Yamaha M-80 Power Amplifier Amplifiers

4.69/5 (16 Reviews)


Product Description

250 watts continuous per channel power amplifier


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Reviews 1 - 5 (16 Reviews Total) | Next 15

User Reviews

Overall Rating:5
Value Rating:5
Submitted by Simon a AudioPhile

Date Reviewed: November 8, 2015

Bottom Line:   
After reading all the good things about Yamaha M-80s, I got a chance to buy a decently priced one on eBay and pre-amped it out to load my front speakers in my Home Theater. It was very impressive, and lived up to all I read in my research.. I felt I had a winner here with a top-notch Amp coupled with a solid A/V receiver. Unfortunately, I had component failure. For a budget conscious audio and home theater enthusiast like myself, venturing into a quality and high-end power amplifier to revitalize a mass market A/V receiver became a shortcut to an upgrade. When baffled by the steep pricing of name brand amps such as Rotel, Carver, Macintosh and Emotiva, I was fascinated by the potential of having a fully restored flag-ship Yamaha amp without breaking my bank. I had my amp restored by LegendaryAmps.com and am extremely happy with this process and highly recommend this approach. Skip even walked me through the finishing process on what was replaced and what was being tested, as well as an understanding of what my newly restored amp was capable of. I understand why he knows so much about Yamaha since he was an engineer of that time. I am again a happy owner of an M-80 and I can now appreciate this amp’s full capabilities, which are amazing. The stage presence is now like being at a live performance. Two recommendations to the previous review: Tracy, send your amp to LegendaryAmps.com; put your review in the right category (this is for M-80s).

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Used product for:   More than 1 year

Duration Product Used:   AudioPhile

Product model year:   Pre 1995



Overall Rating:1
Value Rating:1
Submitted by Tracy a Audio Enthusiast

Date Reviewed: August 21, 2015

Bottom Line:   
Had this company rebuild my MX-1000. When they returned it back it looked very good but when I powered it up the amp shuts off on one side when I run it continuously @ 175 per channel. I sent many questions and concerns to them asking what could possibly be the problem. They called me to say 2 things, I was running too small of speaker wire (Most electrical connoisseurs conclude gage thickness has little or no effect) and that my speakers were the problem. I had the drivers and crossovers tested and they checked out good. In conclusion, I wasted a lot of my hard earned money on an amp that my MX-600U even out performs and this business has demonstrated little or no concern to the problems I have experienced with it. I will send it somewhere else to have it tested and repaired, once that is done I will advertise it and look for a "real" amplifier that actually performs as one should.

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Used product for:   3 Months to 1 year

Duration Product Used:   Audio Enthusiast

Product model year:   Pre 1995



Overall Rating:5
Value Rating:5
Submitted by Jimi a Audio Enthusiast

Date Reviewed: April 25, 2015

Bottom Line:   
Back in business.
I bought one of these amps when I was stationed in West Germany in 85 along with the rest of my system. It was promptly stolen ( with my reel to reel) by the moving crew when I came back to the states. I went many years on just the receiver amp but knew the sound was not the same, but I was young and had other things on my mind . Well two years ago I bought a used M80 off of a auction site and set up a restoration slot with Skip and the crew at Legendary Amps. For the 2K I spent total I couldn't be happier. I wanted to wait a year to see how well the restoration took...it is PHENOMENAL!!! I'm no high brow, wine sipping, silk shirt type. I like my Hard Rock LOUD and CLEAR and I want it to kick my a$$ on demand.. like it used to. Now let me clarify, I sing, I am pitch perfect and have been to over 500 concerts. I know what LIVE music should sound like . The M80 delivers in spades. I will admit I had to add sub-woofers to round out the bottom end where my Sansui SP Z9 II were a little soft and they are run by their own dedicated amp but, that amp takes it orders from the M-80 outputs. That said, every thing that I hear in the concerts is finally being heard again through my system. The first thing that was evident was to have to re-tune my system. The EQ was cut to almost neutral across the bands, and the dynamic range expansion was de-tuned because the amp is doing such a great job of reproducing what is on the media. Yes, I know the new digital stuff is in less need of these adjustments, but my records show an equal amount of tweeking is needed since I've got the M-80 back in the line up. I've heard things on both medias that just plain weren't there before. Amazing amp for the price and it's just gotten better as the it's burned in. I have this thing running at full bore on 4 speakers and it's clear as a bell. Whats more amazing is when it's at a soft level it's reproduction is just as accurate. Nothing is missing, NOTHING. I can only say if you've never heard one of these in action, do so before you spend alot more money on a name. These kicked A$$ back then, and after Legendary gets through with it, it will again. Thanks Skip and the rest of you who worked my old girl over. Shes scaring the neighbors once again! AHH Good times ! Only one thing I would change about the restoration and that is how the cases are restored, I would seriously consider baking the cases in the oven to cure and harden the paint. Mine was a bit soft out of the box. Other than that- I am in your debt...and if my neighbors find out your address- you may get some hate mail. :)

