About the Marantz MM7055
Five channels of home theater horsepower
Five channels of home theater horsepower
Even with the advent of 7.2- and 9.2-channel surround sound systems, most home theater lovers still opt for tried-and-true 5.1-channel sound. Recognizing this reality, Marantz built this 5-channel power plant as the primary companion to its AV7005 preamp/processor. You won't have to buy more amp channels than you need, but you can easily add one or more MM7025 2 x 140-watt amplifiers to your setup for more surround channels or multi-room audio.
Behind the MM7055's elegant facade lies a muscular, yet refined current-feedback amplifier design that excels at reproducing both fine musical detail and hair-raising transient peaks.
The MM7055 is comfortable driving high-performance speakers. If your preamp or A/V processor has XLR outputs, you can connect to this amp's XLR inputs and enjoy the superior sound quality they provide.
- 5-channel power amplifier
- 140 watts per channel into 8 ohms (20-20,000 Hz) at 0.08% THD, with 2 channels driven
- frequency response: 8-100,000 Hz (±3 dB)
- signal-to-noise ratio: 105 dB
- one RCA and one XLR input for each channel
- Discrete Current Feedback circuit for accurate, natural sound at all volume levels
- DC trigger input/output
- IR flasher input
- massive power supply for high current and low noise
- gold-plated binding post speaker terminals
- detachable power cord
- weight: 34.6 lbs.
- 17-3/8"W x 7-1/4"H x 16-1/4"D
- warranty: 3 years
- Our 60-day money-back guarantee
- MFR # MM7055
What's in the box:
- 5-Channel power amplifier
- 68" AC power cord
- 44" Remote control cable (single RCA on both ends)
- User guide (English/ French/ Spanish)
- USA Warranty information
- Canadian Warranty information
Marantz MM7055 reviews
Bad Amp. Had for almost a year and can't get it to work properly. Protection circuit trips way too easily. Sometimes I can't watch TV for more than 20 minutes without the protection circuit tripping. The cooling fan is loud enough to hear over the TV show I am watching. The cooling fan changes speed/sound like a bearing is starting to seize. Have sent it to Marantz twice for repair and they tell that there is nothing wrong with it. They even made me pay for the shipping cost the first time, ($65)(Be sure to keep your original box so you can ship it back to them). Bought an expensive surge protector that did not correct the problem. Have switched out everything connected to this amp and nothing has completely cured the problem. I have figured out that it does not like a Bose center speaker or Bose 501s as surround speakers. It will not play at 75% volume for more than an hour without tripping. It also cannot be in any type of typical stereo cabinet as it will overheat. It even trips when there is nothing connected to it! It also can't be next to any other component that produces heat. Don't even think warm thoughts when you are near it as this could cause it to trip! Make sure the electrical connection is easily accessible as you will constantly be unplugging it to reset the protection circuit.
Cons: Protection Circuit Trips ENDLESSLY!
0 of 0 found this helpful
The MM7055 is a pretty stout amplifier for the price. No complaints
Pros: Sound quality Ease of setup and use.
0 of 0 found this helpful
I tried connecting the preout RCA terminals of my new Marantz SR5013 to the XLR socket on my new Marantz MM7055 ampli and zero sound from ant speaker. The XLR switches were all set to unbalanced bc this is an unbalanced connection. When I connected the RCA from the AVR to the RCA of the amp everything worked, except that I'm the proud owner of 5 unbalanced XLR cables.
Pros: Great power
0 of 0 found this helpful
Strong and clean power. Has both balanced and unbalanced (RCA) inputs. Did not test on reference equipment, but this amp made a marked improvement over my previous amp.
Pros: Powerful clean power. Has balanced inputs. Looks great.
Cons: None really.
1 of 1 found this helpful
Exactly what I was expecting. Quality
2 of 2 found this helpful
Plenty O' Power, clean looks, a die hard Marantz fan. Replaces a 20yr. old Marantz amp.
