Hey all, i have a newbie question, i have 2 cabs, a peavey 15inch (i think) and an ashdown 2x10. both at 8 ohms can i run an amp such as the yamaha BBT 500H amplifier which outputs 2 and 4ohms? and if so what wattage? also does anyone own the yamaha BBT 500H? and is it any good?