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My 4B NRB hums when turned on
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04-13-2016, 06:55 AM
Ghost rider
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Join Date: Sep 2015
Posts: 91
I don't know if this is related to the hum impulses at the startup or the caps being old. Last night I noticed the amp does not sound good when cold. It sounded raspy no bass but once it got good and hot 20 min of playing it sounded wonderful.
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