Pros: Hard to find flaws with power delivery. Nice clean look. Easy Install
Cons: none that I know of
3 of 3 found this helpful
I have the marantz MM7055 with the marantz AV7702mkII pre, I have used denon and Yamaha , pioneer systems with my klipsch speakers, all of them sound very nice. But now, I'm in a hole other ball park. All my speakers have a min of 99db sensitivity so without saying I don't need 170 watts. The amp sound so clean that without any music playing I can turn it all the way up and I don't hear any hiss out and othe sounds. But when playing the sound is so warm and natural . I am running it in a 7.1.2 setup, the only non klipsch speaker is my center speaker witch is a old Yamaha folded horn 2 way speaker And now my center sound so find in detail. Without saying all the klipsch speakers sound great also. It does not care what I use on it , anything from the PS4, xbox1 blue ray and the kodi box and even over the air tv shows. They all sound great. I was hesitant on spending money on this kind of system but it's been well worth it I should've done this long ago The amp runs cooler then my krell, rotel and the denon amps I have.
Pros: Great warm sound and runs cools Apps for my iPhone to run the system
Cons: Set one day aside to set it up and learn how to use it
7 of 8 found this helpful
So I bought this because I just wanted too add a amp to my SR7010 and i wanted it to match and I just love the fact that marantz is a AUDIO brand. Well this guy breathed new life into the 5 channels....so much that at reference there is zero distortion and much more clarity to every part of the soundstage. I was STUNNED....for real just speechless. I could not believe the difference. And the build quality is top notch. I feel this can easily compete with McIntosh and I have owned both. If you think your stereo is dead...buy a amp, it takes the load off the AV processor and gives it new life. You won't be disappointed if you are contact me and I'll buy it . They are that good. And also if you want to add even more channels...I.e Atmos you can piggyback the mm7025 with it. I just can't say enough of how good this really is. You will not be disappointed.....Jim ....Cascade Mountains
Pros: Solid build , toroidal power, 5 channels
Cons: Non I have found
9 of 10 found this helpful
Very capable, clean amp for my 5.2 system.
1 of 1 found this helpful
Driving 4 channels, 2 electrostatic ,2 regular speakers. Using in combination with 8807.Plenty of power / well defined sound/ no obvious distortion.
Pros: Great value for money.
2 of 2 found this helpful
going with A/V separates makes a huge difference in sound and power. I came from an Onkyo 807 7.1 receiver with Def Tech Pro Cinema 800's for about 6 years. I upgraded over the holidays and bought the marantz MM7055 with the marantz AV7702mkII pre-pro and it blew my mind away. This amp powers my Definitive Technology BP-9040 with no issues what so ever. I run a 5.4 system no atmos just five speakers and four subs and I am more than pleased on the clean sound and power from my system. I will never look back. five stars ***** go out to Crutchfield for helping me out thank you
Pros: great performance
Cons: didn't break the bank
3 of 3 found this helpful
Bought the 7055 amp to go with my 7701 pre/pro. Excellent sounding combo. A few months in to my amp purchase it started distorting on some of the channels and then just shut down altogether. I was watching and listening to an F1 race. Can't remember which one. Took it to a local authorized Marantz service depot and about a week later a brand new amp showed up on my door step delivered by a big brown van. I was totally surprised. The second amp works great and has for over a year now. I did manage to drive it to clipping one time and the protection circuit shut it down. It is not a 200 watt per channel amp but it is not advertised as being one. The specs are dumb though with a max amp rating of 2 channels driven (what?...it's a 5 channel amp). This setup really sings with Aq Rocket 33 cables and Aerial 5 speakers. If Marantz made a 200watt per channel 5 channel amp, I would buy one in a heartbeat.
Cons: can run out of steam if driven to hard
11 of 11 found this helpful
Nice powered amp. Using to power high frequency with two channels. And low frequency wit the another set. Really cleaned up my sound and furnished improved detail. Don't think I could have gotten the improvement for this reasonable cost.
