Need some help with an amp's output...
 

Hey all, I'm working on a sub $500 setup for a friend, and I'm basically looking at basing it around a Fusion 5 channel amp, with new speakers and a 12" sub..

This is the amp...

http://www.fusioncaraudio.com/products.php?region=3&action=view&product_id=266

My problem is this:

80 Watts RMS x 4 + 170 Watts x 1 @ 4 Ohms and 1% THD+N
100 Watts RMS x 4 + 260 Watts x 1 @ 2 Ohms and 1% THD+N
200 Watts RMS x 2 + 170 Watts x 1 @ 4 Ohms and 1% THD+N

I plan to run the sub (dual 4 ohm coils, 250w RMS) at 2 ohms, and obviously each speaker at 4 ohms. My question is, after looking at the ratings, im confused as to whether or not you can run it at different independances, or do I have to run the whole deal at 4 or 2 ohms?

Cheers

You should be able to operate the amp at 4 channels in 4 ohms and the sub channel at 2 ohms.

can only agree with that, amen..

So would I get the 2 ohm sub channel rating and the 4 ohm speaker ratings?

You'd get 80x4 + 260x1 dude... since the speakers are running at 4ohm and the sub is running at 2ohm. Those specs are for comparison purposes only.