Accuphase E 550 buzzing noise.
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  1. #1
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    Accuphase E 550 buzzing noise.

    Hello to everyone - i boutch this used in mint condition - all runs perfectly except one thing - i hear slightly buzzing noise from inside of accuphase, - i think it's transformer making this noise, - anybody here with integrated's or other accu amp's - have the same ?

    Or i must to find technician?

    Thank's/

    Best Regards.

    Eugeniy.

  2. #2
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    Re: Accuphase E 550 buzzing noise.

    Welcome to the Forum Eugeniy.

    I have an Accuphase E-470 and there is no noice at all.
    Flemming

  3. #3
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    Re: Accuphase E 550 buzzing noise.

    Quote Originally Posted by FDPDK View Post
    Welcome to the Forum Eugeniy.

    I have an Accuphase E-470 and there is no noice at all.
    Hello dear sir, thank you for the answer, maybe somebody with class A amp comment this.

  4. #4
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    Re: Accuphase E 550 buzzing noise.

    Dear Eugeniy,

    I have had amps in the past where the transformer did hum. It was because I had DC on my line and that made the transformers hum and vibrate. The way to stop it is to use a DC filter like a PS Audio Humbuster III or an Emotiva CMX-2.

    https://emotiva.com/products/cmx-2


    There are more sophisticated units but this will work.
    Joe

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  5. #5
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    Re: Accuphase E 550 buzzing noise.

    Another thought is whether or not there are any dimmers on the same circuit.
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  6. #6
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    Re: Accuphase E 550 buzzing noise.

    When I had an E600 for demo, there was no noise.

    My C3850 and A200 were dead silent as well.
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  7. #7
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    Re: Accuphase E 550 buzzing noise.

    Ok, Biggest thank's to all that answer, i try'd isolate a problem, turn off all my automatical switchers and leave only dedicated line for amp. Hum is there..

    I dont think it's dc. Becouse i off all the ac lines in my home, except ac for amp.