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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.

Posted by Graham Hayward on

  • 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?


    [email protected]

  • 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.


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



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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Related Questions:


Left speaker not working, system crackles if left side is active, alright when left side shut down.

Get a meter and check the resistance on the speaker. Looks like a speaker may be blown but with the description of the crackle noise from the slide controls you might have a bad pot in the unit or the pot has come loose from the board. This could explain why the speaker blew out

Left channel will not play

Firstly try swopping over the left speaker to the right channel . If still no sound then either the speaker cable will have a break in it & need replaced or the actual speaker will be open circuit. If you get sound from the speaker on this channel then the the speaker is ok. Check your PC's audio set up... Go to Control Panel/ Sounds & Audio devices/ In volume Tab, click in Device volume area... Advanced & then check the Balance settings are not set to one end.

Left speaker gives no sound

There could already be a problem with the speaker jack, if only one channel is consistently giving no sound on your system.

Try turning the male (connected to speaker wire) jack and you might hear a static crackle while doing this. If you get both channels to produce sound this way, you already have a failing audio jack, and may need replacement later on.

Hope this helps.

Left Channel Not Working.

Has it ever worked?

Try this - connect one pair of its speaker wires at a time and test it. Watch the polarity.

• Make sure all cube speaker arrays are connected to the proper terminals according to their
position in your room.
• Check to be sure all wires are connected to your surround receiver with the proper polarity
(+ to + and – to – wires). Incorrect wiring can result in a total loss of module output.
• Correct any wiring problems before you plug in your receiver and turn it on.

How do you know the receiver's Left channel isn't the fault? Sounds like a source issue.

Scratching sound in speaker conected to left channel

invert the speaker cables if the problem went to right speaker you will find a problem in your left speaker(cable or speaker)-if not you will have a problem in your amp itself.


Problem with sound

Its easy. Jus from task bar click on that Speaker Icon of sound. In that you can select the left channel, right channel or both! Keep the pointer in middle and you will get sound in both the channels! Enjoy

No sound from left rear surround speaker

i think it would probably be somthing inside the channel???

Sound not coming from left side surround sound speaker or my right side front speaker

it is highly likely that you're TV is outputting mono sound, hence the left channel only. check your physical connections to the TV and the balance / channel volume on the television as well.

Both left and right speakers play audio for right speaker

I think you mean the left channel is out but when you use test tone, the sound comes from left and right channels through the right channel speaker. If this is case, the switching IC is malfuncting. Unit needs service
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