Any still using the Dahlquist DQ-10 speakers?

Yes and no.   I still own a pair of DQ-10 speakers. Five years ago I poured a small fortune in to them with all the updates and upgrades. I even went to a custom furniture maker and had him make a very nice set of custom speaker stands. I may have spent $2,000 rebuilding on the DQ-10s that cost me $1,200 40 years ago.

 Three years ago I purchased a pair of Magnepan 3.7i speakers to replace them after listening to the maggies driven by some Classe’ amps. I am disappointed in my current home setup and I blame my 40 year old power amp. Both the DQ-10 speakers or the Magnepan 3.7i sound OK but both are hindered by my old power amp. I remember listening to the 3.7i for the first time at home thinking that is not much better or different than my rebuilt DQ-10s. Each will need a first class modern preamp and power amps for best performance and a fair comparison. And that is next plan.

Not anymore but sure miss them. Played them with bridged Dynaco ST 70s. Sold them and the guy who bought them picked up another pair and wants to stack them. Really want to hear that!

Running stacked DQ-10s through a McIntosh C20, 2 MC2205s power them. I am in the process of having my power amps restored by Audio Classics. Looking forward to hearing the “new” amps. They were great before. Only decided to do the amps after I heard the C-20 when it came back from it’s restoration. I love the sound stage and pure sound I get with my system. Hope this helps.

Of course they sound great, minimum baffle, attempt at time alignment, designer who selected a quality doped midrange ( Infinity used the same doped Phillips mid )...

fun

Oh, he** yes!

I fondly recalled being stunned by a set decades ago, wondering if my memory was accurate; fondness deserved, so I bought a local pair. They needed zero driver/cone/surround repair.

Temporarily replacing  my active-sub-supplemented MG-IIIa pair, loved for ages, after a cosmetic refresh of side walnut panels and new black 'socks', I feed them from a cello palette pre via balanced cello strings and Levinson 23.5.  The DQ's don't image as precisely as the Maggie's, but WOW--- they love to sing.  I prefer them at or above realistic decibel levels. :-)  and well above what the Mags will deliver.  Rock, ROCKS these old ears! Other genres are superb, too, unless you're trying to discern the color of the flute player's top.  I used to, but now just savor the music, which IS the point.  I understand there's a variety of preferences in audio, but precise detail and analysis of fidelity isn't all.  I sing, chair dance and stay up too late enjoying the DQ-10s.

I mirrored them and did a capacitor upgrade (age concerns); neither sonically worth the cost of high quality parts nor my time.

The Levinson delivers Class A  rated at 200W/ch. so I keep spare tweeter fuses handy.  They love and deliver on clean power and plenty of it.

Positioning them was far easier than the planar Maggies, which are lovely and very accurate, brutal to lousy inputs, but physically incapable of the ROCK moments, hence  I listened to them at lower dbs, and was very satisfied  (see decades, above).

'Temporary' continues, to my great pleasure.