Speaker Setup: The Marantz Stereo 70s provides a Test Tone to help you setup the output level of your connected loudspeakers. While listening to the Test Tone, you can adjust the output level (-12 to +12dB) of the left and right speakers. You can also adjust the receiver's subwoofer output level (-12 to + 12dB); as well as the the subwoofer output's Low Pass Filter (40, 60, 80, 90, 100, 110, 120, 150, 200, or 250Hz). In addition, you can set the distance (0 to 60') between the speakers and subwoofer from your main listening position.

Note: This receiver does not offer auto speaker calibration and room correction.

Tone Controls: The Marantz Stereo 70s offers Bass & Treble control, along with balance adjustment. You'll be able to adjust Bass & Treble from -6dB to +6DB, as well as adjust the balance in sound output between the connected left and right speakers.

Volume & Level Settings: The Marantz Stereo 70s stereo receiver offers the following volume & level settings.

  • Volume Settings: You can choose to display an Absolute volume scale (0-98) or Relative volume scale (-79.5 to 18dB). You can also set a maximum volume level of 0 (80), -10 (70), or -20 (60) dB to limit the receiver's total volume output. In addition, you can define the volume setting that is active when the power is turned on; select "Mute", -79 to +18dB (1-98), or Last. Volume settings can be adjusted independently for the Main Zone and Zone 2.
  • Mute Level: You can set the amount of attenuation for the audio muting circuit; -40dB or -20dB below current volume, or full mute (sound turned off entirely).
    Source Level: This function adjusts the playback level of the currently selected input source's audio input. Use this feature if there are differences in the input volume levels between different sources. You can correct the playback level of the audio input from -12 to +12dB.

Analog & Digital Audio Inputs: The Marantz Stereo 70s is outfitted with both analog & digital audio inputs - including HDMI, optical & coaxial digital, as well as line-level and phono analog inputs.

  • HDMI: The five HDMI inputs only support 2ch PCM audio up to 24-bit/192kHz (not compatible with Dolby Digital, DTS, or other multichannel surround sound formats).
  • Optical & Coaxial Digital: The stereo receiver is equipped with one optical (toslink) digital input and one coaxial (RCA) digital input that support up to 24-bit/192kHz 2ch PCM audio (not compatible with Dolby Digital or DTS).
  • Analog Line-Level: There are three line-level analog inputs for connecting an external CD player, tape deck, and other legacy source device .
  • Phono MM: The Marantz Stereo 70s is outfitted with a Phono input (MM), so you can connect your turntable and listen to your vinyl records with high-quality sound.

Audio Outputs: The Marantz Stereo 70s stereo receiver features speaker A/B terminals, dual sub outputs, a HDMI ARC output, and front-panel headphone jack.

  • Speaker A/B Terminals: The receiver is equipped with speaker A/B terminals for connecting up to two pair of loudspeakers or bi-wiring a single pair of loudspeakers. These binding-post terminals can accept bare wire, pin connectors, and banana plugs (single/dual). When connecting one pair of loudspeakers to the Speaker A terminals, the receiver will accept impedances of 4 to 16-ohm. When connecting two pair of speakers to the Speaker A & B terminals or when bi-wiring a single pair of loudspeakers with the Speaker A & B terminals, the receiver will support impedances of 8 to 16-ohm. There is an impedance setting in the on-screen menu.
  • Dual Sub Outputs: For compatibility with dual subwoofer systems, the Stereo 70s features two non-discrete subwoofer outputs. With dual subwoofers, which can be placed in different parts of the room, you'll benefit from response averaging, which helps provide smoother and more detailed deep bass, compared to a conventional single subwoofer speaker system. The same signal is output from each sub output.
  • Headphone Jack: When headphones are plugged into the full-size 1/4" jack on the front panel, all the speakers are automatically muted.

ARC (Audio Return Channel): This feature of the stereo network receiver's HDMI monitor output allows audio to be sent from your compatible TV to the receiver through the same HDMI cable already being used to send audio and video to your TV. This eliminates the need for extra cables connected to your television. Only the 2ch PCM setting can be used to play sound from a TV via the ARC function. *Dolby Digital, DTS, and other multichannel surround sound formats are not supported.

Note: Your TV must also support ARC or eARC.

Video Section

HDMI 2.1: Featuring six HDMI inputs and one HDMI output, the Stereo 70s incorporates an advanced video section that features some of the latest HDMI 2.1 specifications; including support for 8K/60Hz and 4K/120 Hz video pass-through (up to 40Gbps), HDCP 2.3 compatibility, BT.2020 Wide Color Gamut, and 4:4:4 Pure Color sub-sampling. Use a premium High Speed 18Gbps HDMI cable for the best 4K/HDR performance. Use an Ultra High Speed 48Gbps HDMI cable to enjoy 8K video. Make sure to set the receiver's "4K/8K Signal Format" to "8K Enhanced" in the menu to enjoy 8K/60Hz or 4K/120Hz video.

