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Rockford Fosgate TM400X4AD

Power Series marine/powersports 4-channel amplifier — 100 watts RMS x 4

Item # 575TM400X4

Rockford Fosgate designed their Power Series TM400X4ad 4-channel amplifier for marine and powersports applications.

Rockford Fosgate designed their Power Series TM400X4ad 4-channel amplifier for marine and powersports applications.

Item # 575TM400X4

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C$629.99
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About the Rockford Fosgate TM400X4AD

Ready to rock your boat

Rockford Fosgate designed their Power Series TM400X4ad 4-channel amplifier for marine and powersports applications. You can power systems with front and rear speakers, drive a pair of subs, or switch the amp to 3-channel mode to power a system with a set of speakers and a subwoofer.

Ready to rock your boat

Rockford Fosgate designed their Power Series TM400X4ad 4-channel amplifier for marine and powersports applications. You can power systems with front and rear speakers, drive a pair of subs, or switch the amp to 3-channel mode to power a system with a set of speakers and a subwoofer.

Rockford Fosgate's proprietary Class AD technology allows this compact amp to draw big power with less current draw from your electrical system, while the Constant Power feature keeps power consistent with varying impedances. High- and low-pass filters tailor the amp to the job at hand, whether it's powering a nice set of component speakers or a couple of marine subs. This amp will provide outstanding power and versatility in a variety of vehicles on land and sea.

Made to handle moisture and heat

It's built to stand up to outdoor life, too, with conformal-coated circuitry that withstands moisture and dirt and stainless steel hardware that won't succumb to corrosion. With a 3-stage thermal lock extrusion, dual- fan forced induction system, and real-time thermal monitoring, the TM400X4AD can rock hard without overheating – even when it's tucked into a tight space.

Level setting made easy

The TM400X4ad uses Rockford Fosgate's CLEAN level setting technology, so there's no more guesswork while setting your gain levels. Easy-to-see LED indicators identify clipping so you can set your amp up for maximum performance while eliminating distortion.

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Product highlights:

  • 4-channel marine/powersports amplifier
  • 100 watts RMS x 4 at 4 ohms (400 watts peak)
  • 100 watts RMS x 4 at 2 ohms
  • 200 watts RMS x 2 at 4 ohms (bridged)
  • CEA-2006 compliant
Features:
  • Class AD amp technology
  • 4-ohm/2-ohm multi-impedance constant power
  • conformal-coated circuit board — suitable for power sports and marine applications
  • marine-grade stainless steel hardware
  • twin cooling fans and real-time thermal sensing
  • hidden top-mount control panel
  • CLEAN set-up technology with LED input/output indicators
  • speaker-level inputs (speaker wire to RCA adapter required)
Specs:
  • variable low- and high-pass filters (50-250 Hz at 12 dB/octave)
  • tone controls: 0-18 dB at 45 Hz; 0-14 dB at 12,000 Hz
  • frequency response: 20-20,000 Hz
  • fuse rating: 60A x 1 (fuse not included)
  • dimensions: 8-5/8"D x 1-11/16"H x 4-5/16"W
  • requires 8-gauge power and ground cable
  • warranty: 2 years
  • Our 60-day money-back guarantee
  • MFR # TM400X4AD
KEEP READINGREAD LESS

What's in the box:

  • 4-Channel moto-marine amplifier
  • Power/ground/turn-on plug (installed)
  • Two 8" Speaker output harnesses (bare wire to 4-pin Molex)
  • Two 14" Input harnesses (2 RCA to 4-pin Molex)
  • Setup Disc (CD)
  • Amplifier Quick Setup
  • Certificate of Performance Verification

Customer reviews

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Rockford Fosgate TM400X4AD reviews

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Best compact amp

Lucas from Mobile Alabama on 7/9/2019

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This is a powerhouse amp! Don't let its size fool you it will power any door speakers on the market to their limits! Size fits anywhere on any vehicle and very efficient for its size!

Pros: Super efficient, priced well, clean install, easy gain setting, powerhouse

Cons: Would love to have 4gauge inputs but not super necessary.

