2. amps-preamps
  3. 1053797858

Does anyone have similar problem with Pass Amp?

I'm just wondering if what i'm experiencing is normal. I have a Pass X250 and Pass X1. When my preamp is muted or turned off I get a slight hum from the right speaker. The hum is only audible when the room is dead silent and my ear is right up against the speaker. Obviously it's not a major issue however i do not hear any home from the left speaker. Is this slight residual hum from right channel only normal? Any input would be appreciated. Thanks
128x128mitchb

Showing 2 responses by mitchb

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mitchb OP
334 posts
 
Thanks for all your responses. I've tried all combinations to isolate the "problem" but have narrowed it down to amp residual noise. If I remove all cables but speaker cables from amp to speakers I get a slight hum from right speaker. I tried swapping speaker cables left to right and right to left and problem remains the same side(right channel). It is not the preamp or any associated cables as I have tried all combinations. I as well isolated all ac cable from each other.My Pass X250 will have a slight residual hum from right channel but it is only noticable if I put my ear right up to the speaker and I was wondering if anyone else has experienced this with there amp and could it be normal? Thanks again
mitchb's avatar
mitchb OP
334 posts
 
THANKS SEAN, BUT I HAVE CONTACTED PASS LABS AND THEY CLAIM IT'S NORMAL. I DON'T KNOW WHAT TO THINK. I PREVIOUSLY OWNED A CLASSE CA201 AS WELL AS A CLASSE CAP150 INTEGRADED AND THEY BOTH DID THE SAME THING.I'VE EXPERIMENTED WITH SWITCHING AND SWAPPING INTERCONNECTS AND POWER CORDS AS WELL AS ISOLATING ALL CORDS AND USING DIFFERENT OUTLETS. PASS CLAIMS IT'S DUE TO THE TRANSFORMER HAVING WIRES GOING TO IT FROM ONE SIDE ONLY AND THAT THEY COULD ELIMINATE THIS VERY SLIGHT HUM BUT AT THE EXPENSE OF THE SONIC QUALITY OF THE AMP.IT REALLY IS ONLY NOTICABLE IF I'M INCHES FROM THE SPEAKER BUT I DON'T KNOW IF THIS IS NORMAL.
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