Well I recieved my new bass head. A peavey T Max. 500 W at 2 ohms 350 W at 4 ohms 200 W at 8 ohms Im currently running this amp through a 1 x 15 8 ohm speaker that used to be an ashdown combo. I took out the blown amp and solderred up the speaker to a 1/4 inch plug. The amp has 2 1/4 speaker jacks, a main and a parralel extension out. I read running one 4 ohm cab = 4 ohms but two 4 ohm cabs = the amp runs 2 ohm... is that accurate? If i add another 8 ohm cab would i really be at 4 ohms?