Hi,
Maybe you guys can help me or point me in some direction.
My apartment seems to be the King of Hum.
About a year-and-a-half ago, I "upgraded" from a CJ amp to Art Audio monoblocs. To my dismay, they hum like a bumble bee. I've tried an Exact Power unit, a BP 3.5 and a humbuster. Not only did they not work, but each transformer within these devices hummed. About six months ago, I bought a turntable - and the speed controller hums. The vendor says he has hever heard of one of his speed controllers humming and suggested I have my wall socket tested. More on that in a moment.
The only device I found that kills 90% of the hum at the monoblocs is a PS Audio 1000; which I just sent to PS Audio because it is blowing my equipment fuses. (I should know shortly whether there is a defect with the PS Audio unit - and to PS Audio's credit they are examining it at no charge even though I bought it here on Agon). The PS Audio only kills the hum when I set it to mode #3, which according to PS Audio, "adds a little 3rd order harmonic distortion, which makes the transformers operate a little more efficiently". The PS Audio hums, but it is much quieter than the monoblocs. The PS Audio has no affect on the speed controller hum.
I have tried all sorts of versions of lifting the grounds. I have tested the grounds at the so wall socket, which are ok. I have unplugged what devices I can from my apartment one by one.
Any suggestions? If I hire an electrician to test the wall sockets, can anybody tell me exactly what I should ask him or her to test for? What do I do with the results once I know? I am adrift in hummmmmmmmmmmmmmmmmmmmmmm.
BTW, kudos to Conrad-Johnson for manufacturing the only amp that does not hum at Jeff's pad.
Jeff
Maybe you guys can help me or point me in some direction.
My apartment seems to be the King of Hum.
About a year-and-a-half ago, I "upgraded" from a CJ amp to Art Audio monoblocs. To my dismay, they hum like a bumble bee. I've tried an Exact Power unit, a BP 3.5 and a humbuster. Not only did they not work, but each transformer within these devices hummed. About six months ago, I bought a turntable - and the speed controller hums. The vendor says he has hever heard of one of his speed controllers humming and suggested I have my wall socket tested. More on that in a moment.
The only device I found that kills 90% of the hum at the monoblocs is a PS Audio 1000; which I just sent to PS Audio because it is blowing my equipment fuses. (I should know shortly whether there is a defect with the PS Audio unit - and to PS Audio's credit they are examining it at no charge even though I bought it here on Agon). The PS Audio only kills the hum when I set it to mode #3, which according to PS Audio, "adds a little 3rd order harmonic distortion, which makes the transformers operate a little more efficiently". The PS Audio hums, but it is much quieter than the monoblocs. The PS Audio has no affect on the speed controller hum.
I have tried all sorts of versions of lifting the grounds. I have tested the grounds at the so wall socket, which are ok. I have unplugged what devices I can from my apartment one by one.
Any suggestions? If I hire an electrician to test the wall sockets, can anybody tell me exactly what I should ask him or her to test for? What do I do with the results once I know? I am adrift in hummmmmmmmmmmmmmmmmmmmmmm.
BTW, kudos to Conrad-Johnson for manufacturing the only amp that does not hum at Jeff's pad.
Jeff