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HELP! - Speaker hissing under all conditions

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  • ehdwuld
    replied
    Re: HELP! - Speaker hissing under all conditions

    If it hisses with the volume down
    I would think something around the output transformer has a bad solder joint
    The hiss is the small arc of power passing over the gap

    That would be where I'd start

    Oh wait
    Does it have an effects loop

    Jump that with a patch cable first

    Leave a comment:


  • waltschwarzkopf
    replied
    Re: HELP! - Speaker hissing under all conditions

    Originally posted by Gtrjunior View Post
    How loud is the hissing?
    Does it make the amp unusable?

    I think with any amp 100% silent is unrealistic.
    Loud enough to be annoying, quite enough to be "unnoticeable" when you're playing.

    Originally posted by Jacew View Post
    It shouldn't make noise volume down.

    Have you tried it in different house?
    Yes, I knew about this when I bought it. Therefore the deal, 100 bucks for it. I hissed at the guy's house and hisses at mine. I tried also different cables and also by removing the center pin (ground) from the power outlet.

    Originally posted by ehdwuld View Post
    Solid state?

    Aint the speaker

    Signal , probably some loose connection or solder joint , leaking through
    I believe it is SS. I was gonna remove the speakers and check for loose connections, but I guess is not needed, right? Where should I check for a loose connection or solder joint?

    Leave a comment:


  • ehdwuld
    replied
    Re: HELP! - Speaker hissing under all conditions

    Solid state?

    Aint the speaker

    Signal , probably some loose connection or solder joint , leaking through

    Leave a comment:


  • Jacew
    replied
    Re: HELP! - Speaker hissing under all conditions

    It shouldn't make noise volume down.

    Have you tried it in different house?

    Leave a comment:


  • Gtrjunior
    replied
    Re: HELP! - Speaker hissing under all conditions

    How loud is the hissing?
    Does it make the amp unusable?

    I think with any amp 100% silent is unrealistic.

    Leave a comment:


  • waltschwarzkopf
    started a topic HELP! - Speaker hissing under all conditions

    HELP! - Speaker hissing under all conditions

    Hi guys,

    I recently acquired a Phil Jones CUB II AG-150 BK amp in good condition. I had been looking for a two channel acoustic amp to us with my stick.

    The amp has many features and all seem to work fine, the only problem is the continuous hissing, not humming. (hissing = hiiiiiiiiiissssss, humming = hummmmmmmm)

    I tried it without any instruments plugged in, all knobs turned to 0, gains, volumes, master, everything and the hissing is still there.

    Any ideas of what the problem could be and how to get rid of it?

    Cheers,
    Walter
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