Here's what I bought at Best Buy: Pioneer*Dolby Digital/DTS Home Theater Receiver-and-Speaker Package*—*HTP-210 Includes 500-watt receiver, five 2-way satellites and 100-watt sub; Dolby Digital/DTS decoders; 5.1-channel inputs; 6-mode DSP; 2 digital inputs When I set up my system I noticed a distortion in the subwoofer on playback. With my ear pressed against the unit I could hear a scratchy rumbling. When I turned off what had been playing, I could detect a constant low-level rumbling. I've tried removing wires, swapping it around to other outlets in other houses and still the strange rumbling. So. Today I was able to swap out the subwoofer at Best Buy. Taking this new subwoofer around again I can hear another sort of cycling rumble. What's more, it's WORSE - a nasty pop n' hum - percolating. Is this a flaw in this particular Pioneer system? I tried plugging my subwoofer into the EXACT same outlet as my friend's Sony SA-W305 subwoofer (which does NOT have any audio problems) and still, the same popcorn-like crackling with a persistant hum underneath. Has anyone out there come across a problem like mine? AND can you suggest solutions ... or alternate products that come in for $500? MANY thanks for all your patience and help!! Happy Holidays!