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Marantz MM7025

Stereo power amplifier

Item # 642MM7025

Expect to hear tighter, weightier bass, and wider dynamic swings that bring you closer to the sound of live music.

Expect to hear tighter, weightier bass, and wider dynamic swings that bring you closer to the sound of live music.

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Item # 642MM7025

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About the Marantz MM7025

Massive power for a wide range of audio applications

Connect this 2 x 140-watt beast to the preamp outputs of a receiver or a wireless music player such as the the Sonos ZP90. Add a pair of speakers that can handle the high power, and get ready for a breathtaking sonic thrill ride.

Massive power for a wide range of audio applications

Connect this 2 x 140-watt beast to the preamp outputs of a receiver or a wireless music player such as the the Sonos ZP90. Add a pair of speakers that can handle the high power, and get ready for a breathtaking sonic thrill ride.

Use the MM7025 in your main listening room to drive your primary speakers. Expect to hear tighter, weightier bass, and wider dynamic swings that bring you closer to the sound of live music. (If your speakers can be biamped, this Marantz makes a superb choice for driving the low-frequency half of your system.)

Audiophiles using a preamp or A/V processor with XLR outputs can connect to this amp's XLR inputs and take advantage of the superior sound quality they provide. You could also use this amp to power a second zone. If you're using a speaker selector to divide the second-zone power among multiple rooms, don't worry. There's plenty of juice here to go around.

The MM7025's current-feedback amplifier design provides for nuanced reproduction of fine musical detail and plenty of sonic muscle to support chest-thumping transient peaks. HDAM-SA3 circuits provide high-speed signal response for precise sound.


Product highlights:

  • 2-channel power amplifier
  • 140 watts x 2 into 8 ohms (20-20 kHz at 0.08% THD); 170 watts x 2 into 6 ohms
  • frequency response: 8-100,000 Hz (±3 dB)
  • signal-to-noise ratio: 105 dB
  • Discrete Current Feedback circuit for accurate, natural sound at all volume levels
  • oversized power transformer for high current levels
  • one RCA and one XLR input for each channel
  • DC trigger input/output
  • IR flasher input
  • gold-plated binding post speaker terminals
  • detachable power cord
  • 17-3/8"W x 5"H x 15"D
  • weight: 23.8 lbs.
  • warranty: 3 years
  • Our 60-day money-back guarantee
  • MFR # MM7025

What's in the box:

  • 2-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

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More details on the Marantz MM7025

Stacey B.

Product Research


Current Feedback: The MM7025 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 15,000 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 each side of 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 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: There are RCA (unbalanced) and XLR (balanced) inputs. Separate switches for the left and right channels specify which is engaged; useful if you're not using the MM7025 as a stereo amp.

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 MM7025.

DC Control: The 3.5mm mini-jack input allows the MM7025's power to be controlled by another device (5-15 V). The DC Control output allows the MM7025 to control the power of another compatible device (12 V/44 mA).


  • Amplifier Type: Class AB
  • Power: (20 Hz-20 kHz, 0.08% THD, both channels driven)
    • 8 Ω: 140 watts x 2
    • 6 Ω: 170 watts x 2
  • Input Sensitivity:
    • RCA: 1.2 V/22 kΩ
    • XLR: 2.4 V/30 kΩ
  • Signal to Noise Ratio: 105 dB
  • Power Consumption: 330 watts
  • Standby Power: 0.2 watts
  • Weight: 23.8 pounds

