im in need of a head. I have a very old peavey 400 its ok but its old some of the pots do nothing to change my tone. It seems it could be messed up. Although,it does sound good when i tweek it.. anyway im thinking i need new. My options at least what it im thinking of getting is either a hartke 5000 or a peavey firehosreII(i think thats it). There both around same price. I just remembered i have a 1972 .http://www.sunnamplifiers.com/mis/concslave.jpg question is, should i go with one of the above heads or get a SWEET pre amp and use this power amp with it? 2. is this sunn bridgable? thanks a lot guys!