Question about SWR WorkingPro 15 200 Watt 1x15" Bass Combo Amp

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My swr workiongpro 15 suddenly has a very noticable hiss even when the amp is muted, and when I play the high end is more prominent than it was before.

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  • tomgunvordah Sep 15, 2010

    i appreciate the input. let me clarify a few things i maybe failed to mention before.
    All of my EQ settings have not changed in the slightest. The hiss is VERY noticable.
    it happens when i play, but also when the amp is muted, the pickups on my bass are off. there is not signal being sent to the amp.

    A week ago when the amp was muted or my pickups on my bass were off there was no sound coming from the amp. now there is lots. It only sat in my bassment doing nothing in that time



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If you are having the treble/high turned up there will be hiss. This is due to the statistical noise in electronics, including semiconductors. It is a matter of degree. The hiss should be 30 Db below your program level or so.

It is very common for one to change settings and suddenly start to notice hiss or hum at certain settings.

IF YOU CAN, go to a music store and COMPARE the amp to yours at the same setting with NOTHING plugged in. (cables and guitars can generate hiss or other noise themselves).

There is very little in your amp that would have changed to suddenly start generating hiss, so FIRST compare. This will minimize the chance of spending money at a shop to be told it is normal.

Posted on Sep 14, 2010


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