Receiver?

Right now i have a 250W surround sound stereo system w/DVD player by RCA and I'm looking to boost my decibel level. I have 2 (two) Pioneer CS-911A's along with another 100W surround sound system. I was curious what kind of receiver, if any, I could use to connect all 3 systems, how much it would cost, and where i could get it. Also, i was wondering that, if there isn't a receiver that I could use, if there was a way to wire 2 (two) or more separate receivers to get the desired result.

Yeah, they're all in the same room. And i just want them wired together for maximum sound, the RCA speakers are decent, along with the CS-911A's which are 30+ years old, so sound quality isn't one of my concerns, the only thing that worries me about it is that the RCA receiver can't handle the wattages. If I can't get the original plan to work out, what would you recommend i do? I've had the two systems hooked up in separate rooms on different receivers (the CS-911A's are hooked up to a Panasonic SA-H30 so they're not that impressive right now) and the RCA system is, basically, crap, since it turns off if i turn the volume up too much. Any suggestions?

Like i said though, I'm not looking for quality I'm looking for loudness...but i do appreciate the reply, if all else fails I'll sell it all and try to buy some good speaker's