I need some help in calculating my gains, where my amp will be positioned its not going to be easy to adjust them, so I want to get them right first time.

I have a 4 channel amp that puts out 50RMS @ 4 ohms / 4 x 75 @ 2 ohms / 2 x 150 Bridged at 4 ohms, I calculated the following:

Front 2 channels will be hooked up at 2 ohms so sqrt (75 *2) = 12.25 volts
Rear 2 channels will be bridged at 4 ohms so sqrt (150 * 4) = 24.49 volts

Can someone confirm that these are correct? also what would be an good test tone to play for the front speakers and for the sub?

Thanks.

 

Good calculator here:

http://www.subwoofertools.com/forum/setgain.asp


Maybe 1,000hz for the fronts and 50-60 for the sub.

 

Yes, your calculations are correct.

Like D said, use a 1k Hz tone for the front, and something like a 50 Hz for the sub...