I don't think I quite understand... what's a 10W 4ohm dummy load? I got the 10w and the 4ohm part... but how does this fit into the equation?
I think Elkor was trying to help Wade with driving the 2ohm speakers with his amp by loading the amp more appropriately. But since he didnt quote anything in his responce, it was hard to tell and I may be wrong.
As for the whole dual PSU thing, I dont really want to take this into an entire 'theory of powersupply operation' thread.
In every case that I have seen where you need more current, you use a bigger power supply, you do not chain two together.
For Wade, yes, the yellow wire is the +12volts and the red is +5volts.
For Chris and his amplifier that shuts off when sound is applied?
How is it hooked up? The amplifier should have three wires for power, a black (gnd) a red (+12v) and a orange or yellow for 'turn on'
You should have the +12 and 'turn-on' tied together, and hooked to the yellow (+12) from the computer power supply.
Also I would go computer-->double-ganged volume control-->amplifier-->speakers
Using the sub/sat amplifier stage in there wont do any good. I would also look into building a crossover so you can use both the sub and the sat speakers.
For anyone else following this thread, keep in mind that you MUST use a seperate powersupply for this, and NOT draw power from the same power supply that is running your computer.