Marantz MM8077 seven channel amplifier teardown
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- Опубликовано: 13 янв 2021
- bored_tech Patreon:
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Designed for the ultimate music and movie surround sound experience, the MM8077 7-channel power amplifier is equipped with the same amplifier technologies that are incorporated in our reference class hi-fi amplifiers, including our unique current feedback discrete power amplifier stage design, which features a high slew rate that provides a wide bandwidth for the utmost enjoyment of today’s high resolution audio formats. All output stages feature identical topology for uniform high quality sound across all channels, and the MM8077 provides the option to choose between balanced (XLR) and unbalanced (RCA) inputs for each channel, for maximum system configuration flexibility. High current, high bandwidth discrete power transistors can handle short term musical bursts with aplomb, even into difficult low impedance speaker loads.
Features:
7 Channels
Current Feedback Topology
Toroidal Power Transformer
High Grade Audio Components
Customised Components
Aluminium extrusion heat sink
Copper plated chassis
Other:
Linear Drive Power Supply
Input buffer amp
Separate Solid Heat Sinks
Power Amp direct
Standby Mode (Auto)
Inputs/Outputs:
7 Balanced In
7 Main-in
Power Amp Direct IN
Gold Plated Cinch
Speaker Terminal: Screw
Number of terminals - 7
Remote Power Control Trigger - In Out
Flasher In
Specifications:
Power Output (8 / 6 Ohm RMS) - 150 W / 180 W
Frequency Response - 10Hz 100kHz (+-3 dB)
Total Harmonic Distortion - 0.03% (20 Hz 20 kHz)
Damping Factor - 100
Input Sensitivity: High level - 1.2 V / 22 kohms
Input Sensitivity: Balanced High level - 2.4 V / 30 kohms
Signal to Noise Ratio: High level - 105 dB
General:
Available colours: Black
Metal Front Panel
Power Consumption 880 Watts
Standby Consumption 0.4 Watts
Auto power off
Detachable Power Cable
Maximum Dimensions (W x H x D) in mm - 440 x 185 x 384
Weight - 18 kg
source: marantz.com 
Наука
This is really an amazing review on the internal components of the MM8077. Thank you very much for giving us this rare opportunity to view the unit's inner components as opposed to the usual review from others.
Thank you!
i HAVE BEEN WAITING FOR SUCH A PRACTICAL REVIEW , MANY tHANKS
Glad it was helpful!
Love your break down and attention to detail.
Very informative. Thanks very much for your efforts.
Regards
Lyndon
Glad you enjoyed it
Excellent job and the video is very much informative all the best and expect more like this 👏👏👏
Request to Marantz engineers and the QA/QC department to look into the assembling quality .
Thanks for watching. If Marantz would care, they would probably contacted me long ago.
Great video ,,,, Awesome video,,,, Wow Extremely enjoyable !!!!!!! I have a Yamaha RX-V 2090 from 1998 I would love to see you take that apart !
Thanks, I will try my best, as I'm quite limited with the budgets. If I get something interesting, I will make a video.
awesome video.
Glad you enjoyed it
amazing review
Glad you enjoyed it
My foam was also damaged exactly like that, but only worse on arrival from Bestbuy. But, thankfully it's worked w no problems for the past couple year.
However, I do find I had to turn the volume up after 1 yr 1/2 to achieve the same volume levels.
I purchased other amps to remove the load from this amp.
I think it won't last many years of heavy use in 7 channels driven mode. Just my opinion from my 2 years of use.
Good job. Here is your algorithm tickler.
Awesome, thank you!
Great job - My Audiolab 8300xp had those same sanken transitors 8 x and nice size power supply and toridal mains transformer 700va but 2-channel and about 35lbs rated at 140watts 8ohms /230 4ohms build quality very good whatyoy call output power pcb is same as driver board correct ?
Amazing. Would love to see some older receivers or amps. Older Onkyo would be cool. Thx certified
I'll try my best.
Well done man. amazing technical breakdown. would love to see your thoughts on Emotiva amps...
Thank you very much for watching!
Спасибо! Очень познавательно!
