Sick and tired of hum-please read


JBL 4345's
Canary 500 monoblocks using emission lab 300B tubes
PS Audio MK ll Dac
Dish Network VIP 612 DVR
Dedicated 120 line from panel

You name it, I've tried it. I have a low level 60hz hum that I for some crazy reason am unable to get rid of.

Lifting the ground, power re-generators, cable changes, equipment to equipment grounding, Satellite new cable and grounding and turning off the whole house except my music room has not resolved. The only explanation I can conclude is that 300B tube amps and very high efficiency speakers will always produce hum. Drives me crazy. This subject has been beaten to death but if any of you guys has any out of the box ideas other than the obvious, I would be interested to hear. Thank you in advance
invstbiker

Showing 1 response by atmasphere

Invstbiker, if I were you I would start by disconnecting the preamp from the amp and see if the amp hums on its own.

300bs don't make a lot of power, so they have to be on efficient speakers. For this reason, they have to be hum-free. If, not, I would return it to the manufacturer for repair, unless there is a hum balanced control that simply needs adjustment.

OTOH if the system is quiet after this test, the next step is to disconnect all the inputs to the preamp and see if the preamp is quiet with amp and speakers.

Let us know what your progress is.