I have a Pioneer - GM-Series 2000 W Max Power 5-Ch. Class-D Amplifier.
75 W x 4-Channel
200 W x 2-Channel
350 W x 1-Channel
4 Ohm Bridged / 100 W x 4-Channel
350 W x 1-Channel - 4 Ohm
600 W x 1-Channel - 2 Ohm
As you can see, this amp operates at 4 or 2 ohm loads. I have 2 Punch P2D4-8 but...