It could be any manufacturer, but this 55-01 is my first active bass. It seems to have tremendous noise issues. Whether in active or passive mode. That typical buzz until you touch the strings, some pops here and there?? As compared to the quiet no-drama "idle quality" of my old passive bass, I'm finding this unacceptable. I've run searches but aren't finding any definitive answers, there's almost too much info on this site! What remedies are there?? DO you folks "putup with" some white noise at all times?? ( although this is more than anyone could put up with) The "feel"of this 55-01 is the most natural of any 5'er I've tried. The minute my fingers hit the fretboard, I knew that. The low B is most awesome! After around 5hours of play time, I'm getting very comfortable with my new 5'er. But I can't have it throwing 'hissy fits'. As a matter of full disclosure ( as I am a newbie) I did pop the amp cover,adjust the trimpot and dial in the mid eq to 800 hz for the growl I like. Did I muck something up?