  • 4K/120 Hz + 8K/60Hz Pass-Through: All of the Stereo 70s's HDMI inputs and monitor output support up to 4K (3840x2160 pixels) video @ 60 frames per second. Three HDMI inputs (HDMI 4-5-6) and the HDMI output also support 8K (7680 x 4320) video @ 60 frames per second, as well as 4K video @ 120 frames per second (both up to 40Gbps). In addition, the receiver will pass 1080p/i, 720p, and 480p/i video signals via HDMI.
  • HDCP 2.3 Compliant: All of the stereo receiver's HDMI inputs and outputs support HDCP 2.3, which fully complies with the latest copyright protection standard for 4K/HDR video transmission.
  • 4:4:4 Color Subsampling: The HDMI inputs and monitor outputs support RGB, YCbCr 4:4:4, YCbCr 4:2:2, and YCbCr 4:2:0 color subsampling (pixel depth and frame rate will vary). With 4:4:4 color subsampling, luminance (brightness) and chroma (color) are sampled at the same rate; resulting in an RGB color palette as big as the video sampling rate for a video image with more colors, plus greater color accuracy and detail.
  • Wide Color Gamut (BT.2020): The BT.2020 color standard delivers a much wider color gamut and represents about 75% of the total visual color spectrum, while the current Rec. 709 color standard selected as the color space for HDTVs and early generation 4K Ultra HDTVs covers only 35% of the total visual color spectrum.

Note: The stereo receiver does not offer any analog video inputs and outputs.

Dynamic HDR: HDR provides enhanced picture quality by simultaneously enabling greater detail for both the dark and bright parts of an image. HDR reproduces a greater dynamic range of luminosity or brightness levels, creating greater contrast. This increased contrast reveals the subtle nuances of the image, from detailed blacks and shadows to the brightest whites and colors, plus greater depth. Dynamic HDR enables a noticeable progression in overall video image quality from SDR to static HDR, and now static HDR to dynamic HDR. Dynamic HDR support ensures every moment of a video is displayed at its ideal values for depth, detail, brightness, contrast, and wider color gamuts on a scene-by-scene or even a frame-by-frame basis. Dynamic HDR enhanced content is available for movies, videos, TV shows, video and PC games and VR.

  • HDR10: HDR10 is an open standard and currently the most popular HDR format on the market. It uses static metadata at the start of a movie to tell the receiver and your TV that the video content is encoded using HDR.
  • HDR10+: HDR10+ is a new open standard that leverages dynamic metadata to produce enhanced contrast and colors on an expanded range of televisions. HDR10+ incorporates dynamic metadata that allows the adjustment of brightness levels on a scene-by-scene or even frame-by-frame basis. By applying individualized tone mapping to each scene, HDR10+ delivers an incredible viewing experience. The picture quality offers an enhanced visual experience with more detailed expressions, brighter shadow areas and more accurate color renderings that stay true to the creator's original intent.
  • Hybrid-Log Gamma: HLG (Hybrid-Log Gamma) is primarily designed for live video feed and over-the-air broadcasts. It uses no pre-encoded metadata and is backwards compatible with SDR. HLG's native compatibility allows much of today's existing SDR infrastructure to be re-used for HDR in the future.
  • Dolby Vision: Unlike HDR 10 which contains static metadata and HLG which uses no metadata, Dolby Vision uses dynamic metadata technology which sets individual color and brightness levels for each and every scene. Dolby works directly with filmmakers at major Hollywood studios to create superior HDR video masters of blockbuster movies.

4K/8K HDMI Video Upscaling: The Marantz stereo receiver offers HDMI video upscaling (up to 4K or 8K Ultra HD) thanks to its NatureVue video processor by Analog Devices. This sophisticated video processor provides upscaling of 1080p high definition HDMI connected sources to 4K or 8K Ultra HD; as well as 4K Video sources to 8K picture quality.

Note: It does not upscale 480i, 480p, 720p, or 1080i video.

Optimized Gaming: Showcased in the Stereo 70s are new HDMI features like Variable Refresh Rate (VRR), Quick Frame Transport (QFT), and Auto Low Latency Mode (ALLM) - which reduce or eliminate lag and frame tearing to offer a smoother, lag-free gaming experience.

  • Variable Refresh Rate (VRR): Support for Variable Refresh Rate (VRR) allows the TV to adapt to certain Game console's frame rate. This helps to reduce or eliminate lag, stutter and frame tearing for more fluid and better detailed gameplay.
  • Auto Low Latency Mode (ALLM): The receiver will enter ALLM (Auto Low Latency Mode) when it detects a gaming signal from a compatible device (such as a Xbox One) and allows for a smooth, lag-free gaming experience. During ALLM, the receiver disables the i/p scaler and Auto Lip Sync function.
  • Quick Frame Transport (QFT): Quick Frame Transport (QFT) transmits each frame at a higher rate to decrease "display latency", which is the amount of time between a frame being ready for transmission in the GPU and that frame being completely displayed. Enjoy reduced latency for smoother, tear-free entertainment experience.

