So I've had this NuTone system for quite a few years, I was able to buy it through my work at cost plu 10. Granted I know I'm not getting the highest quality product in the market, but it does what I need it to do.
Out of the box it worked fine for a few years, bought as a home theater speaker package for 5.1 setup. About 4 years ago It stopped providing as much output, power indicator light showed on and I would get crackling/static without the receiver being on. However when providing input it's output is low to minimum at best. I've changed cables and changed receivers, I have also tested the sub using my iphone with RCA connectors and it seemed to work better.
Right now I'm using a Sony STR-DH520 with a Y-adapter and have the SW level cranked up to max.