the other nice thing about this amp is its 17" wide while all the other Sunfire's are 19" wide
i have this same amp ( 19" ) and the theater Grand or i would own this
one speaker or a pair
i have a single A-55G ( cost $175 new ) sitting here that i was using in my center channel if your looking for 1
save you some money
the first set is most likely from 1960 - 61 with vertical horns and the slot in the back. could have a 12" woofer in them also.
the bottom set is from 76-77 or 78 with the letters P - R or S stamped into the wood on the back top edge