Other HDMI Features: The Marantz Stereo 70s stereo receiver's HDMI connectivity also offers 3D video pass-through and auto LipSync function.

  • 3D Ready: The Stereo 70s stereo receiver supports 3D video pass-through (720p/1080p only) from connected 3D-compatible Blu-ray, games and broadcast devices to 3D-compatible HDTVs (all 3D components must be connected via HDMI). Special eye-wear will be required for viewing 3D content.
  • LipSync: This function adjusts the delay between audio and video output. You can do this manually or have the receiver set the LipSync function automatically. When connected to a TV via HDMI the receiver automatically adjusts audio output timing, if the TV supports an automatic LipSync function. You can also manually delay the sound output up to 500ms to synchronize it with the video image.

HDMI Standby Pass-Through: When the stereo receiver is in "Standby" mode and the HDMI Standby Pass-Through function is enabled, both audio/video streams from the receivers HDMI input will be output to your television, via the stereo receiver's HDMI monitor output. Once the receiver is turned "On", only video will pass through the monitor output to your TV and the audio is directed to the receiver's speaker outputs.

  • HDMI Input: Selects the HDMI Input for which the HDMI Standby Pass-Through function is enabled.
  • Last: The HDMI Standby-Through function is activated on the input source selected at the time of setting the stereo receiver to the "Standby" mode.
  • Off: The HDMI Standby Pass-Through function is disabled.

Video Select Function: This receiver can display video from a different source on your connected TV during audio playback from CD (analog input only), Tuner, HEOS, or Phono.

Network & Tuner Functions

Wired or Wireless Network Connection: The Marantz Stereo 70s offers a wired or wireless network connection. Either network connection gives the receiver access to HEOS music apps (like Pandora, Amazon,and Tidal), TuneIn Internet Radio, Spotify Connect, your music library on your Apple iOS or Android device, as well as music content on your Windows PC or DLNA music server.

  • Ethernet Jack: The Marantz Stereo 70s receiver is fitted with a RJ-45 Ethernet (LAN) port to make a wired connection from the receiver to your home network.
  • Built-in WiFi: The receiver also offers built-in WiFi (IEEE 802.11ac; 2.4/5GHz) for a wireless network connection; WPS, WEP, WPA-PSK (TKIP), WPA-PSK (AES), WPA2-PSK (AES), and WPA3-SAE (AES) security protection is supported. Wireless network setup can be done via WPS button, Access Point Scan, Manual Setting, PIN Code, or even through your Apple iOS device (7.0+).
Note: Network setup requires that the receiver be connected to your TV via HDMI for display of the on-screen menu. The receiver's network setup cannot be accessed through its front-panel display.

TuneIn Internet Radio: The Marantz Stereo 70s includes access to more than 100,000 free internet radio streams from all corners of the globe via the built-in TuneIn online music service. Simply select TuneIn from the receiver's on-screen menu using the included remote and browse among the 100,000 stations neatly organized into popular categories and select a station that appeals to you.

Spotify Connect: If you subscribe to Spotify and have the Spotify App on your Apple iOS or Android mobile device, you can stream Spotify to the Marantz stereo receiver. Spotify is a digital music service that gives you on-demand access to one of the largest music libraries in the world. Spotify makes it easier than ever to discover, manage, and share music with your friends. You can browse music by artist, album, track, or most popular; and create your own music library with customized playlists.

HEOS Music Apps: With built-in HEOS technology and the HEOS app (for Apple iOS and Android) on your compatible Apple iOS or Android mobile device, you'll be able to stream a wide variety of online music services (fees may apply), plus the music library of your mobile device through the Marantz stereo receiver.

  • Online Music Services: Using the HEOS app, you'll be able to stream your favorite online music services like Amazon Music (including HD), Pandora, TIDAL, iHeart Radio, SiriusXM, Napster, TuneIn, & Spotify (some services will require a paid subscription, purchases, and/or other fees). The HEOS app on your Apple iOS or Android device will serve as the controller for these apps and provide song/artist information with Album Art. You can create a "Favorite" station list, so you can quickly access your favorite internet radio stations and online music channels.
  • Mobile Device Streaming: Using the HEOS app on your Apple iOS or Android mobile device, you are able to stream your device's stored music library to the Marantz stereo receiver. You'll be able to browse your music library by Artist, Album, Genre, and Song; control music playback functions like Play/Pause and Previous/Next Track; and view song/artist info with Album Art from the app on your compatible mobile device. You can even type in an artist name or song title to find music in your mobile device's library.

Notes:

  • Prior to using the HEOS system, you'll need to setup up your free HEOS account. Your HEOS account remembers all your settings and preferences such as all your music service logins and HEOS playlists. When you'd like to add multiple smartphone or tablet controllers to your system, you only need to sign in to each new device with your HEOS user name and password. Instantly all your music services and HEOS playlists are available in the new controller too.
  • If you prefer, HEOS supports multiple accounts in a single household. This way, each family member can enjoy their own personalized Pandora, Spotify, or other online music account settings and still share all the same speakers in the home.

