Question about Yamaha DSP-AX1 10-Channel Amplifier

3 Answers

Speaker Loss Of Sound

After an initial period of no probelms the left speaker channel sound deteriorates and then eventually there is no sound at all. I have had this checked 3 times by the service centre - each time they return it working perfectly no being able to reproduce the problem even though they witnessed this in my home environment. I believe this may be static related and the amp is not earthed as I live in Central europe and this is the standard wiring - unlike the UK that has an earth wire as standard in the power lead. This may explain that when earthed in the test environment that the problem cannot be replicated. I have switched the left and right speakers to ensure it is not them or the cables. The left speaker and cable performed perfectly on the right channel output and the previously functioning right speaker failed to work when on the left output channel. I have a DVD and CD player attached and a sub woofer powered through the amp.

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  • 4 more comments 
  • Anonymous Dec 17, 2007

    same problem

  • lowlmn Jan 03, 2008

    yep same,its so annoying

  • shingPoon Oct 11, 2008

    My left main and rear right speaker got no sound. I test the speakers and they are working fine on other channel.
    Is it expensive to repaire?

    Thanks,

    -Shing-
    shing@hk.com


  • lory40 Mar 22, 2009

    I think I have the same problem



    The right canal has only 3milivolt output (A and B)

    And all other channels have 30milivolt output

  • andybush Apr 14, 2009

    Dear Gentlement,

    Thank you very much for the help. Had the same with the center channel. After the solution with the cables - perfect.

  • Bixbe May 11, 2010

    I have drop outs from the right main speaker using the analog (6CH inputs) for my Blu Ray and HDDVD players. The amp is built in the wall so I need a durable solution for this. How are the pre-out/inputs related to the 6CH input? Or is it the main right RCA cable 6CH input that I must insert and extract? 

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Works great after this solution with the cables.

Thanks

Posted on Jan 22, 2009

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  • 236 Answers

If that is the remedy, injecting signals to trigger... then probably it is a defective analog IC switch.

Posted on Mar 19, 2008

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The problems lies with the switch relays in the pre-outs for the both the main and center channels. The fix, so to speak is to obtain a simple composite cable and while the amp is on (muted) insert and extract the cable from the pre-out/inputs, do this a few time for each channel and then check levels for each speaker. This is a know defect with this unit and it's really unfortunate that Yamaha never owned up to it.

Posted on Feb 03, 2007

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Posted on Jan 02, 2017

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