Question about Parasound HCA-855A 5-Channel Amplifier

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Noisy transformer My 855a hums and Parasound wants $200 for a replacement, just parts! Any ideas where I can get a repalcement for less or quiet this one?

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  • Anonymous Mar 30, 2009

    Same here

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Normally, power transformers don't hum loudly unless there is a problem in power supply circuit. If all seems normally operational, the problem may be simply anchor screws that hold transformer to frame may be loose. Try tightening them

Posted on Apr 29, 2008

  • kenwood61 Jan 21, 2011

    I know this is an old post, but for anyone else looking for an answer to this . . . I talked to Richard Schram about the vibration hum/buzz in my HCA 1500A that is coming from the toroid transformer. It is possible that the steel laminations have loosened and what you are hearing are sympathetic vibrations. I put a plastic tie wrap around the side of the transformer and tightened enough that it can't slip off, but not to apply too much pressure. Seems to have removed 95% of the sound. At least enough to not get in the way of musical enjoyment.

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