[eugovector]

If you're volume is up in the OS, and you're running the line out to powered AVR, you shouldn't need anything else. What's your setup, AVR, Separates, or Powered speakers?

 

[eugovector]

Yeah, you could check that by inserting a different amp into one pair of speakers and see if your volume increases. Also make sure that your in-ceiling speakers are wired to give you proper impedance.

 

[eugovector]

Parts express has inexpensive distribution amps rated for more power, or you could wire the 4 speakers together in a way that give you 6-8 ohms (google "series parallel speaker wiring impedence), and use a pro-amp like the Behringer A500 for more power than you'd ever need.

 

[eugovector]

Sure thing, let us know what you go with.