we had one in johnstown PA, thing was, it had a rare collection of the 'laser' discs (those 12 inch capacitance behemoths that used needles, not lasers) for rent and the player, so us in college, rented them a lot for dorm gatherings. But they had piles of pyles and other stuff that boasted 200 watts for car and home stereo, but was plastic, had tiny wires and weighed nothing. the owner finally got tired of us cracking wise, but didnt boot us as we provided his only rental income on a 'fad' that never took off. I did put a 50w (claimed) amp and EQ that accepted speaker level inputs to run my 6x9 decks in my cutlass and it didnt suck...with that and the dual glasspacks prolly explains why I got a little hearing loss in my right ear
people crack wise about the shack, in many cases the rep is earned, but in the golden years of the 70's and early 80's the shacks 'good, better, best' lineups were not really that bad, a bit over priced IMO compared to its pioneer, kenwood, technics bretheren but also consider this: in the 70's and 80s electronics OEMS were like distributors for just about any other large scale product - they had minimum purchase requirements and they had aggressive (read: $$) floor plan charges, so unless you could afford to offload a trailer of stuff at once, and do this again AT LEAST quarterly - there was no way the little shops could carry what we consider 'big' names. so if you wanted better than 'eltectrobrand' or 'soundesign', off to the shack you went, who also: financed
that being said, given my travels and restoration history - there are gems just about everywhere. snootiness prevents most of them from living today.
oddly, jcpenny MCS and sears LXI were on par with the shack, and I usually sell every MCS I do, BEFORE I am finished with it. go figger.