In article , jts
wrote:

I have a subwoofer that hums when it is connected to my A/V amplifier.
Both unitw were repaired recently, yet the problem persists. I am at
a loss. The solid state amplifiers were replaced in the Pioneer
SA-HE200 amplifier. Only the powered subwoofer is effected; the other
speakers (front, satellite, center) function well. The amplifier in
the powered subwoofer was just replaced as well. I installed the unit
myself and hooked it up as KLH instructed. The subwoofer is an E-10D,
part of the plat-6 system. The interconnect cable is shielded and
uses gold plated RCA connectors. The problem is the same with the
unshielded cable delivered with the speakers. What do I try next?
BTW, music does play through the subwoofer, but the hum is louder. I
can also change the hum volume by playing with the subwoofer gain.

1. Does the subwoofer hum when there is no cable attached to it?
This will help localize if the problem is in the subwoofer itself,
or if it is picking up the noise from the receiver.

2. Try playing with the power cord. Flip the plug 180 degrees if
it will allow. Also, try plugging the subwoofer and receiver into
the same outlet (or same power strip). Try a different outlet,
different circuit, and try flipping the plug on the receiver. You
might have a noisey circuit, bad ground, mis-wired outlet, or a
ground loop.

-john-

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John A. Weeks III 952-432-2708
Newave Communications http://www.johnweeks.com
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