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Customer Q&A

Crutchfield asked: Why did you buy this?
Need something to power my big Cerwin Vega VE15's. I know I know. The audio snobs can keep their opinions about Cerwin Vega. I've been rocking Vegas since the 80's. [ Eric  Oct 11, 2019 ]
I needed more power to help my struggling receiver. I owned a Marantz 2270 receiver back in the 70's and was very impressed with the brand. [ Joseph  Aug 16, 2019 ]
I have read great reviews from others who have this product and how well designed it is and what it is capable of doing in a stereo system. This actually will be my first marantz product and I'm very excited about adding it to my system. Now I will buy the marantz 7012 receiver to complete my system. [ CASEY  Oct 14, 2018 ]
Good compliment to my Marantz AV7703 for stereo listening. [ Scott  May 15, 2018 ]
I have one of these already and just love it. I need it to power the rear speakers [ Lynn  Apr 12, 2018 ]
To add a bit of muscle to my Marantz NR1606 AV receiver via the front channel pre-outs [ stickywicked447  Dec 29, 2017 ]
I asked the Tech to suggest a comparable Amp to bi-wire and run my front 2 floor speakers. [ John  Nov 17, 2017 ]
Purchased the Marantz 6011 Receiver recently as well as new Polk Audio S60 Towers, The 6011 is nice but I want to see what some more power will do for the S60's so I plan to add this to run just for my Front Speakers the S60's, leaving the rest of the 6011's power for my other speakers and go to a 7.2.4 setup down the road. [ ANDREW  Jul 27, 2017 ]
To drive sub bass [ KIYOHIRO  May 12, 2017 ]
Required a little more power to front main towers in a 5.1 system. This fit the bill nicely. [ STEPHEN  May 08, 2017 ]
Matches my system [ Rod  Mar 23, 2017 ]
Needed a big amp to go with Marantz1506 I just received this amp will be a good match [ D  Mar 04, 2017 ]
Wanted to add additional Marantz amplification for existing 9.2 receiver to upgrade to 11.2 [ mwbdcrown  Aug 22, 2016 ]
Dexter recommended this as a good pair to my Denon AVR-X7200WA for the 2ch external powered amp needed for 11.1 surround. The power match-up seemed appropriate, and Marantz is another brand for quality. Dexter's Bio: [ Charles  Aug 16, 2016 ]
After researching reviews, testimonials, and listening for myself, I felt this would give me the best bang for my bucks [ Michael  May 24, 2016 ]
Feedback [ Peter  Apr 06, 2016 ]
POWER!! [ Gary  Dec 19, 2015 ]

