powering two pairs of Dahlquist DQ10s

Timlub or anyone remember who suggested the stacked DQ10s?? Someone marketed the metal brackets you are talking about and the reviews were very favorable. I can't find it on the internet. I remember when Mark Levinson sold his stacked DQ10s on ebay, that is when I researched it and pondered the idea. Hifigeek, how did your customer modify his DQ10s? I have added 12 inch Infinity polypropylene "car" woofer :)..fits perfectly in hole...little close in depth.... and Heil midrange driver and infinity tweeter to replace piezo.... love them. My friends think I am crazy...but $500 total in speakers and I am having fun. FYI, I compared Double Dyna to D76A on these speakers and it was amazing how similar the midrange was on two completely different designes....Just like Harry Pearson said. Also, I just read a Jim Bongiorno interview where he stated he "HATED" tubes...love it. I had to turn the bias up (Enid Lumley told me what blue pot) ;) on the Dynaco to make it sound more like the 76A....The Dynaco ran HOT!! Well, back to trying to bias the ARC Classic 60...having fun again.
Oh, DQ10s on the wall... I have several comments, but I shouldn't.....but thanks to the post anyway.

I had a nice pair of DQ-10s in the early-to-late 1980s and really liked them. About 1983, I installed the Randall Research modified crossover and drivers with nice results. With today's crossover components, wire and drivers, I would imagine that you could assemble a really nice pair.

Properly powering all four speakers with a single amp would be a tall order, to be sure. Get them away from all walls! not behind or on sides. Properly set up, they will image like crazy, with light, airy highs. I can only imagine how nice four would sound.....

Apfdirtdoctor...He disconnected the Motorola Piezo Tweeters and put all new film caps in the crossovers. I think he rewired them as well and replaced the woofers. OMG Enid Lumley. There's a name I haven't heard in decades.

Sorry Apfdirtdoctor, I didn't know of any articles. My old friend might have indeed read it. This was around 1980 to 1981.

I thought Mark Levinson stacked Quads, not Dahlquists.

As in HQD for Hartley, Quad and Decca.