Proton D1200 intermittent channel dropping off.

honestabe316
honestabe316 Posts: 2
edited February 2014 in Troubleshooting
Hi,

I have a proton D1200 power amp which sounds beautiful. It has an issue as of late and seems to be a little worse since I bought my new preamp. Previously I was using my Kyocera r-611 receiver as a preamp through the pre-out. The left channel and occasionally the right will drop out intermittently every couple of hours. It seems to do it more when I am running the amp at very low volumes and also it seems to happen with different sources. It rarely happens when I use the cd player, but more often with the tuner. It is remedied quickly by boosting the volume quickly up and down. This brings the channel back and I am good to go for a few more hours...volume definitely affects it as higher volumes equal less intermittent. This sounds like a bad relay does it not? If it is, I have the proton relay part number but there is no way that Proton is going to still have this in stock. They are limited to televisions at this time and seem to not be in the hifi biz anymore. Would I be able to find a replacement relay for the proton? This amplifier is amazing and I want to keep it forever.

Thanks

Scott
Post edited by honestabe316 on
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Comments

  • [Deleted User]
    [Deleted User] Posts: 7,658
    edited February 2014
    Hello Dave,
    Welcome to Polk's forum. Probably the first thing to do is make sure the problem is with the amplifier. Try reversing the cables that go from the preamp to the power amp at the amp, if possible. Then see if the problem remains in the same channel or changes channels.
    Regards, Ken
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  • bikezappa
    bikezappa Posts: 2,463
    edited February 2014
    Wiggle each RCA connector and see if that causes the dropouts. Try wiggling the volume control to cause a dropout.

    Finally try light tapping on the equipment.
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  • honestabe316
    honestabe316 Posts: 2
    edited February 2014
    Thanks for the replies. The interconnects are hooked up correctly. Once the channel drops off either wiggling the colume or tapping the amp brings the signal back.....
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  • agfrost
    agfrost Posts: 2,430
    edited February 2014
    Decent chance it's a speaker relay. They can be cleaned with dry abrasive if you're handy, or can be replaced if you're comfortable taking a soldering iron.
    Problem referenced here: http://www.polkaudio.com/forums/showthread.php?47337-NAD-amp-problem-solution-found

    Sound like what you're experiencing?
    Jay
    SDA 2BTL * Musical Fidelity A5cr amp * Oppo BDP-93 * Modded Adcom GDA-600 DAC * Rythmik F8 (x2)
    Micro Seiki DQ-50 * Hagerman Cornet 2 Phono * A hodgepodge of cabling * Belkin PF60
    Preamp rotation: Krell KSL (SCompRacer recapped) * Manley Shrimp * PS Audio 5.0
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