11 questions already asked

Is there significant improvement in sound quality if the MM7025 amp is connected to the Marantz SR7011 for music w/Klipsch Chorus II speakers listening at low-mid volume levels?
[ Strat  Sep 14, 2019 ]
2 answers
[ Arnold K  Oct 10, 2019 ]
Mine is connected to a Marantz SR 7010 and the sound Is outstanding
[ ROBERT  Oct 09, 2019 ]
Have a Marantz 2238b and purchased a Marantz 140 watt per channel to power my original Klipsh Heresys. Can I plug the power amp into one of the AC receptors in back of 2238b?
[ Mark  Jun 13, 2019 ]
2 answers
I wouldn't recommend it. The best way to power any amplifiers is with a power conditioner, especially from power spikes that do happen.
[ CASEY  Jun 20, 2019 ]
If I remember correctly, the Marantz 2238B receptor doesn't have a ground do the plug won't fit. Given the older circuitry I wouldn't chance it anyway.
[ LOUIS  Jun 19, 2019 ]
Can I run 2 sets of speakers with this amp?
[ Rodney  Nov 25, 2017 ]
1 answer
You can as long as the speakers have a 12 ohm or higher impedence. If they are speakers with a lower impedence, then can only power one set. My Bio:
[ Paul  Nov 30, 2017 ]  Staff
This isn't explicitly rated for 4-Ohm speakers, but from what I've been told this will still work with 4-Ohm speakers provided it has proper ventilation. Has anyone used this with 4-Ohm speakers?
[ Blake  Aug 03, 2017 ]
2 answers
I have used it with both 4ohm and 5ohm speakers...also depends on receiver, or pre-amp you are using it with.
[ ANDREW  Jul 29, 2018 ]
Since we haven't received any answers from other customers on your question at this time, I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. While it's true the Marantz MM7025 amp should work with 4-ohm speakers (under the right conditions), our Advisors can help determine whether this would be the right choice to work in your specific system. Thanks!
[ Larry  Aug 08, 2017 ]  Staff
Hello! Im wondering if could connect this one directly to a Marantz Na 6005? It says that the Na "lacks preamp outputs" what does this mean? Best regards Bjørn
[ Audiobully  Aug 02, 2017 ]
1 answer
I think not. You would have to have some sort of output to connect to a preamp before linking to the power amp. I f there is an output option on the NA I would assume you could link to the power amp via an auxlliary input.
[ TIMOTHY  Aug 02, 2017 ]
Can you use this amp as mono to each front tower speaker?
[ numanr  Oct 12, 2016 ]
4 answers
Yes you it can send mono to each front tower speaker as long as the input device hooked up to the amp is sending mono to both speakers. Basically it is a pass-thru from input device to speaker so whatever signal is sent to the right speaker is what is amplified to the right speaker. Whatever signal is sent to the left speaker is what is amplified to the left speaker. The only change to the signals sent is that they are amplified, (made louder), so that the input device doesn't have to have its own amplifiers for each channel. Hope that this answers the question to your satisfaction, and helps. ;o)
[ Charles  Oct 13, 2016 ]
I'm not quite sure what you mean. If you want to only connect one speaker to the amp, vice two, then yes is the answer. An amp is a pretty dump device. It merely amplifies the sound, and maybe cleans up the sinewave of the output from your receiver or preamp device. I have a preamp and eight speakers (no center channel). I use the 7025 for my front left and right. Then another 7 channel amp for the other six surround speakers.
[ Todd  Oct 13, 2016 ]
[ Nancy  Oct 13, 2016 ]
Yes you can. I would check your speaker power maxium as you dont want to overpower them and risk damage. Your tuner/reciever will need to have enough pre out terminals to send signal to two amps.
[ Lynn  Oct 13, 2016 ]
Will this amplifier work with the Yamaha R-S700 receiver?
[ Michael  Aug 02, 2016 ]
4 answers
I have components (DVD player, satellite radio and am old cassette tape player) hooked into an NAD pre-amp/tuner powered by the Marantz. Does your receiver have an integral amplifier? if so that may be a problem. If the receiver puts out an un-amplified signal I would think it would
[ Patricia  Aug 05, 2016 ]
This is a question for the experts at Crutchfield. As per the "about tech" Website, "...the R-S700 (includes a) multizone/multi-source feature, which allows a listener in Zone 2 to hear a different source than the main room. The receiver's non-powered Zone 2 output requires an amp and two speakers in the second zone. It comes with a separate Zone 2 remote control to operate the receiver from another room. Note: Multizone operation requires running speaker wires and IR (infrared remote) control wires from Zone 1 to Zone 2, which may require professional installation." The Marantz MM7025 will provide very good to excellent power amplification for zone two. Although it has a remote control connection via an RCA plug cable, the Yamaha uses IR. Given this, the remote operation may not work. Bill M.
[ WILLIAM R  Aug 04, 2016 ]
That all depends. Please follow the link above, and see if this will help answer your question. The MM7025 is a two channel amp. The Yamaha R-S700 appears to be a 2 or 4 channel receiver, depending on whether your speakers are 4, 6 or 8 ohms rated. I'm not quite sure that you will gain much with the addition of the MM7025, if all you are using only 2 channels. Best to check the web site at audioholics(dot)com for best practices.
