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Yamaha DSPAX620 - earth dumping?

Discussion in 'AV Receivers & Amplifiers' started by Silva, Apr 9, 2003.

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  1. Silva

    Silva
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    Hi

    My Yamaha amp is popping through my subwoofer when I switch signals on it. Its like a feedback of bass when I switch between prologic, 6 channel sound, etc (all the settings basically)
    I have been told it is an 'earth dump'. Is this a major problem and is it causing damage to my sub (PSW2000 - which I only got repaired at KEF last week)

    Thanks in advance
     
  2. wilber

    wilber
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    Somebody reported this a while back with their 630. Ben from Kef felt it was a problem (something to do with DC contamination or something like that possibly caused by unplugging / plugging in the phono connection while powered up). His advice then was to get it repaired, especially if still under warranty.

    HTH
     
  3. Silva

    Silva
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    So do you think its the amp OR the sub? Called the shop immediatley after trying it at home and they told me it was the amp at fault...
    Seems funny that it is doing it now after getting it repaired, it never did it before...:(
     
  4. wilber

    wilber
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  5. pandrew

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    I had a problem with my 630 where I was getting quite a loud thud from the subwoofer. I think it was Ben from Kef who said it could be the mutting transitors in the amp. I got the amp seen to and found the mutting transitor had blown. No problems since the transitor has been replaced.
     
  6. wilber

    wilber
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    spooky - just linked to your original thread!
     
  7. Silva

    Silva
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    Well, Pandrew you are no doubt correct. I also spoke to a guy at KEF and he told me the same thing, so time to get my amp looked at...

    Cheers people
     

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