DLNA 1.5 Certified: The Stereo 70s is DLNA (Digital Living Network Alliance) 1.5 and Windows 7/8/10 compliant for audio networking. This means it's easier for you to access and enjoy digital music stored on your Windows PC. The receiver can wirelessly playback High-Res music content from your PC, while using the included remote control to browse your music library. The receiver supports ID3-Tag (ver.2) and META tag information; so song title, artist name, and album name can be displayed on the unit's front-panel or on-screen menu. In addition the unit will display Album Art on a connected television. The Marantz Stereo 70s supports the following audio formats, sampling frequencies, and bit rates via its wired network connection.

Resolution Compatible Audio Formats Sampling Frequencies Bit-Rate/Depth Extension
Hi-Res WAV (PCM) 32/44.1/48/88.2/96/176.4/192 kHz 16/24-bit .wav
FLAC (Free Lossless Audio Codec) 16/24-bit .flac
ALAC (Apple Lossless Audio Codec) 16/24-bit .m4A
DSD 2.8/5.6 MHz 1-bit .dsf/.dff
Compressed MP3 (MPEG-1 Audio Layer-3) 32/44.1/48 kHz 32-320 kbps .mp3
WMA (Windows Media Audio) 48-192 kbps .wma
AAC (MPEG-4) 16-320 kbps .aac/.m4a

Note: Your computer must meet the following system requirements - Windows Media Player Network Sharing Service or Windows Media DRM10. Album Art is only displayed when using Windows Media Player (ver.11/12).

Roon Tested: Roon is a feature rich music library and playback application that compiles all the music files available to your network and makes them easily available to play on the Marantz receiver and any other Roon enabled audio devices. Roon manages digital music files (including FLAC, WAV, AIFF, ALAC, and DSD) collected on hard drives and networked storage devices. It can also integrate your iTunes library, and optionally merge with the Tidal and Qobuz music streaming services. Roon software can be installed on your Windows or Mac computer, while a Roon Remote app is available for Apple iOS and Android OS). When you access the Roon software or remote app, it will display your complete audio library together with its metadata and artwork along with the available Marantz receiver and other Roon enabled devices. Simply select the music you wish to play and the Marantz receiver or Roon device in which you want to hear it on.

  • To use Roon you will need a Roon Core running on the same network as the Marantz receiver. The Core is media server software that runs on your computer, NAS, or component (like Nucleus or ROCK - sold separately), located on the network within your home.
  • Make sure your Marantz product has the latest firmware/software update installed.

AM/FM Tuner: The Marantz stereo receiver features a built-in AM/FM tuner with 56 station auto-preset memory tuning. You can also set your presets manually. You can create an 8-character name for each preset station. You can even directly enter a station number using the receiver's on-screen menu and remote control.

AirPlay/Bluetooth/USB Integration

AirPlay 2 with Siri: AirPlay 2 is an advanced and easy-to-use wireless multiroom audio platform for iTunes, Apple Music, and other compatible Apple iOS apps. With AirPlay 2 you can play any audio from your Apple iOS device (running iOS 11.4 or later) or Mac computer (running OS X 10.13.2) on the stereo receiver and other compatible AirPlay 2 speakers throughout your home. You can choose to play audio in one room, play the same audio in grouped rooms, or play the same audio in every room. If you are an Apple Music subscriber, you can even play different music in different rooms (you can control and group directly from Apple's Music App and Home app on your Apple iOS device). You'll be able to ask Siri-enabled devices (like your Apple iPhone, iPad, or Watch) to control playback of your Apple Music content on the stereo receiver. With AirPlay 2, you also get to see song/artist information and album art via the receiver's on-screen menu (via HDMI). You can even watch videos and movies from YouTube and Netflix on your compatible Apple iOS device or Mac computer with perfectly synced audio on the stereo receiver.

Built-in Bluetooth: The Marantz Stereo 70s is equipped with built-in Bluetooth (version 4.2) for wireless communication between Bluetooth-enabled audio source devices and headphones. The Stereo 70s can act as a Bluetooth receiver in order to wirelessly stream music from an audio device, or a Bluetooth transmitter in order to wirelessly stream music to a set of BT-enabled headphones. The receiver's Bluetooth wireless range is approximately 98.4'.

