Very nice sounding Receiver after total recap and tuning up. I am amazed at the way these older amps sound and could be mistaken for much more expensive amps. Sounds better than other Marantz and Sansui amps I have worked on. I enjoy this amp more than any of Nad's newer style amps- just sounds better. I use one as my personal amp on my computer.Speaker connectors were updated (see picture) and both filter capacitors (2) and the all the Tone capacitors were replaced with much more musical caps (Nichicon). Lots of punch now in the bass section and VERY accurate highs. Electrolytic capacitors in the signal path upgraded to Elna "Silmic II" audio-grade capacitors and Nichicon KZ premium grade acoustic series. Power supply and most other small electrolytics replaced with Nichicon FG and KG capacitors. Most of the film caps in the under 1uf range replaced. Bypass caps installed. All rotary and push-button switches cleaned with DeOxit G5 Gold. All potentiometers flushed twice with DeOxit FaderLube. Chassis metal cleaned and protectant applied. PS and audio signal path circuit boards carefully cleaned, inspected and any suspect solder connections reflowed. DC offset zeroed and idle current set to factory specs (after one-hour warm-up/stabilization period). Ran for a week with no heat build up or any loss of signal or distortion. Runs cool all day. 30W a channel- able to drive any speakers with ease We are a small restoration and upgrade shop in Md. that specializes in older equipment. We do recapping (replacement of all electrolytic capacitors) usually because caps dry out in as little as 20 years causing flat sound and noise & hum issues. We are certified to repair NAD, Marantz, Sansui, Yamaha, Kenwood and Pioneer units. We do speaker repair, Crossover upgrades, speaker connector upgrades and main driver transistor repairs. Send email with model number for any questions about pricing or equipment upgrades you are considering to have done. We specialize in Crossover rebuilds, especially older Bowers & Wilkens models. Crossover upgrades will bring your older speakers back to life for the same reasons we recap amps and receivers. Reasonable rates, no backlog to wait months for repair.
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