На здоровье!
Love your break down and attention to detail.
You can count me as a new subscriber.
I love my Marantz 8077 . I do wish it was a little quieter, but am more than pleased with it overall performance over my Emotiva xpa 5. I do wish they had better quality control and don't understand why they don't paint the whole inside of their covers.
It's the same way with my Marantz 8801,8802a and 7705. Penny saved I guess?
Thanks for watching, and many thanks for subscribing to my channel.
Indeed, it sounds fine, but they have to pay more attention on assembly process.
@@boredtech Agree 100%. If you want to be a top tier audio brand, then attention to every detail is part of being top tier .
Might buy this. Do you still recommend it? Open box for $1899
Wonderful Dispose that Amp
Thank you for your advise, but I will keep it.
surprised you would take apart your very expensive amplifier !!!!! its such a densely packed unit i got a chance to see how a seven channel unit works all the circuts involved in your opinion it does sound good a few negative points on quality nice video .*
I thought of purchasing this, after watching this video will never ever think of purchasing it.
Yeah, it's your chose. I'm keeping mine for now.
I haven’t seen the whole video yet, but why don’t you want it?
I have been thinking to buy AV7705 with MM7055 as a package although I was too skeptical about the potentiality and longevity of MM7055 .. this breakdown has put me into a great confusion now .. 😕 Anyways..! You doing great👍
Sorry to disappoint you. Judging by the pictures of MM7055 insides, it's doesn't look very promising.
And off course thank you for watching the video!
So nu true balance in out on Marantz products?
Interesting!
Glad you think so!
klasse!
Class AB or Class D amp??
Excellent job !! I to are disappointed 😿 with the build quality I was looking for one of these for my System but went with a Anthem MCA 525 5 channels amp. Is the 8077 fully differential?.
perfekt
I have this amp, well I have two actually and suddenly it kept turning off and going in to it’s tripped out mode. I don’t understand what is the problem cause but channel 6 when connected to a speaker does not work and trips everything out. It was working ok and the speaker works fine. I had the Kef R300 speaker Bi amped from the adjacent amp channel.. the problem channel is totally dead. Swapping inputs etc still dead. Looks like an expensive repair.. any advice please ..
R.I.P. channel six. I believe you need to find authorised service center. I'm fixing my own equipment when I'm able, but I's only my hobby and I can't give you professional advice.
Good luck with you repair.
Hello @bored_tech :) I would like to kindly ask you to tell me and if possible to share a picture where the fuse of the MM8077 is? I need to replace mine fuse and was searching the internet to find the fuse location.
Thank you very much in advance!
Hai sir am using Marantz SR 8012 AVR with Bic America PL980 tower PL 66 surround PL 28ii center channel which power amplifier to suitable my system, Marantz MM7055 or emotiva basX 7 which one suitable power amplifier sir pls guide me thank you
Thank you for your question. I haven't got to take a close look at Emotiva amps.
Regarding the Marantz, I wouldn't use MM7055. I saw pictures of it's insides and they doesn't look very promising. If you specifically like Marantz, better go for seven channel MM8077. You can use those two extra channels to Bi-Amp your front speakers.
were you able to get it back together for next video?
Of course, I even cleaned all the mess that Marantz factory left inside.
Hello thanks for a great video. I currently have this amp using in the USA on 110v 60hz and will be going back to the Philippines that use a single line 230v 60hz and not possible to get 110v from such system without a step down transformer. Is it possible to convert it to 220-230v? Is so what's involved ?
Oh dear...
You will definitely need to replace the toroidal transformer and possibly the "stand-by PCB".
Probably it would be easier to sell your 110V version and buy 230v version.
Really hope that you will sort this out. Or It's a good excuse to upgrade for a better amplifier :-)
It's a bummer I just got that amp a year ago. Thanks for your feedback
Sir" Which AV Receiver is the best. ONKYO, MARANTZ, DENON, YAMAHA ??
Probably I'm not the best advisor, as I haven't got a chance to listen Onkyo, Denon or Yamaha.
But my thoughts about Marantz you probably heard in my videos. Hopefully I'll be able to teardown one of the Denon receivers in the near future.
