I Have a Peavey TVX and a BVX cab both 4 ohms. I was looking for a way to power both cabs with 1 head when I found out about this amazing Hartke. Tube preamp with basically a 2x500 watt power amp. Perfect! Yielding 320 watts to each cab at 4 ohms. Tone stack is perfect for My electric basses. Needed a little more eq for My upright so I am running a White 4650 28 band eq on the effects loop. A bit of overkill on the eq but it works Great. Got Mine from Sam Ash through Ebay. 100 bucks off for open box.