I don't have the history on the Koss speakers but they are older, late 70s? What made you choose them, had younpwned those for years , etc. Thanks
I'm doing a lot less younpwneding nowadays than I used to.
I traded a pair of Bose 501s straight up for my first pair of Koss CM/1030s in the Fall of '78. That was the start of a beautiful relationship.
The series was made from 1977 to 1984-ish. There were ~700 pairs made of each of the CM/1030 and CM/1020, and likely half that number of CM/1010.
I consider them to be one of the finest American-made speaker series ever: a beautiful combination of design, style, materials/finish and performance.
I'm not exactly sure when the idea to "stack" them tweeter-to-tweeter came to me, but I know that I was likely inspired by looking at some D'Appolito speaker design and thinking it might work - and it does! (Especially in my main HT where, if I take the base plinth off the top pair, the stack quite literally goes from floor to ceiling, with maybe a few sheets of paper to spare.) I've never seen pics of anyone else doing it with these speakers so either I'm a groundbreaker, or crazy. You be the judge!
While I've never owned two pairs of CM/1020, and have thus never "stacked" them, I'd like to try some day. I suspect that it might even sound better than the CM/1030s - at least in terms of coming closest to a true D'Appolito layout. (The CM/1030 sports vertically-aligned tweeter and treble tweeters, along with dual horizontally-aligned mids and a single woofer, whereas the CM/1020 has a single tweeter, mid, and woofer - all vertically-aligned. When I set up all three speaker pairs in my living room for my GTG a few years back, folks preferred the imaging / soundstage of the CM/1020 over the CM/1030. I think that would continue / improve when stacked.)
Jeff