  • Bluetooth Receiver Mode: In BT Receiver mode, you'll be able to wirelessly stream stored music, music apps, and other audio content from your Bluetooth-enabled source device (such as your smartphone, tablet, computer, or laptop) to the Marantz receiver. The receiver supports the Bluetooth SBC codec only. You will also be able to control basic playback functions (Play/Pause, FF/RW, Skip) using the receiver's remote control. Advanced music operation will still need to be handled from your Bluetooth-enable device. There is no song/artist information display on the receiver or connected TV; continue to use your Bluetooth device's screen to view song/artist info. Up to eight Bluetooth source devices can be remembered by the Stereo 70s, so family members as well as friends can enjoy their favorite tracks (only one device can be used at a time). The receiver can even be setup to automatically re-connect with previously paired devices, as well as turn on automatically when you start streaming audio from a Bluetooth source device.
  • Bluetooth Transmitter Mode: The Marantz Stereo 70s can also act as a Bluetooth transmitter and stream its non-Bluetooth audio sources (HDMI, Network, USB, Analog, Optical/Coax Digital, & AM/FM tuner) out to most any Bluetooth-enabled headphone set. You can even have the same source playing from the main speakers and a Bluetooth headphone simultaneously (with little noticeable delay). Volume control of your Bluetooth headphones will be controlled via the Bluetooth device and not the receiver. Up to eight headphones can be paired with the receiver, but only one set of headphones can be connected and used at a time.

Notes:

  • You cannot use the Bluetooth Transmitter and Receiver modes simultaneously. The Bluetooth Transmitter mode is not available when the receiver's current source input is set to Bluetooth and vice-versa; Bluetooth Receiver mode is not available when the Bluetooth setting "Transmitter" is set to ON.
  • Selecting a Bluetooth input source in any Zone will terminate the connection between the Marantz receiver and Bluetooth headphones.
  • You cannot connect Bluetooth headphones when the Marantz receiver is grouped within the HEOS app. Remove the receiver from the group to enable Bluetooth headphones connection.

Rear-Panel USB Port: The Marantz receiver is equipped with a rear-panel USB-A 2.0 port that allows you to enjoy a variety of music files from a USB mass storage class memory device; such as a USB thumbdrive or portable HDD (a portable hard disk drive will require an external power supply). Compatible USB storage devices must be formatted in FAT32 or NTFS with no more than 500 music folders and 5000 music files. You can use the receiver's on-screen menu (via HDMI) and remote control to navigate your stored music files on your connected USB memory device. Song/artist information will display on your HDMI-connected TV and the receivers front-panel display. USB devices that can be charged via USB will be charged when plugged into the stereo receiver's USB port (5V/1A); even in standby mode.

Resolution Compatible Audio Formats Sampling Frequencies Bit-Rate/Depth Extension
Hi-Res WAV (PCM) 32/44.1/48/88.2/96/176.4/192 kHz 16/24-bit .wav
FLAC (Free Lossless Audio Codec) 16/24-bit .flac
ALAC (Apple Lossless Audio Codec) 16/24-bit .m4A
DSD 2.8/5.6 MHz 1-bit .dsf/.dff
Compressed MP3 (MPEG-1 Audio Layer-3) 32/44.1/48 kHz 32-320 kbps .mp3
WMA (Windows Media Audio) 48-192 kbps .wma
AAC (MPEG-4) 16-320 kbps .aac/.m4a

Note: The receiver's USB port is not compatible with Apple iPod/iPhone/iPad, Android OS devices, USB hubs, card-readers, and computers.

Multiroom Audio Playback

Zone 2 Pre-Outs: Zone 2 allows stereo playback of an audio source connected to the receiver in another room of your home via its RCA preamp outputs, an external amplifier, and pair of loudspeakers. When using the receiver's Zone 2 preamp outputs, you'll need an additional amplifier and pair of loudspeakers in the other room. The volume of Zone 2 can be controlled by the Marantz receiver or from your external integrated amplifier.

  • Compatible Sources:
    • HDMI Audio (2ch PCM only)
    • Optical/Coaxial Digital Inputs (2ch PCM only)
    • Analog Audio Inputs (including Phono)
    • AM/FM Tuner (cannot select different stations for each zone)
    • USB & Bluetooth Audio (cannot select USB & Bluetooth in separate zones)
    • HEOS Music Apps (including Pandora, Tidal, Amazon, and more); cannot select different HEOS music apps for each zone
    • Network Sources (including TuneIn Internet Radio, Spotify Connect, AirPlay, & DLNA); cannot select two different networks sources for Zone 1 and Zone 2
  • Incompatible Sources:
    • HDMI Video
    • DSD Audio Files

Note: Unfortunately, you cannot select USB, Bluetooth and Network sources exclusively for each Zone. For example, if you select a network source for Zone 2 when a USB source is selected for the Main Zone, the input source in the Main Zone also switches to the same network source as Zone 2.

All Zone Functionality: The Marantz Stereo 70s offers an All Zone TV Audio and All Zone Stereo mode that allows you to listen to the same audio/video source in the Main Zone and Zone 2.

