I recently bought a Peavey Firebass 700 and am running it through a Sunn 4X10 cab. I bought the amp because I got a great deal and because of its power. It pushes 275 Watts into my 8 ohm cab, but I would like to run at 4 ohms to pull more power. My question is what kind of cab should I add to get the 4 ohm load? The Sunn is big for a 410, so I hesitate to get a 1X15 or 1X18. What would a 2X10 cab do to my setup? Is there a cheap 2X10 that could get the job done? Would it be better to sell my Sunn cab and go for a 4 ohm 4X10 (ampeg or peavey)?