|Originally posted by ooheadsoo
rsaavedr, that sounds like a ground loop hum problem. But I bet you already tried that out...So Aperion charges restocking fee? I didn't know that.
Nope, wasn't a ground loop. I exchanged several emails and phones calls with them to rule that out. Even with a 3-to-2 prong adapter (ground defeater), and having the sub disconnected from the receiver (e.g. no inputs), and having the switch of the sub set to off, and the tv cable disconnected, in all possible setups there was a humming from the transformer of that sub, while there wasn't at all from the Paradigm, or anywhere else in my rig for instance.
I also tried connecting the Aperion in several outlets at home, and at my work place, with the adapter and everything, same hum. It seems to be part of the design somehow, that "power" switch doesn't seem to really cut the power to the transformer but further down the circuit. I can't really tell, and they didn't tell me technical details about that, but I can't see any other explanation.
The hum was really minor, but this was the same issue I had with the transport noise of the Azur. I listen to music in very silent conditions, turning the air conditioning and the refrigerator off, actually also the kitchen light which hums very slightly. In those conditions I discovered the sub remained a source of hum, audible at several feet away, and with the switch turned off!
They charged me a restocking fee only because I had used the unit for almost nine months, way past the 30-day return period. The hum started to get more noticeable after about 6-7 months. And the replacement unit had it just the same. They offered the possibility of returning it after that long time with the 10% restocking fee if I wasn't happy with it. I wasn't planning to return it basically because I didn't think it was possible, but I wasn't happy with that hum, eventually decided to take their offer and returned it.
Sorry for the off-thread deviation, but a free bump, and some more feedback about the interesting things you learn when going the sub route.