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Rockford Fosgate TM400X4AD

Crutchfield customer from Rogers, TX on 5/21/2019

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This was an awesome Put it on my street glide 6 and a 1/2 inch speakers and man it made a difference

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Cons:

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Rockford Fosgate TM400X4AD

Crutchfield customer from Dexter, NM on 4/25/2019

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I love this Amp works great on my Harley

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Rockford Fosgate TM400X4AD

Eric from Vacaville, CA on 1/24/2019

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Was easy to install very straight forward and simple with a few basic hand tools. Sounds amazing as well

Pros:

Cons:

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Rockford Fosgate TM400X4AD

david from rossburg ohio on 1/6/2019

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great amp works great, install on polaris ranger wiring kit was awesome thanks Garret for the great help with intall..and walking me thru setup!

Pros: easy made to fit polaris with kit awesome sound great tech support at crutchfield.

Cons: instructions could be better,that come with it,,but garret got me thru it,

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Rockford Fosgate TM400X4AD

Terry from Donna, TX on 10/28/2018

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Fantastic. Installed on Harley touring and it rocks.

Pros: Easy installation set up,small size

Cons: Hate the power connector. The pos and negative are so close together you really have to be cautious with the recommended 8 GA wire.

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2 of 2 found this helpful

Big clean power, small chassis design

Brian from Port St Lucie, FL on 10/28/2018

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Replaced a 20 year old volfenhag amp that was rather large. This amp is just as powerful with a much smaller footprint. The wiring and installation was very easy and the sound quality is very good. Glad to see that technology is making big power out of small chassis designs. Recommend to others.

Pros: Very small chassis which makes it easy to mount, clean powerful amp. I turned it up to max level for 30 minutes continuously, the amp got hot but never cut off. I am impressed. My kicker amp when it gets hot shuts off to protect itself.

Cons: None to talk about

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2 of 2 found this helpful

Awesome amp!

jeffrey from Poplar Grove, IL on 5/6/2018

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Previously I had the 450? Hog tunes set up in my 2007 H D fhhtcu (ultra), this amp is a HUGE sound upgrade. I called Fosgate to get recommended set up leveled for the amp, lows are cut off at about 80 he. I have titan7.1 in the front and the hog tuns in the back. Now the music actually hits hard, and clarity is incredible. People in our ride pack can't hear there own stereo when ridin. It's awesome ??

Pros: All good

Cons: None yet

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3 of 3 found this helpful

Sounds good, but there's fitment issues

Len from Dayton, OH on 5/3/2018

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I installed this amp with the amp mounting bracket on a 2013 harley road glide. The head light wouldn't fit in the fairing afterwards. I was told by customer service at rockford fosgate that they're aware of the fitment issue and that I'd need to cut a one inch square off the amp bracket for the head light to fit. I cut the bracket as instructed and the headlight still doesn't fit because the amp is in the way of the head light. I disconnected the left head light so it would fit back in the fairing and am only using the right head light at the moment. Maybe I will put the amp in the bag and remove from the fairing so both head lights will work. With the fitment issue this deserves one star. But after adding the RF 6x9 bag speakers with this amp, along with focal front speakers and aquatic head unit with serius. It does sound very good. Hence 2 stars instead of one

Pros: Good sound

Cons: Does not fit in fairing of 2013 road glide as advertised. Maybe I'll install in a bag

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1 of 5 found this helpful

ROCK N ROLLLLL

James from Sarasota, FL on 11/11/2017

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Upgraded from the Fosgate pb amp and added Fosgate saddle bag speakers. This system ROCKS!

Pros:

Cons:

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3 of 3 found this helpful

Disappointed

Crutchfield customer from Astoria, NY on 11/9/2017

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I was so excited when the amp arrived Wednesday just in time for my big trip Friday( 3 day weekend ) I installed the amp everything was smooth until I turned it on to check it before puttin the roadglide fairing on and no left channel. Ok maybe I did something wrong I pulled out the amp checked all connections and found that the speaker output plug coming out of the amp is the cause when pressure is applied it works when released the left speaker shuts off . I put the bike back together using the rear outputs until Crutchfield sends me a replacement when they come back in stock date unknown. I was so mad I recorded the event and will be posting a video on YouTube about it unless someone makes this right for me. Right now I feel like this is just another overpriced piece of junk!

Pros: Easy install, no cutting wires

Cons: Mine doesn't work

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3 of 6 found this helpful

Great for 2015 Harley Ultra Classic

Paul from Florida on 12/14/2015

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Installed this on my 2015 Harley Davidson Electra Glide Ultra Classic and what a difference it has made. I also installed Focal speakers and tossed the hog tunes speakers in the trash! When I pump up the volume, you can hear the music two blocks away. I am a happy camper.

Pros: Very clear and no distortion. LOUD! It will blow you off the bike.