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Used product for:   More than 1 year

Duration Product Used:   Audio Enthusiast

Product model year:   Pre 1995



Overall Rating:5
Value Rating:5
Submitted by Mike a Audio Enthusiast

Date Reviewed: February 21, 2015

Bottom Line:   
This amplifier is quite amazing. It sounds wonderful. If you set it to class A mode, it gets quite hot. So don't, unless you are critically listening. Why? Stereo Review could measure no difference when that mode was selected.

A certain magazine, in the November 1984 edition, had great things to say about this amp, and even better things to say about the pre-amp, the C-80. The power is quite impressive on this thing. When the reviewers tried to test this into a 2-ohm load, their 15-amp power outlet tripped the breaker. They also had difficulty getting anything above .02 percent distortion, when driving past the rated specs. When driving 2-ohm loads, they hit 0.2 percent (4-ohm was 0.01 percent, 8-ohm was 0.025 percent). They were finally able to hit 0.15 percent at 400 watts. Here were the spec results of that bench test:

Frequency Response:
+0, -0.3dB from 5 to 20,000 Hz;
-3dB at 80,000 Hz

1,000-Hz output power at clipping:
332 watts into 8 ohms,
462 watts into 4 ohms,
612 watts into 2 ohms

Dynamic Power output (20 milliseconds duratin):
486 watts into 8 ohms,
787 watts into 4 ohms,
1045 watts into 2 ohms,

Clipping headroom:
1.23dB (8 ohms)
1.46dB (4 ohms)

Maximum distortion:
20-20,000Hz, 250 watts output: 0.006%

Sensitivity: (for 1-watt output):
100mV

Signal-to-noise ratio (referred to 1 watts, A-weighted):
100dB

Slew factor:
Greater than measurement limit of 25

**Specs and article credit goes to the best magazine of all time, Stereo Review, November 1984. Stereo Review is now Sound & Vision Magazine

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Used product for:   1 to 3 months

Duration Product Used:   Audio Enthusiast

Product model year:   Pre 1995



Overall Rating:5
Value Rating:5
Submitted by James J a Audio Enthusiast

Date Reviewed: July 18, 2014

Bottom Line:   
Had the good fortune to buy one of these new in 85, had it stolen a few years later, ( not so good luck) and finally replaced it. I haven't spent tons of time on amps and comparisons but I am pitch perfect and I know what sounds right. This amp delivers in spades. It is certainly capable of reproducing LIVE quality sound , if the rest of your system is up to it. I've attended upwards of 500 live shows, ( not including the local venues) and know what the "bar" is, and have aimed and succeeded to duplicate it in the home environment.
I was using the old receivers amp for year after my M80 got stolen. It did an ok job but certainly wasn't the same. I was still winning blast wars with the bar next door however, after 20 years of going without I purchased another one. It was like night and day. Suddenly all the things that were covered in mud or just plain not there came through again. Over night my EQ, which was doing major duty pumping frequencies that were faded, suddenly was reset to almost no boost at all. The clarity was back and the tight low end - kick you in the chest- punch was back. It was heaven... or so I thought. Having this back in my possession and realizing what I was missing, made me vow never to lose it again. SO off the the master restorers out at Legendary Amps it went. Good thing too because as it worked out- the old girl was running on borrowed time. Between the purchase price and getting it rebuilt was about $1700. A little pricey, but worth every penny. If you've been to the top of the mountain you just can't go back...you just can't. This unit was running on the grace of god when it arrived at Skips facility and the tear down photos showed how good these units were built. Blown chucks out of the mother board and it was STILL RUNNING Strong-- but not for much longer. Thankfully no irreparable harm was done and it was welcomed back with much anticipation. To my surprise the sound now surpassed what I started with, and Skip said it would get better in time as it burned in. Yeah.. ok..Uh Huh. Sure. Well be damned if he wasn't spot on again. I listen to most everything from Blues, Hard Rock, some Pop, Alternative, Fusion, Smooth Jazz. Each one is faithfully reproduced and this amp does it perfectly whether the volume is low background or concert level duplication of AC/DC LIVE at Donnigton. You are THERE. Could not be done without an amp of this quality and performance. Per dollar spent these are the far away best choice. Thanks To Yamaha for building it and Thanks to Legendary Amps for keeping them kicking.

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Used product for:   More than 1 year

Duration Product Used:   Audio Enthusiast

Product model year:   Pre 1995




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