Thanks. I'll finish putting it together, and see if it works. I just didn't know if it was hooked up wrong if it would be a bad thing.
The "new" part isn't really new, just to me. The one in the amp I'm trying to replicate was a RC4558P(hope that's right), and the new one JRC4558dx out of an old JVC stereo. I think the new one isn't going to be perfect, but I think it will work. But what do I know, this is the first time I've done a full project, not just replacing parts.