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Yamaha DSP-A1

Surround Sound Processor/Amplifier (1998-99)

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Yamaha DSP-A1


Power output: 110 watts per channel into 8Ω (stereo)

Surround output: 110W (front), 110W (center), 110W (rear)

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.005%

Damping factor: 200

Input sensitivity: 2.5mV (MM), 150mV (line)

Signal to noise ratio: 86dB (MM), 96dB (line)

Channel separation: 60dB (MM), 60dB (line)

Output: 150mV (line), 1V (Pre out)

Digital inputs: coaxial, optical

Video Connections: composite, SVHS

Dimensions: 435 x 191 x 473mm

Weight: 23kg


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Reviewed Jun 26th, 2019 by catbus

For its age, its an excellent receiver. Weighs a ton and reminds my of the 70's monsters. I had to resolder the VFD to get the display to work but other than that, no issues.

The amp section is outstanding and outpaces the preamp. I have access to an Audio Precision and get 119dB of dynamic range, 0.003% THD, -1dB at 100kHz using just the amp at full output. The preamp+amp combo can only manage about 96dB of dynamic range in any input mode: optical, analog, or decoder bypass. Still very respectable. I thought that bypassing the ADC+DSP+DAC using the Ext decoder input would improve the specs but it did not. I may have to look for analog preamp section mods to improve that.

Reviewed Oct 25th, 2016 by guest

Best DSP amplifier manufactured today!



jcortopa's picture

re: DSP-A1

What I can say. Works 100% after 16 years without any problem. Only last year, I could use all channels and WOW. Simply astonishing!

re: DSP-A1

One of the Monster Amplifiers in the war between Yamaha and Denon of the 90's. I've had my Gold version since 1995-6 and its been on some pretty extreme journeys but still holds it's own against today's light weights 23kg says it all really.

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