He's right Korvettes had the XAM brand, I had a few of the $69. B&W sets with tubes 12"ers and they looked a lot like the GE's of the same size. 12" B&W with all the knobs on the bottom. They were store specials.
http://en.wikipedia.org/wiki/E._J._Korvette (some electronics manufactured by Roland Electronics of Japan)
Great store I use to get all my records there as a kid, and they had a very well stocked photographic department complete with chemicals, enlargers, paper, film, kid memory moment..................................