Pros: Easy to connect Nice sound Good value
Cons: Documentation unclear Standby power switching a bit useless and not worth it
10 of 10 found this helpful
I bought the Marantz MM7055 and the AV7701 as my first foray into separates after only having had receivers in the past. This was intended to be an upgrade from my 16 year old Pioneer Elite 5 channel VSX09TX which was 100 watts/channel X 5 channels. I was really hoping the separate power Amp at 140 watts would provide more power to really push my PSB 8 ohm bookshelf speakers. However I found little discernible difference in power from the Marantz Amp to my old pioneer Elite receiver. In fact the Marantz seemed to provide less power until I went into the settings and boosted the front channels to the max setting. With boosting the levels that the combo is acceptable but far below what I expected. I could get the same performance with a receiver and walk away spending $900 less. I was really looking for power and the Amp just doesn't deliver to expectations. Maybe I expected too much at this price. Actually the combo is not bad and the AV 7701 is an EXCELLENT pre-amp. Set up was a breeze, it converts digital internet music beautifully, everything sounds clear and clean and it's fairly easy and intuitive to figure it out. So this combo might be good for many people especially if movies is your main thing, you've got a relatively small space and are comfortable with modest power. I will be testing out Crutchfield's return policy and will order another Pioneer Elite receiver since I had good success with my previous one. Then I'll add a 200 watt amp just for front Ch.
Pros: Nice Clean Sound
Cons: Under Powered
14 of 25 found this helpful
I have found the 7705 5 channel amp . to be a very good match for my av7005 pre amp !! very happy !!!
1 of 6 found this helpful
Movies' biggest challenge for sound systems seems to be their wide dynamic range. I have owned 75W/ch & 100W/ch systems, and with each step up have found the movie watching experience to be transformed. But no previous systems prepared me for this upgrade. I am a fan of Marantz sound, a slightly warm but very precise and musical output. Marantz somehow manages the precision of digital components without the tiring, metallic effects of many other amps. I wanted the power of this amp for dynamic surges in music and special effects, and I wanted that range without giving up the nuance of dialogue and acoustic music in soundtracks. This amp delivers. Since the size of this amp is significant, and it requires a separate pre-amp, I might add that the styling is also appealing.
Pros: Relaxed, plentiful power reserves. Clean but non-metallic sound. Cool look. DLR and RCA connections.
10 of 13 found this helpful
I use my home theater system every day, so I feel like I get more bang per buck out of the money I spend on it than with other things I spend money on. I replaced a 600 series Onkyo a/v receiver with this Marantz MM7055 amplifier and the Marantz SR7005 preamp. I'm not an audiophile, but one thing I've learned over the years is that watts matter when powering speakers. The 90 watt Onkyo sounded fine for most tv viewing on my 5.1 surround system, but the extra watts as well as the fine engineering of this Marantz system produced a really powerful and enveloping sound I didn't get with the Onkyo 600 series.Blu-ray audio is a real treat on the Marantz system. I did also get to listen to an 800 series Onkyo a/v receiver, and it's extra watts made up a lot of ground sound-wise on the Marantz system for a lot less money. However, I felt like the Marantz had a small advantage in terms of an effortless, non-fatigueing sound at higher volumes over the Onkyo 800 series. The Onkyo 800 series is a steal at its price, but the Marantz system looks and sounds like a work of art, so I decided to take the plunge and have no regrets.
16 of 17 found this helpful
Got this with the 7701, upgrading from a receiver with less power. (Lucked out and got both at open box price.) The amp does seem to match its rated 5 channel power, many amps I've seen or tried recently appear to suffer from inflated power ratings, but not this one. My speakers are pretty efficient, so this drives them to sufficiently brain-rattling volumes for space opera videos, or for listening to music. My test is symphonic music - the more complex and dense the sounds, the more you can show an amp's weaknesses, and this does a fine job, no muddling, every instrument clear, decent imaging. I got this as a price-driven compromise, figuring I'd upgrade it in the future if it wasn't everything I wanted, and that will probably happen in a year or two. I compared this amp to my high end amp (using the 7701 as pre-amp in each case) for stereo audio and the 7055 didn't have as much sound stage depth and breadth, which is what I'd have expected for an amp that's about 1/8 the price. Note it's NOT 1/8 the sound quality - compared to another amp I use in my studio audio system, priced a bit higher than the 7055 and only two channels, the 7055 is a better sounding in terms of detail and imaging. It beats daylights out of the receiver (which cost about the same as just this amp alone) that the Marantz combo replaced, in clarity, slam, and imaging. Night and day. And once you've got five speakers hooked up, 2 speaker imaging isn't so important.
