that it only has two amplifier channels. It is possible to use that as two channels of extra power to add to another power source, but I wouldn't try to bother.
You need to start working on a new system. You can start off minimal & add on later like more speakers as budget allows.
Basically you need to past back with your realistic budget & spell out what you want to accomplish.
Hi I have a carver 6250 a/v receiver is their A way to convert it to sorround sound or should I just get a whole new system.