Stereo Integrated Amplifier (1988-89)
Power output: 100 watts per channel into 8Ω (stereo)
Frequency response: 1Hz to 150kHz
Total harmonic distortion: 0.003%
Damping factor: 70
Input sensitivity: 0.2mV (MC), 2.5mV (MM), 150mV (line)
Signal to noise ratio: 77dB (MC), 95dB (MM), 108dB (line)
Output: 150mV (line)
Dimensions: 420 x 435 x 162mm
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Reviewed Oct 13th, 2014 by Thol
The score refers to what I regard as the potential I see in this machine.
I bought it used from a Japanese national chain of resellers. It was sold as junk with no assurance or guarantee that it would work. It was missing a big knob, but other than that, it looked in pretty good shape.
The build quality is absolutely outstanding in every respect. It was a machine designed to unseat a niche concept that was then dominated by Sony. So this amp became part of a war for public attention and approbation â€” a situation that benefited the public market. For a short time, serious audio was affordable for more enthusiasts. Moreover, these rivals may have produced their ultimate models before hi-end fell into the eager hands of the boutique market. For that reason, the A-717 should be taken as a serious contender.
I used it on my main line until something went wrong with the phono EQ section. It was detailed and untiring to listen to. I then consigned it to hard duty in the family AV lineup where it performed 10 years of hard service â€” maybe tens of thousands of hours â€” often in very humid Japanese summers â€” albeit with a fan I stuck I on the grill.
For the shear integrity in it's construction, it's non-switching power supply, its carefully designed layout and the pitch-filled, potted transformers ... I rate this as a fascinating, worthy instrument.
I intend to rebuild it in the near future.