I have a little amp that I am wiring, it is rated at 150 for one channel and less for two channels, I don't remember, anyway I wired it on one channel, it sounds good, but for the full wattage how do I wire it, pos of one channel and neg of the other? It is an older alpine.

 

If you're talking about bridging it, yes. Just use the far left/right output terminals. One should be positive and the other should be negative.

Also, check the amp to see if it has a stereo/mono switch. Might as well flip it over to mono.