  • All Zone TV Audio: The All Zone TV Audio feature lets you play the same audio source as your TV in the Main Zone and Zone 2 without losing fully discrete surround sound in the Main Zone. Enjoy fully discrete audio such as Dolby Atmos in the main zone for a completely immersive experience, while playing the same source in the second zone. The Stereo 70s supports both HDMI and digital optical/coaxial sources for your second zone when "All Zone TV Audio" is active.
  • All Zone Stereo: The All Zone Stereo function allows you to enjoy the stereo receiver's Main Zone audio source in Zone 2 simultaneously (regardless of input audio signal types - analog, digital [including HDMI ARC/eARC], or wireless). During the All Zone Stereo mode, only the "Multi Ch Stereo" and "Stereo" sound modes can be selected. You will have independent volume control in each zone. All Zone Stereo mode is useful when you want to enjoy the same music at the same time in multiple rooms during a get together or party.

Speaker B: The Stereo 70s is equipped with Speaker A and B speaker terminals for connecting up to two pair of loudspeakers. Speaker A can be used for your main stereo loudspeakers, while Speaker B can be used for a pair of loudspeakers in another room. Speaker A and Speaker B can be active at the same time, or you can play only Speaker A or only Speaker B. When played together, Speaker A and Speaker B will output the same audio source at the same volume level (does not support independent sources or independent volume control). When connecting two pair of speakers to the receiver, you should use 8 to 16-ohm speakers (not compatible with 4-ohm).

HEOS Wireless Multiroom Audio: Built-in HEOS technology enables the Stereo 70s to become part of the HEOS wireless multi-room audio eco-system, allowing you to stream and control all of your local and online music effortlessly from anywhere in your home with the HEOS App on your compatible Apple iOS or Android mobile device over a wireless WiFi network connection. The HEOS system is a true multi-room audio system that automatically synchronizes audio playback between multiple HEOS devices so that your music (up to 24-bit/192kHz Hi-Res audio) coming from different rooms is perfectly in sync and always sounds amazing. You can play the same audio source in every room or any combination of rooms you choose, including a different song in every room.

  • Systems & Groups: The HEOS wireless multi-room sound system can support up to 32 HEOS speakers, receivers, amplifiers, and/or pre-amplifiers (all sold separately) on a single wireless network (IEEE 802.11 g/n; 2.4/5GHz). You can join or group up to eight individual Heos devices into a group that function as if they were a single source. The HEOS eco-system is flexible enough where you can create up to 16 Groups (2 Heos devices per Group). You can easily group 16 rooms together with Party Mode by simply using a "pinch" gesture.
  • Compatible Sources: The receiver's input sources, HEOS music apps, and local network content can be distributed through a HEOS multi-room audio system. However, you cannot distribute an input source (analog, HDMI, optical/coax, USB, Bluetooth, tuner) that is different than the main zone of the stereo receiver (this is a change from previous HEOS enabled stereo receivers).
    • Receiver's analog inputs & AM/FM Tuner
    • HDMI (including eARC) and optical/coax digital inputs; will downmix multi-channel audio sources to 2ch (receiver's main zone will retain multi-channel audio decoding)
    • TuneIn Internet Radio & Spotify Connect
    • HEOS music apps (including Amazon, Pandora,Tidal, and more)
    • Windows PC & DLNA music servers
    • Bluetooth & USB audio (AirPlay 2 is not supported)
    • Music libraries stored on your Apple iOS or Android mobile device.

Note: The Marantz stereo receiver only supports a single HEOS music stream. If you desire a second HEOS music stream through the receiver's multizone output, you will need to connect the HEOS Link to one of the stereo receiver's analog inputs.

Remote, App, & Voice Control

IR Remote: The Marantz Stereo 70 comes with an IR remote for wireless operation of the stereo receiver. It also supports HDMI-CEC and Smart TV Control.

  • HDMI CEC: HDMI CEC allows you to link operation of the receiver with other audio/video components (like your TV, Blu-ray player, or satellite/cable box) that are connected via HDMI. Linked functions include Power On/Off, which turns the receiver On or Off when you power on or off an HDMI CEC connected component; and Source Switching, which automatically switches the receiver to the input of the HDMI CEC component that has begun playback. The HDMI CEC and certain functions within HDMI CEC can be disabled, if you prefer. Not all HDMI CEC compatible devices will function in the same way.
  • Smart TV Control: You can even control the Marantz Stereo 70s with your Smart TV remote via an HDMI connection and the HDMI CEC functionality associated with your Smart TV. Simply set "HDMI Control" to ON in the receiver, then set "Smart Menu" to ON and begin controlling the Stereo 70s with your TV's remote. The Smart Menu home screen provides you quick access to source and surround mode selections, the receiver's setup menu and four Smart Selects (or "Quick Selects").

HEOS App: You'll need to download the HEOS App (for Apple iOS and Android OS) onto your compatible Apple iOS or Android mobile device to enjoy HEOS functionality through the Stereo 70s receiver. Using your compatible mobile device and the HEOS app, you can setup, browse, explore, and control HEOS system right in the palm of your hand, from anywhere in your home. Your compatible Apple iOS or Android device must be connected to the same home wireless (WiFi) network as the stereo receiver and your entire HEOS system. The HEOS app consists of 4 control screens.

