Re: How many own (AR) Acoustic Research speakers?!!
You can get a reproduction of the original product guide for $1 from here:
Acoustic Research AR Manuals Service User Owner Instruction Schematics Manuals PDF, Brochures and other Literature For Sale
Or the some specs here:
Acoustic Research AR7
Or replacement speakers from the original manufacturer here:
Acoustic Research Parts From the same Manufacturer AR has been using since 1983!
Hope this information helps.. It appears that the AR7 Hi-Res was discontinued long before the downfall of AR, since the Wayback Timemachine only has the AR7 Hi-Res listed on some of their oldest archived pages, but not in the latter years (when the page was black).
I own a set of AR1, 2 sets of AR15, 2 sets of AR17, an AR2c, an AR4c, and an ARS300. I love all of them dearly.