Cons: Must get the radio flashed at the Harley shop with the instructions supplied on Rockford Fosgate web site. Once the flash is done you need to select the two channel mode. Once the flash is done, the head unit looses the front and rear fade capability and does not send out rear speaker signals. The Amp in 2 channel mode does send the output signals to both front and rear speakers. Once you fine tune the Amp, you will have one heck of a sound system.

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10 of 10 found this helpful

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Product Research

Features
Controls
Connections

Features

Overview: The Rockford Fosgate TM400X4ad is a 4-channel Power Series "moto-marine" amplifier with a rated power output of 100 watts per channel at 4-ohms or 2-ohms. This Element Ready amplifier can be used on motorcycles, ATVs, or boats, and can withstand harsh environmental conditions.

CEA-2006 Compliant: CEA-2006 is a system of testing and measurement methods for mobile audio amplifiers. This voluntary standard advocates a uniform method for determining an amplifier's RMS power output and signal-to-noise ratio. The criteria for measuring power uses a DC input voltage of 14.4 volts and the RMS power output is measured into a 4Ω load with 1% or less Total Harmonic Distortion plus noise (THD+N). CEA-2006 allows consumers to compare amplifiers and receivers under identical conditions. The CEA-2006-rated RMS power output is 100 watts RMS x 4 channels. Additionally the power output is 100 watts RMS x 4 channels into 2Ω and 200 watts RMS x 2 channels bridged (into 4Ω).

Element Ready: Rockford Fosgate's Element Ready Amplifiers are protected against dust, UV rays, and corrosion. Marine-grade, two-part epoxy-coated circuit boards are used to prevent corrosion due to exposure in moist and humid places. In addition, stainless hardware is used to help prevent rust and corrosion of all electrical connections.

Class-AD: The TM400X4ad features Rockford Fosgate's proprietary Class-AD technology, which allows the amplifier to produce more power with less current draw from the vehicle's charging system.

3-Stage Airflow: The amp's 3-stage airflow method efficiently rids the chassis of heat to keep the amplifier running cool. Dual fan forced induction pulls in fresh air. The air flows over the MOSFET transistors to cool them down, and out through the exhaust channel. The top and bottom heat sinks are decoupled, which allows the top to remain cool to the touch. At least 2-3 inches clearance should be provided around the fan intake and the exhaust vents to optimize air flow.

DSM (Discrete Surface Mount): High speed robotics are used in the manufacturing process to place 1% tolerance parts and large board traces. DSM improves the efficiency of the circuit, decreases cross-talk from other discrete components and lowers operating temperature.

CLEAN Set-Up: Rockford's integrated level setting technology, CLEAN (Calibrated Level Eliminates Audible Noise), replaces sophisticated test equipment with input/output clip LEDs, allowing you to match the source unit's output to the amp's gain, and optimize the amp's output. The input clip indicator works in conjunction with the audio source volume, illuminating red when the source reaches its clipping point. The output clip indicator works in conjunction with the input level dial on the amp, illuminating the appropriate color depending on the audio content used for the setup.

Controls

Input Level: The amplifier has dual input level controls for the front and rear channels, conveniently accessible from the top. To accommodate the varying range of signal levels from today's factory and aftermarket radios, the input levels are adjustable from 150mV to 12V. A small flat-head screwdriver (not supplied) is needed to adjust the levels.

Input Switch: With the input switch in the 2-channel position, connecting only the front inputs will send the signal to both the front and rear sections of the amplifier. In the 4-channel position, both front and rear inputs must be used.

Crossover: The amplifier has dual built-in Butterworth crossovers for the front and rear channels, variable from 50 Hz to 250 Hz with a slope of 12dB/octave. They can be independently set to high-pass, all-pass (full range), or low-pass operation. The rotary frequency settings can be adjusted with a small screwdriver.

Punch EQ: The amplifier has dual Punch EQ functions that change with the crossover switches. When the crossover is set to low-pass, the Punch EQ acts as a variable bass boost; 0 to +18 dB at 45 Hz. When the crossover is set to high-pass, the Punch EQ acts as a variable treble boost, 0 to +14 dB at 12.5 kHz. When the crossover is set to all-pass, both the bass and treble boost circuits are active.

Connections

Power Connections: The TM400X4ad's power, ground, and remote turn-on terminals are located on a single, removable plug. This allows you to quickly and easily connect or disconnect the amplifier. Each individual terminal on the plug is a captive c-clamp connector which will accommodate up to 8-gauge wire. A Phillips- or flat-head screwdriver (not supplied) is required to tighten/loosen the terminals.

