I had DQ10's in the seventies, I cannot remember where I bought them or what electronics I drove them with. They were wonderful, and I do remember I had them modified at New York audio labs in Croton. Harvey Rosenberg had a pair set up there with tube electronics, they were sublime! I gave them to my cousin when I bought Acoustat 2+2's. He still has them.
Who remembers the Dahlquist DQ-10's?
My first pair of "high-end" speakers. Power hungry critters but what I would give for an updated pair. I powered these with a Peavey CS-400 and a Maccomack Deluxe Line drive passive preamp!! Those were the days! Young and dumb I suppose?