Hmmm. Nobody cares. Fine. Here ya go anyhow.
I put a new power cord on my sub amp last night. El Cheapo 12/3 power cord from Home Depot and a decent plug. It's only a 2 conductor cord, but they didn't have 12/2 power cord. Anything would have to be a huge upgrade from the 18/2 factory cord. I also soldered a connection on the hot side that used to be a crimped blade connector "slip on" and installed a gold plated audiophile grade fuse I had laying around. Total investment $7.50, a grommet, 4" of solder, 3 zip ties + 20 minutes.
Improvement? HUGE, it sounds like an 18" sub now. My entire house shook! The blacks are blacker, the background quieter, the booms boomier and my dishes have never been cleaner!!!
Nawww. Just kidding.
I do think the old cord was "strangling" the amp a bit, however, since the first thing I had to do was go down 2 hash marks on the volume dial on the sub amp. The sound quality is not noticeably different at this time, but it is a sub after all.
Maybe if I cryo the volume knob...