Pros: Good price, honest power, good sound quality five channels
16 of 18 found this helpful
This amp was added between our Marantz SR7005 A/V rcvr and our Polk RTi, CSi, and F/Xi speakers. The home theater was already great, but when we added this amp, it got even better. We had enough power without the amp, but the increased headroom and range does improve the sound in our room. We don't have close neighbors and don't use dynamic volume or dynamic EQ, so we can really enjoy this thing. Holy Hi-Fi, Batman! We watched The Dark Knight Rises and were so impressed, we had to send you this review. And, as always, we appreciate the information on your website, efficient order process, and reliable delivery.
Pros: Matches our other Marantz components. Remote control from the receiver. Outstanding value for the performance increase of our system.
26 of 27 found this helpful
More details on the Marantz MM7055
Features & specs
|Number of Channels||5|
|Power Output per Channel (8 ohms)||140|
|Power Output per Channel (6 ohms)||170|
|Power Output per Channel (4 ohms)||---|
|Bridged Power per Channel||N/A|
|Parts Warranty||3 Years|
|Labor Warranty||3 Years|
|Inputs & Outputs|
|Number of Inputs||5|
Current Feedback: The MM7055 is equipped with a current feedback circuit and uses the same complimentary push-pull circuit as the far more expensive SM-11S1 power amp, providing minimal phase shift and excellent detail resolution. The current/voltage conversion section has a Wilson current mirror circuit to improve circuit stability and high-speed processing.
Instant Power Supply: The final stage of the power amp uses the same LAPT (high efficiency power transistor) as the SM-11S1, offering instant power supply capability. The power section has a large transformer and Marantz original 33,000 μF / 71 V x 2 block condensers to provide a powerful, presence filled sound.
Heat Dissipation: The chimney-shaped heat sink efficiently processes the heat emitted from the amp and a quiet cooling fan removes the heat from the chassis. A high-sensitivity temperature sensor IC is used to control the cooling fan's rotation speed to match the amount of heat generated by the amp.
Auto Standby: With the Auto Standby Mode is turned on this unit will enter standby mode after approximately 30 minutes (continuous) with no input signal.
Speaker Outputs: The five speaker output terminals are binding posts; they are not 5-way posts, but will accept single banana plugs, pin connectors, and bare wire. A plastic collar prevents their use with spade lugs and they're too far apart for dual banana plugs.
Inputs: Each channel has an RCA (unbalanced) and XLR (balanced) input. Separate switches for each channel specifies which is engaged.
Display: A blue indicator on the front panel display and a blue ring around the display light when the power is on; the blue ring around the display can be turned off if you prefer. Separate red indicators on the display light when the protection circuit or Auto Standby feature is engaged.
Remote Power Control: This unit is equipped with a remote power control function; when a compatible Marantz preamp is connected, this unit's power can be switched on and off simultaneously with the preamp. The RCA Remote Control input is connected to the preamp and the Remote Control output can be connected to other compatible Marantz components; CD player, DVD player, Tuner, etc.
Flasher Input: The IR flasher input is useful with universal remote controls; power and mute remote codes are available for the MM7055.
DC Control: The 3.5mm mini-jack input allows the MM7055's power to be controlled by another device (5-15 V). The DC Control output allows the MM7055 to control the power of another compatible device (12 V/44 mA).
- Power: (20 Hz-20 kHz, 0.08% THD, two
channels driven simultaneously)
- 8 Ω: 140 watts x 5
- 6Ω: 170 watts x 5
- Input Sensitivity:
- RCA: 1.2 V/22 kΩ
- XLR: 2.4 V/30 kΩ
- Signal to Noise Ratio: 105 dB
- Power Consumption: 660 watts
- Standby Power: 0.2 watts
- Weight: 34.6 pounds
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