Ok...I have a Sherwood SP180 powered sub.
I believe it's an 8 incher and 80 Watts.
It has a fuse(of course), a left and right input via RCA(non-Powered).
It also has inputs via speaker wire(left and right), and an output for left and right satelite speakers.
So what you can do is run the sub off of your Reciever, and use the amp in the Sub to run satelite speakers. Or just run the sub off of its own AMP.
It has a volume knob, and a crossover knob. And a standby mode for the power switch.
Hits nicely, but I have a pair of Cerwin Vega Towers with 15 inch subs in them so it doens't really do much compared to those.
It's in good shape. Perfect if you have a little mini system, or if you are trying to put a home theater together on a budget.
I prefer to sell this to someone local in either San Diego(La Jolla Area) or Los Angeles(San Fernando Valley Area --yes, yes..I know that's where they film porn!!)
Make me an offer.