Dynaco Stereo 400 Power Amplifier, Recently Serviced - $1,250 (Ridgewood)

Dynaco Stereo 400 Power Amplifier, Recently Serviced 1 thumbnail

make / manufacturer: Dynaco

model name / number: Stereo 400

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Audiofile. This is a classic Dynaco Stereo 400, a high-power solid-state amp from the 1970s. It has just been serviced and tested, and it works properly. Both channels are clean and stable, It’s ready to drive demanding speakers.
Highlights (confirm against your unit):
• About 200W per channel into 8Ω
• Stereo power amp with a straightforward, rugged design
• Recently serviced, with the work done listed below
• Very good cosmetic condition, with light wear consistent with its age
Service performed: recapping, bias and offset adjustment, output transistor checks, cleaning of controls and jacks.
Condition: Very good overall. Fully functional, with no known issues.

Local pickup in Queens, NY

post id: 7975818675

posted: 2026-09-30 20:34

updated: 2026-10-07 22:37

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Dynaco Stereo 400 Power Amplifier, Recently Serviced - electronics -...

Audiofile. This is a classic Dynaco Stereo 400, a high-power solid-state amp from the 1970s. It has just been serviced and tested, and it works properly. Both channels are clean and stable, It’s...