Static from new amp normal?

grumlenz
grumlenz Posts: 27
edited July 2008 in Electronics
Hello, I got an Adcom GFA-5500 for use with my RTI a9's. I turn the amp off when not in use. Is it normal for there to be static seemingly only coming through the left speaker for about the first 5 minutes it's on? The sound comes through as well but there is also a bit of static but it is noticeable, however only through the left speaker. I bought the amp used but was assured it was in working order. It does seem that after the amp "warms up" or after 5 minutes or so there is no more static until I turn it off, it cools down and I use it next time then the static is back. Any help or suggestions are much appreciated. Thanks!

PS, I tried to edit the title to not say new amp, since it is used but it wouldn't let me.
Post edited by grumlenz on
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  • F1nut
    F1nut Posts: 51,997
    edited July 2008
    It's not normal.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • grumlenz
    grumlenz Posts: 27
    edited July 2008
    Any idea on what the cause of this could be?
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  • F1nut
    F1nut Posts: 51,997
    edited July 2008
    Could be any number of things. The only way to know for sure is to have it bench tested. One thing you might do is pop the top (unpluged) and look around for cold solder joints.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • grumlenz
    grumlenz Posts: 27
    edited July 2008
    Keiko wrote: »
    Gremlins grumlenz, Gremlins. :eek: Take it and have it checked.

    Ha, yeah that's the idea in the name. I live in a somewhat small city. Can any electronics repair place test it? The nearest service center listed on their website is about 4 hours away.
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  • heiney9
    heiney9 Posts: 25,497
    edited July 2008
    How do you know it's the amp and not the pre amp or source or cable. In situations like these always to to eliminate other components by isolating them as much as possible.

    The very first thing I would do is swap the (L) channel speaker with the (R) channel speaker to rule out speakers and speaker cable. Next I'd check all my interconnects using the same procedure. I'd also try and use an alternate wall plug and see if that helps.

    Of course if everything is the same except for the amp and it worked fine right before you added the Adcom then maybe it is the amp. I've had a few cheaper cables go bad on me.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Puritan Audio PSM136 Pwr Condtioner & Classic PC's | Legend L600 | Roon Nucleus 1 w/LPS - Tubes add soul!
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  • ND13
    ND13 Posts: 7,601
    edited July 2008
    Sorry, but if I had just bought a NEW amp and it had issues, I'd return it or exchange it.
    "SOME PEOPLE CALL ME MAURICE,
    CAUSE I SPEAK OF THE POMPITIOUS OF LOVE"
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