The better of these speakers is the one that works best in combination with your gear and your listening space to create the sound that you like best. Both are excellent speakers capable of high performance.I have a choice between dahlquist dq20's vs dcm timewindows 3. I've never heard the dq20's but loved dq10's. Which one is the better speaker? I already have a pair of dcm timeframe 500.
Skipper, the OP is asking about the 'TimeWindows' speakers not the TimeFrame TF500's that he already owns. There is a rather big difference between the TimeWindows speakers and the TimeFrame TF500's which are at the lower end of the line. The TimeWindows speakers are much more than "meh." I was really impressed with the DQ20i's with gobs of clean power applied (175w+) and would have bought the pair that I auditioned were it not for my preference for the beautiful tone obtained from the low watt el84 tube amps I own.It's been years since I heard them, and never side by side but, from what I recall, the DQ20's wowed me while the time frames were, IMNSHO, just meh.
To be honest, I don't remember if they were time frame or time windows. Too much time on the island I guess.Skipper, the OP is asking about the 'TimeWindows' speakers not the TimeFrame TF500's that he already owns. There is a rather big difference between the TimeWindows speakers and the TimeFrame TF500's. The TimeWindows speakers are more than "meh.'
Too much time on the island I guess.

It was the flat panel type. mea culpa. As for the DQ 20, I'm positive about that. I had a friend buy a pair, alog with Adcom electronics.The window and the frame are different. Shouldn't be impossible (under most circumstances) to remember if the speaker was a flat 4-6" deep panel type or a column with two front faces, rounded back if you might have seen that. But I also understand there are many reasons that memory could be ah, missing.
Only experience I have is with the TW (not 3) and DQ-10 so I'll leave now.
IMHO, the DQ20 will just destroy the TimeWindows. Just a lot more coherent and better-imaging, with cleaner bass that goes lower with more power. Also easier to position in a room for good sound.
Pretty much every Dahlquist speaker will outperform pretty much every DCM speaker.
Eric
Sold the DQ-10s, and the TW back then, bought the TW. Absolutely a great choice for so many reasons.
they play louder
they don't need a monster amp
they are so much easier to place
they don't take up as much space when positioned well
they image extremely well, even with one in the middle of the front yard and the other one in the master bath, they image
they are much easier to move, both around the listening space and to the new home
they rock and roll better
they don't collect dust all over the crossover
they don't have to have stands.
All that said, the choice proved itself over the years of having to use these in different living quarters, move them across the country a couple times and play loud rock and roll. The DQ-10 was in the running but I made the right choice in my 20s for a speaker to own at that time. That just for the 10 vs. the first TW. I believe today I might go for the DQ-10s, but still have the TW and 2 pair of DQ-10s, so who knows. Don't worry sunbeam, the DQ has a list of winning features, too.
I would really want to hear both the 3 and the 20s to make the choice but without that I might be a 20 buyer. Price might have some influence.
Have you ever heard a pair of TimeFrame TF 2000's being fed a healthy 175 watts of clean power? I have and I fed a pair of DQ-20i's the same 175 watts (different and bigger room) I liked them a whole lot too. I wanted to buy the DQ's but I was smack in the middle of a purging mode and just getting in to low watt tube amps and high efficiency speakers so I didn't get them. Later on down the road I lucked into the TF2000's for stupid-low money so I bought 'em. Mostly though I listen to my vintage tube gear and modified Klipsch Forte speakers.Cerwin Vegas play louder too.
I've had two kinds of TWs and TF-500s and 1000 and their soundstage is diffuse but huge. Bass is incoherent and muddy. I've had six different models of Dahlquists and while the DQ-10 is quite good the DQ-20s and 30s are in an intirely different league. Head and shoulders above the 10 and, in my estemation, that much and more above the Time Window.
I really believe it's up to the listener to decide their own preference And they are certainly entitled to enjoy what they find sounds best to them. My money is on the DQ-20s.
Enjoy.
Eric

Late to the party, but I have both the DQ20i and the DCM Timewindow 3 and think the Dahlquists sound much better although they require a lot more power.