280 watt on 1 ohm audiobahn amplifier
 

It is still pretty much new used only a couple of times. I paid somewhere around $450 for it. Made to power multiple speakers on 1 ohm stable. It is an award winning amplifier as well.

Audiobahn a235hct

4 ohms = 70 watts X 1
2 ohms = 140 watts X 1
1 ohm = 280 watts X 1

I am looking for 300 obo!!!