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

    Misho Myronov Wooden Amp and Wooden preamp, AkitikA GT-102 power amplifier, Valvet E2, Avantgarde Duo XD, McIntosh MC303, First Watt SIT-3, Luxman MQ-300, Job INTegrated, Job 250 Monos, Cary 300B SE, Klipsch RP-160M, Klipsch RB-75, ModWright Ultimate Sony XA-5400ES, ASL Wave monos, Kimber Kables, Siltech, Cardas, Avanti Audio cables, Burmester 948, Linear Tube Audio MZ2, Bricasti M1SE, Naim Supernait 2, Lumin U1 mini, McIntosh MCLK12, Conrad Johnson GAT2, Pass Labs XA25.

  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.
    Main - JVC QL-Y7/Denon Dl-301 Mk II, Gold Note PH-10, Nuprime CDT-8, Auralic Aries G1, Aqua La Voce S3, Kinki Studio EX-M1 , Reynaud Abscissa Jubilee, (2) Rythmik F12SE, Dueland IC's, Triode Wire Labs SC & PC's, Equi=Core 1800, PI Audio Uberbuss, Timbernation rack

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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.
    Sonus Faber Guarneri Memento
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    Furutech GTX-D NCF (R), GTX Wall Plate, 104-D

  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.