[tonyvdb]

Are you not getting much volume out of the ceiling speakers or the entire system?
How high is the ceiling where the speakers are?

 

[tonyvdb]

ok, the receiver is a 6.1 output. Do you have the speakers connected to the proper speaker terminals on the back of the receiver and do you have the "+" and "-" the right way. You need to use the side surround terminals not the back center channel.

 

[tonyvdb]

What are the specifications of the rear ceiling speakers (size, Ohms and wattage) and what is the brand and model?