Now I can't understand why a excellent amplifier builder would make a 6 channel amplifier with all 6 channels having 75 watts, I would have thought the real power would be needed to drive the subs on 5 and 6 channels. Are there way to reconfigure the power suppy on A/D/S amplifiers (A/D/S PH 30.2 PowerPlate Car Audio Amplifier). Here is the book on this For More Information: http://www.directed.com/guides/manuals/og/ads-mobile/ph30_2.pdf#search="A/D/S/ PH 30.2" (Owner's Manual) AL.
Condsider the physics - how much air a large (woofer) driver will move compared to how much the smaller speakers will, how directional higher frequencies are, etc. I'm not sure about the answer, but many subwoofers require their own amp. There are other factors to a good system too, like stereo separation and thd, etc.
