The analogue signal from the satellite receiver will be significantly lower than the digital output signal. You should try using the satellite receiver’s optical output to your AVR. I noticed I huge difference in overall SQ with mine.

Regardless of that, you have something set wrong. You should be able to get 90 DB's or so out of that Pioneer. It may not sound all that terrific, but it'll be loud as hell.

It’s not the speakers, it’s something else. Definitely not the speakers though. Unless you removed the binding post bridge…..possibly?