Hi,
Just received 4B-SST2 amp with BP26/MPS2 to be used on my PMC OB1i speakers a week ago. Sound is excellent. However, on my right speaker I can hear a humming sound; it's not loud, not noticeable from my listening position, only when I put my ears close to the speaker. Meanwhile I have done a few experiments to detect the cause:
- only 4B-SST2 connected to speakers -> dead silent
- preamp connected to speakers with all other connections unplugged -> hum on right speaker
- reversing XLR interconnects on preamp side -> hum goes to left speaker
- after previous also reversing XLR interconnects on poweramp side -> hum moves back to right speaker
Hum level is not affected by what is connected to the preamp, source selection or volume level.
Although I can not really hear the hum when listening to music, I would like to get the issue sorted out since everything is brand new and I guess hum should not be there...
Any suggestions are welcome...
Besides that, Merry X-Mas and Happy New Year to all Bryston lovers out there!
Regards,
Stephan1310