Matching Rotel RMB-1095 to a pre-amp


I own a Rotel RMB-1095 five chanel power amp. 200w/8 oms.-
330w/4 oms per channel and need to purchase associate piece.
I have set up my whole home theater system with RBH Signature Series speakers.
Also what is the difference between a pre-amp,surround sound processor & reciever?
Thanks,
Dave
spear11
Typically a preamp is two channel only & will not process surround sound.
Processor is 5 to 7 channels. Processes surround sound.
Receiver can be 2 to 7 channels with preamp and amp combined into one box. 2 channel version will not process surround sound.