[ Todd  Aug 03, 2016 ]
If your amp has main out and in yes.other factors are speakers. Over all very satisfied with my purchase very solid amp. Clear with good punch. Component compatibility will always be a factor. Your system for me can only be as good as your speakers
[ Robert  Aug 03, 2016 ]
hello I have a sony str-dn1050 and was told this is nice amp ,I would like to buy but want to make sure it will work,i have only two polk speakers as of now and have it bi-amped , had 1 guy say I would need a receiver with pre-amp outputs and had another guy say it will work on zone 2? so im looking for a third opinion? and lets say it does work will I still b able to use all the features of the receiver? thanks for doing the homework on this,i don't want to have to return it..oh and my sony runs on 6 olms if this makes any diff? but ty mark
[ mark  May 04, 2015 ]
2 answers
To bi-amp with that Sony model, you will want to use the Sony to power the high frequency section of your Polks and then connect the Marantz to the zone 2 / "B" speaker outputs of the receiver, to drive the woofers. You will have to go into the set-up menu and select "A+B" speakers. Sony rates the receiver into 6 Ohm loads. All that means is you should be confident that it will drive speakers that are rated at 6 Ohms (or higher) safely. Only analog signals will be output from the "zone 2 / B speaker" output. That should not be an issue.
[ JAMES  May 05, 2015 ]
Hi Mark, Sorry but I can't help. I actually returned the receiver and never opened it. I was in the middle of painting and remodeling and figured it wasn't a good time to be messing around with this. Thanks, Pat
[ PATRICK E  May 04, 2015 ]
I see that the instructions say this amp goes into standby after 30 minutes of not sensing input signal, but will it turn on automatically when it senses signal again? basically, does this amp have an signal sensing auto on feature?
[ shkalata  Jul 02, 2014 ]
5 answers
Yes, but you don't have to use it. It's purely optional. It also has a 12V trigger, which works great for me.
[ JAMES  Jul 04, 2014 ]
So frustrating it has no auto on feature... I have 5 airplay zones in my home and need and amps I can leave installed in a cabinet that turn on and off automatically when signal is sensed from an Airport Express. I have some older Sonance amps that do that now, but 2 have failed and I need to start replacing them with something better.
[ shkalata  Jul 04, 2014 ]
My system shuts down after 30 minutes (phone call with mother-in-law) and did not restart automatically.
[ Pat  Jul 04, 2014 ]
I have the mm7025 hooked up to a Marantz receiver there is a remote control cable as well as signal cables to the amp from the receiver. When I turn the receiver on the amp comes on .5 sec delay. the amp stays on as long as the receiver is on. It does go into standby mode when there is no audio signal present, but when in standby the ON blue light stays lit and the fan shuts down. The Amp is truly amazing as far as construction, twice the amp for the money compared to other brands..
[ GEOFFREY B  Jul 03, 2014 ]
I have seen no evidence that it has an auto on feature. My answer would be no to your specific question. However, it does have the capability to install a "trigger", which detects that another device has been turned on. For instance, I have a series of amps, only have to turn on one, the rest are automatically triggered.
[ VINCENT JAME  Jul 03, 2014 ]
I am going to us this with a older model sony reciver M#strde885 with a subwoffer and a pair of klips towers I all ready get a 100 watts per channel but am looking to get clean and clear sound ,my question is will the amp make much of a difference? Dan C
[ D  Feb 05, 2014 ]
1 answer
It depends on how hard you push the Klipsch now and how stout a 100W the Sony receiver is. Most A/V receivers, especially towards the lower end of the market, can't deliver anything like their rated power to all channels simultaneously. The Klipsch should be a relatively easy load, though, so unless you're really rockin', your Sony receiver should have enough power to drive them easily -for stereo music that is. If you like to crank up action flicks, putting an amp like the Marantz on the front channels will really lighten the load on your receiver. And even for stereo music listening, if you like the bass and like to listen at life-like levels, the bigger, beefier amp will definitely do a better job.
[ JAMES  Feb 06, 2014 ]
Does this amplifier have a cooling fan? If so, how loud is the fan? I may be sitting within 6 feet of the amplifier. I don't want to hear the fan during the quiet intervals.
[ Larry Sacks  Jan 11, 2014 ]
3 answers
Appreciate the clear and interesting answer. Thank you for taking the time to reply and to educate me.
[ Larry Sacks  Jan 13, 2014 ]
Have never heard the fan. It does have one.
[ NORMAN T  Jan 11, 2014 ]
It does have a cooling fan. It's speed is matched to the amount of heat that is being generated. I have had this amp for over a year, use it almost daily and have never heard the fan run. This amp has a very low operating temperature.
[ KEN  Jan 11, 2014 ]

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