Hey guys, I am just wondering what if I use 400W 8Ohm cab to TB500 in 4Ohm position? It gives me about 300-350W? I think so, like the other amps do. But I am not sure about it. 4Ohm position 4 Ohm cab= 500W, 8 Ohm position 8 Ohm cab= 500W..What if the third way? Thanks for advice.