Brands w/ first order x-over, time & phase aligned

Hi Unsound, the panel speakers I cited above (esp. with model numbers) I actually verified (at that time of posting) were 1st order x-overs. Others I cited more generically since I was not sure &/or could not verify were 1st order x-over. thanks.

Robertsong,
I just re-read your topic heading which says "Brands w/ first order x-over, time & phase aligned".

Your next speaker that you really want should be "TIME-COHERENT". Time-coherency is what it's all about & it is time-coherency that is so very difficult to achieve unless you really know what you/speaker designer are doing.
A speaker that is time-coherent will be time-aligned, phase-coherent (I don't understand what phase aligned means) at its x-over freq & at all other frequencies as well. So, time-coherency is the super-set.
Many speaker are phase-coherent but only at their x-over frequencies. At other frequencies they are anything but phase-coherent.
Many other speakers are time-aligned - this can be achieved by a sloped baffle or inverting the driver line-up on a vertical baffle i.e. woofer top-most & tweeter bottom-most. By being time-aligned a speaker is not necessarily time-coherent. In fact 99% of the speakers in the market are not.

I would highly urge you to read the "sloped baffle" thread. There is plenty of excellent info on time-coherency by various members & in particular by Roy Johnson of Green Mtn Audio. In that thread I gave the link to one of the very best threads of all time on Audiogon that talked about time-coherency in speakers. We discussed this way back in 2002! ;-)
hope this helps.....

Bombaywalla, I was actually referring to the Quads and Sound labs that I mentioned in my last post. Sorry, if I wasn't clearer. :-)

In response to the poster who said thinks the Vandy Treo's and Quads are...they are....I love my Treo's....Vandy's only speaker that isn't is the model 1

In response to the poster who said thinks the Vandy Treo's and Quads are...they are....I love my Treo's....Vandy's only speaker that isn't is the model 1
Ctsooner

Not sure why you say this. From Vandersteen's web site,"The Model 1Ci is a time- and phase-correct speaker constructed in such a way that the alignment and positioning of the drivers allow a point-source wave front and maximize the phase coherence of the loudspeaker at the listening position. Dimensional Purity in a shockingly affordable full-range speaker."