I just got this vintage made in USA acoustic 370 bass head pretty much free in a pawn shop along with a boogie gui**** amp. Anyways I need info regarding this amp... the two speaker outputs on the back... impedance... info regarding how to use the two monitor jacks on the back... maybe someone here has a manual, schematics? What are the boost switches on the front for...? They seem like really weird effect s but I couldnt use them... Anyways I plugged the acoustic into my Powerhouse 1000 and was blown away by the power. Better sounding than an 800rb and simpler.... and a hell of a lot more power. I'll post pics later, but its in pretty neat condition... some non original knobs tho.