You solved your problem by plugging your sub directly into the wall and bypassing the conditioner. My guess is that your amp(s) is/are plugged into the conditioner as well. Most listeners are against running their amps through the conditioner. I would try plugging the amp into one wall outlet, the sub into another if possible.
Sub making electrical noises when connected to a Power conditioner
Hello,
I connected my sub to a power conditioner ( MPC 1500 by McIntosh ). The sub starts running hot with electrical noises from its amp on the back of it . ( no noise from the cone ). I noticed when there is no sound and literally when sub is powered on.
question: what does the conditioner do to the sub amp? I’m not even using by playing a track or anything - simply when turned on this starts happening . What does a conditioner do to power that causes the amp in sub to over heat even when not in use ?
since then I connected it directly to the wall and no heat or electrical noises .