I watched a few videos on this yesterday and someone made the comment that you want to buy the one from China vs Vietnam. I wasn't sure if it was you who mentioned it or someone else, but do you know why buying the one from China is better?
My NR1403 is still going strong but I'll not consider Marantz again after this.
great,😁😁
Thank you very much!
Looks easy to service but a repair shop would charge an hourly rate for labor.
That seems to be a refurbished unit sold as new. I'm not surprised that Marantz cut corners in order to save any penny at the detriment of the consumer. These units are sold at premium price and funny enough, the MM8077 got 20% price hike since Masimo acquired Sound United. They are after the money to pay back that $1B purchase...
It look like this is the case. I have a question to AV.COM who sold it to me.
@@boredtechwhat did you find out from them ?
what a POS ... can you break down a Emotiva Made in USA ... Marantz does sound good i will say . I had to open my Emotiva amplifier cause it was shipped out with a screw rolling around in it no big deal but while I was in there I thought it was clean . Like to hear your thoughts and any thoughts on how a USA built stacks up with china or Vietnam. I also took apart my Emotiva XMC-2 and its nothing like a Marantz in that everything is modular , ribbons and wires connecting other boards , not a compounded mess like marantz . I just subscribed
What the hell was the 8th channel for?
Sub?
@@boredtech , As you see on the pcb's of the rca en XLR, it states the MM8003 Marantz amp which was 8 channel. Marantz just used these and didn't solder the 8th one on it. Haha, I didn't look at the full video, now I did. So you discovered it yourself.
Hai bro. I am Indian this transformer output ac volt how much bro.
Try to find the service manual, I'm sure you will find all the information you require there.
@@boredtech thank you bro..
I don’t know how this could be any good without a horizontal gyro tuner wheel. 🤓
I'm not sure what is horizontal gyro tuner wheel 😳
Koshin capacitors?,sounds cheap to me...
Super ❤ from india.i had plan to buy but this is disappointing
Yes, this is sad. Marantz used to be top notch back in the days.
Broken Styrofoam indicates that somebody already opened this product. They grabbed and pulled the Styrofoam from the inside which puts too much stress in the wrong place thus ripping it... Shipping stresses cannot break Styrofoam in this way because the possible outside forces cannot apply enough force to rip the Styrofoam in this way. (Especially if the box isn't overly dented) It was done by a person pulling it out of the box in the wrong way... This product is probably a return or a store model.... Look closely at the tape on the top and bottom of the box. Does it appear reapplied or replaced? Maybe even doubled up... Also you can tell by the stiffness of the 2 side flaps of the box while opening. If stiff its never been open, if loose it's been opened.
I don't have the box anymore, but I definitely remember that styrofoam looked compressed by the impact. That mark was located at the same corner where the transformer is.
The speaker terminals are the same as in Denon pma 720ae. Made in Japan is better than made in China, but made in Vietnam is problem to me. That s the reason why i will not buy the new Marantz model 50 stereo amplifier. They stop using the ELNA and Nichicon capacitors and Bando transformers. Now they are using su scon capacitors and no name transformers.
Why ?????
What?
Imagine paying 1000 € and getting a damaged packet from marantz
An to think marantz use to be made in the USA....
That probably was looong ago...
I am not at all impressed with this internals. I would like stick with my Elite forever 😏
Agree, there are better amplifiers on the market. But I will keep this till better times.
I've seen better component placement on a $3 Chinese walkie talkie. I'm referring to the CPU board. Seems Marantz is going down the toilet sadly.
This is a rip off ... The internals are so average for the amount they ask to pay for it.. I will stick to emotiva and monolith
I'd like to make a teardown video about Emotiva amp. Maybe someone could borrow me one?
@@boredtech why don’t you ask emotiva or mono price directly
Hmmm, that's an idea.
I don t like make break the marantz new only for commently
Sorry, I don't really understand what you mean.
Not impressed at all
In the amp not the video
@@CrashCarson14 Exactly
Well I used to work in a repair shop this looks pretty easy to service but time consuming.