Fuse: The amplifier does not have an on-board fuse. A 60-amp fuse should be placed on the power wire within 18" of the battery.

Speaker Connections: The amplifier is equipped with two speaker output harnesses, which connects to the amplifier via 4-pin plugs. The speaker wires should be spliced to the 16-gauge bare wires on the 8" pigtails. To bridge the amplifier, you should use the left front and rear positive and right front and rear negative terminals. The amplifier can also operate in 3-channel mode with the front channels wired in stereo and the rear channels bridged to mono.

Signal Input: The amplifier's Differential Inputs will accept either a line-level or speaker-level input on the Molex-style connector. The included input harnesses each have a 4-pin Molex plug and dual RCAs. Front and rear line-level signals can simply be connected via RCA cables from the source unit to the input harness. For a speaker-level signal, you can cut the RCA connectors from the input harness and splice the wires to the speaker wires of the source unit. When using a speaker-level input signal, the auto turn-on feature is active and the remote turn-on terminal becomes a 12 volt output, which can be used to turn on/off an additional amplifier or other component.

Optional Custom Mounting Kit: The optional RFKHD9813 amplifier installation kit is designed for custom-mounting the TM400X4ad to compatible Harley-Davidson motorcycles. The kit includes a mounting plate, heatsink, and wiring kit. You may qualify for a One-Year Extended Warranty when you install the TM400X4ad with a matching Rockford Fosgate Amplifier Installation Kit.

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Customer Q&A

Q
Crutchfield asked: Why did you buy this?
A
best amp out there 4 harley [ troy  Jan 17, 2019 ]
A
great amp for the money and weatrher proof for polaris ranger [ DAVE  Dec 30, 2018 ]
A
Fitment and quality [ Eric  Dec 30, 2018 ]
A
Marine grade with cooling fan [ brian  Oct 14, 2018 ]
A
I saw this amp in sturgis this year I just had to order one, sounds great. [ joe  Sep 12, 2018 ]
A
Performance [ Craig  Jul 16, 2018 ]
A
size, fit and reviews [ Jeffrey  May 24, 2018 ]
A
for the 4 channel marine feature with 100 rms per channel [ Steve  Nov 29, 2017 ]
A
Based on my research this should be a great product and simple to install. [ K  Nov 04, 2017 ]
SHOW MORESHOW LESS

3 questions already asked

Q
I have a 2019 Kawasaki Vulcan Voyager. I want to add the TM400X4AD to drive 2 6.5 in and 2 5.25 in Polk Audio rated up to 100 RMS. I am keeping the stock radio unit. Will I have cut factory wiring to install this amp? Or does the Fosgate install kit eliminate that for me?
[ Christopher  May 11, 2019 ]
1 answer
A
You will have to modify the stock wiring to install an amp to the stock radio but could leave all the stock wiring in place and just tap into the speaker wire coming off it to get the signal to send to an amp like this one. Here's the tap connectors to use: www.crutchfield.com/p_669PP605/item.html My Bio: https://www.crutchfield.com/bio/Paul
[ Paul  May 26, 2019 ]  Staff
Q
I have a Harley Davidson 2016 street glide. The wiring that comes with this amp include Harley harnesses for quick plug and play? If so, does the wiring come with a bridged harness? Thanks,
[ Keef Kruz  Apr 20, 2018 ]
3 answers
A
every thing you need come with this amp plug and play
[ rickey  May 05, 2018 ]
A
The amp itself does not. You need to purchase the Rockford fosgate rfkhd kit as well. Makes install a breeze. All plug and play. I purchase these along with the saddlebag speaker kit because I was worried the fairing speakers alone wouldn't be loud enough. Boy was I wrong. Now with all 4 speakers it's VERY loud and sounds great
[ shawn  May 02, 2018 ]
A
The amp doesn't come with a Harley specific harness, you will need an install kit for that
[ Alma  May 02, 2018 ]
Q
Does this work with the rfkhd9813 amp kit?
[ Bo  Jan 15, 2016 ]
1 answer
A
Yes, you can use the Rockford Fosgate RFKHD9813 Installation Kit to install this amplifier. My Bio: http://www.crutchfield.com/Support/Bio.aspx?bio=159
[ Larry  Jan 17, 2016 ]  Staff

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