Yamaha M-2 Vintage Amplifier With VU Meters - Serviced and Upgraded

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Beautifully constructed vintage amplifier from Yamaha's 1980's golden age when their gear was still being built in Japan.

Built like a tank utilizing high quality components and machinework. Super cool VU meters with TWENTY LED segments per channel.

Gold plated RCA jacks and high quality speaker binding posts that weren't typical of this time period.

Fully serviced and ready for another 30 years of enjoyment.

High-quality vintage components from this era are sure to become collector pieces over the next few years.

Checkout our matching period correct Yamaha preamp and tuner (click here) if you'd like to put together a complete system (which we highly recommend!).

Service Notes:
All button lamps have been converted to bright white LED's, offering extended lamp life and a brighter appearance. This modification does change the color of the buttons from stock. They appear white and teal/green rather than the original amber and forest green.

This unit also underwent an alignment, bias, DC offset, and meter calibration. All adjustments have all be made to official service manual spec.

Our Testing Process for Amplifiers (Solid State) at SkyFi:

We start with a visual inspection of all internal components to make sure there are no signs of stress or aging. Capacitors are checked for telltale sings of bulging or leaking, resistors are checked for signs of overheating or cracking, and transistors are checked for signs of stress or damage.

We then power up the unit carefully and run a simple 1k sine wave while monitoring the output on an oscilloscope for signs of distortion or noise. Finally, we run the amplifier to its full rated power into the appropriate resistive load provided by our Sencore amplifier tester. If there is an issue, it will usually be noticeable at this point. If everything reads clean, we will often test for THD (Total Harmonic Distortion) measured by our Keithley distortion meter, and compare it against the original manufacturers specifications. The amplifier then remains powered on to "burn in" on our test bench for a few hours to make sure there are no heat related issues. If there are balanced inputs available they will be also be tested.

Please click here for detailed specifics regarding our specialized packing process that separates us from the rest.