  • Settings: The "Settings" screen enables you to connect one or more HEOS speakers, receivers, amplifiers, and/or pre-amplifiers to your home's wireless network.
  • Rooms: From the app on your Apple iOS or Android device, you can select which rooms you want playing. You can play the same music in multiple rooms by grouping rooms together, or you can listen to a different source in each room.
  • Music/Sources: You can select what music and which source you want to listen to from the app. Choose from online music services like Pandora, Spotify, TuneIn, Tidal, etc.; your stored music library on your Apple iOS or Android device, Windows PC/DLNA server, or USB thumbdrive; as well as the receiver's analog, digital, and HDMI inputs. You can also select music from Playlists you've created, Favorites you've saved, and your recent listening History.
  • Now Playing: The "Now Playing" screen displays song, artist, and album information; along with Album Art. You also get basic playback controls like Play/Pause and Previous/Next Track, plus Volume controls Up/Down and Mute. In addition the "Now Playing" screen includes functions unique to the selected online music service or music library.

Alexa Compatible: HEOS and Amazon Alexa customers can now enjoy the convenience of Alexa voice control plus high-quality wireless home audio. In addition to controlling your HEOS components with the HEOS app on your mobile device or tablet, you can now control them with Amazon Alexa voice technology and an Amazon Alexa device (such as the Echo or Echo Dot, sold separately). Your HEOS components and the Alexa-enabled devices must be on the same network. You will also need to download the Alexa app (for Apple iOS or Android OS) onto your compatible Apple iOS or Android device. Voice control features include -

  • Alexa voice commands include Volume (up/down, specific volume number, & mute); Playback (Play, Pause, Stop, Next, Previous, Resume); and Power on/off. And thanks to the latest firmware update, you can even use Alexa to switch inputs on HEOS enabled stereo receivers and soundbars.
  • You can group your HEOS-enabled devices using the HEOS app with an Alexa-friendly name. Once they are grouped, Alexa voice commands will control the group as a whole. If you want to play audio content from only one HEOS-enabled device in the group, you must ungroup the device within the HEOS app.
  • You are able use voice commands to search for songs, albums and artists and even podcasts and internet stations from HEOS & Alexa compatible music apps - like Amazon Music, Pandora, TuneIn, iHeartRadio, Spotify Connect, & SiriusXM.
Note: For a list of current Alexa voice commands supported by the HEOS HomeEntertainment Skill, click here. For setup instructions, click here.
Google Assistant Support: Ask your Google Home, the Google app (for Apple iOS and Android), or other devices with Google Assistant built-in to control HEOS content across your listening environment. Once you start music in the HEOS app, you can ask the Google Assistant to control volume, play, pause, skip tracks, and more. Once you have grouped your HEOS-enabled devices using the HEOS app, you can use the Google Assistant and voice commands to control a group of HEOS devices as a whole. Make sure the unit has the latest HEOS software and firmware update installed.
  • A future firmware update (no ETA) will allow you to use the Google Assistant and your voice to queue up music services, power on/off devices, switch inputs and more.
  • Click here for more info on Google Assistant for HEOS.

Josh.ai Smart Home Voice Automation: An elevated voice agent for the high-end smart home, Josh.ai offers flexible voice control for nearly any aspect of your day-to-day experience and entertainment environment. Use voice commands to control the Marantz stereo receiver, thermostat, lights, home appliances, powered speakers, and more. Josh.ai is installed by custom integrators and accessed through the Josh - Home Automation app on your Apple iOS or Android OS device.

AVR Remote App: The new Marantz AVR Remote App (for Apple iOS 12.0+ and Android OS 5.0+) lets you control the Marantz stereo receiver using your compatible Apple iOS or Android mobile device. From this free app on your compatible Apple iOS or Android device, you'll be able to control the Marantz stereo receiver's basic functions; such as power, volume, input, surround modes, and other settings. You'll also be able to navigate the stereo receiver's network and Internet content from the app. In addition, you get unique features like a landscape orientation control screen for tablet devices, the ability to create playlists, and control over a Marantz Blu-ray player.

  • Landscape Orientation Control Screen: With a landscape orientation control screen for tablet devices, you can easily browse and navigate through your network music services or personal digital music collection with ease, and at the same time view now-playing information and cover art all on a single screen.
  • Create Playlists: The app's playback screen allows you to easily build your own personal music playlists on the fly with the ability to Drag & Drop files into your queue, or tap to "Play Now", "Play Next", "Play Next and Replace Queue" or "Add to End of Queue". You can then save your queue as a playlist for easy recall.
  • Marantz Blu-ray Player Control: The app allows control over Marantz Blu-ray players (UD5007/7007 series) that are connected to the stereo receiver via HDMI.

Note: This stereo receiver is not compatible with last year's older Marantz Remote App.

