Stereo Integrated Amplifier
Power output: 80 watts per channel into 8Ω (stereo)
Frequency response: 2Hz to 200kHz
Total harmonic distortion: 0.004%
Damping factor: 50
Input sensitivity: 0.17mV (MC), 2.5mV (MM), 150mV (line)
Signal to noise ratio: 68dB (MC), 87dB (MM), 105dB (line)
Output: 150mV (line)
Dimensions: 430 x 150 x 370mm
Price: GBP £300 (1991)
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Reviewed Mar 03rd, 2016 by tjs129
In my opinion this series (500/530/630/700/730/830) are the best of the ES amps - at least on paper; these seem more capable driving difficult loads etc.
These can be found for low prices compared to the 700/730/830es, mine was imported to the UK from Holland for less than £100 - but at this age you need to recap as a matter of course.
Fortunately this is made easy as Sony put a handy access panel underneath the amp & I was able to do this myself with basic skills in around 2 hours.
4*Elna for Audio 10000uf 63v, plus;
2*Nichicon Gold Tune 4700uf 63v in parallel with the above in place of the larger caps on the underside of the PCB
All told the parts cost me about £25 and I couldn't be happier with the results.
This has made all the difference and the amp now sings - especially improving the bass.