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Marantz 4140

Stereo 2 and Quadradial 4 Console Amplifier (1977)

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Marantz 4140


Power output: 70W/ch into 8Ω (stereo), 25W/ch into 8Ω (quadraphonic)

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.3%

Damping factor: 40

Input sensitivity: 2mV (MM), 150mV (line)

Dimensions: 15-3/8 x 5-3/4 x 14-3/8 inches

Weight: 33lbs


service manual   English -

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switchbacker's picture

re: 4140

Has anyone replaced the Volume Control on a Marantz 4140
or any other Marantz Quadraphonic Amplifier?
Where could I buy one of these?
Thank You

re: 4140

If you still need an original volume control, I have a used one that I'll sell as-is (but good) for $40 obo, NO REFUNDS. It should be thoroughly cleaned with DE-Oxit ONLY. I bought it for my 4140 from a reliable salvage dealer on Ebay, and didn't need it. Do you need anything else (knobs, pots etc.)?

I'm online 2-3 times/week


re: 4140

If you (or anyone else) still happen to have a original volume pot for a 4140 for sale, please let me know, I am looking for one. Thanks!

This website is not affiliated with or sponsored by Marantz. To purchase 4140 spares or accessories, please contact the company via their website or visit an authorised retailer.