Custom Integration: The Marantz Stereo 70s provides advanced remote connectivity and control features often required for custom home integration and theater applications using premium control systems. These features include IP control, a Flasher IR input, as well as remote in/out jacks.

  • Flasher IR In: The Flasher IR input (3.5mm) is to be used with an optional IR repeater system (sold separately).
  • Remote Jacks: When the RCA remote control jacks of this unit are connected with the remote control terminals of Marantz components, the connected devices can be controlled with a single remote control.
  • IP Control: The receiver can be set up and operated by a home computer on the network via IP control, either via wired LAN connection or Wi-Fi, and also features Control4 SDDP (Simple Device Detection Protocol) certification for quick and easy integration with Control4 home automation equipment.
Convenience Features

Slim Design Chassis: The Marantz Stereo 70s stereo receiver features a slim designed chassis, so it easily fits on a shelf or inside a cabinet. The front-panel is clean, precise, and inviting. Volume, Source, Tone, and Balance control knobs flank a circular "port-hole" volume/source display.

OSD w/ Setup Assistant (via HDMI): Once you connect your TV to the Stereo 70s via HDMI, the exclusive Marantz Setup Assistant appears on your TV screen to walk you through setup, step-by-step. With Marantz's on-screen menu and setup assistant, you can connect, configure, and use your home theater system with ease. The OSD and setup assistant features clear on-screen graphics and text that optimizes critical system settings for your particular setup.

Smart Select: On the Marantz Stereo 70s's front-panel and remote, you'll find four Smart Select buttons that let you quickly choose from the most popular input sources (including HEOS Music). With Quick Select, the Stereo 70s remembers not only your preferred inputs but also your preferred audio settings, so you can enjoy precisely tailored sound with each one.e.

Input Rename & Delete: The stereo receiver will automatically rename its HDMI inputs to the connected devices' names using HDMI CEC (the HDMI Control function must be enabled). You can also manual change the display names (up to 16 characters) of analog, HDMI, and optical/coaxial digital input sources. If an input isn't being used, you can delete it from the display so you don't have to scroll past it when you change sources.

Lock Functions: To prevent accidental operation of the stereo receiver, you can disable operation of the buttons on the front-panel. You can also disable the receiver's IR sensor to prevent accidental operation of the receiver from the remote control.

Sleep Timer & Auto Standby: The Marantz stereo receiver features a programmable Sleep Timer and Auto Standby function. The Sleep Timer function allows you to automatically set the power to standby after a predetermined amount of time has passed; set the sleep timer up to 120 minutes in 10 minute increments. The unit will enter Standby mode automatically when no commands are sent to the unit for the set time (15/30/60 minutes). Before it enters the standby mode, "Auto Standby" is displayed on the front-panel display of this unit and the on-screen menu.

ECO Mode: This receiver is equipped with an ECO Mode function that allows you to enjoy music and movies while reducing the power consumption during use, Eco mode adjusts the maximum power available according to the volume level selected to reduce power consumption.

Protection Circuit: This is a function to prevent damage to components within the power supply when an abnormality such as an overload, excess voltage, or over-heating occurs. In this unit, the power indicator blinks and the unit enters standby mode when an abnormality occurs.

Software Updates: Using the receiver's network/internet connection, you can check for and update the latest firmware from the online Marantz server. You can also set the receiver to automatically download the latest firmware and software updates when it is in standby mode

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Customer Q&A

4 questions already asked

Q
What is the highest bitrate available when streaming Tidal MAX?
ryan  Jan 19, 2024
1 answer
A
Greetings Ryan. Thank you for your question. You can find the different levels of Tidal bit rates below. MAX is 24/192. https://tidal.com/sound-quality
hogan  Jan 20, 2024 (Staff)
Q
Does this amplifier offer variable voltage? e.g. can it do both 110v and 220/240v?
ben  Jan 03, 2024
1 answer
A
Greetings Ben. Thank you for your question. No sir. It is only 120v 60Hz.
hogan  Jan 03, 2024 (Staff)
Q
Is the silver model scheduled to be released in the United States, or will it only be available overseas?
peter  Dec 07, 2023
1 answer
A
As of right now Peter, we have the Marantz Stereo 70s available in black. We cannot predict the future but can say as of right now, I see no indication of a silver model of the Stereo 70s coming soon. I hope this helps!
bo  Dec 07, 2023 (Staff)
Q
Hi, is it possible to run 4 Ohm impedence speakers in one zone and 8 Ohm impedence speakers in the other zone (A+B) at the same time?
daryl  Oct 26, 2023
1 answer
A
This would not be possible. When running A and B speaker sets simultaneously, each speaker must offer a nominal impedance of at least 8-ohms. This is because the A and B speaker terminals are internally connected in parallel when running A and B simultaneously. This means that each channel is presented a 4-ohm impedance when using 8-ohm speakers. The receiver is only rated for operation at a minimum 4-ohm impedance.
zachary  Oct 26, 2023 (Staff)

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