Time coherence - how important and what speakers?

Greenmountainaudio.com is almost done.

We leave to display our speakers at the T.H.E. Show in a couple of days. Don't know if we'll get the site up before I leave, or while I'm gone, but soon...
Best,
Roy

I tend to like Brit monitors...such as Spendors,Proacs, and my Quad 12Ls...and all of these companies are rather "secretive" on disclosing exact crossover componets,design schematics,etc...in short...they dont overly advertise being time/phase correct...but Im sure they incorporate some of these traits....in short...I feel "phase coherent" has become a marketing slogan...and really detracts from the few companies who are actively applying this viewpoint...and even after listening to Vandersteen, Meadowlark,etc...I still opted for the imaging precision,transparency,soundstaging,and larger sweet spot of a full range monitor...the "lobing" effect of 1st order designs...in my humble opinion...far outweighs the benefits...

I have owned a couple pairs of Vandersteens in the past and I thought they were great but now own a pair of Tyler Acoustics Lynbrook monitors and they are the best speaker I have ever heard under $10,000 and I have listened to most big name models. Designs are more marketing ploys to get you believe their design is the best. There are many great speakers out there and it is the execution of the speaker builder with all the parts, cabnets ect., that make them either great or mediocre IMHO.

This might help: a link to my postings on "The Vinyl Engine".

http://www.nakedresource.com//yabb/cgi-bin/yabb/YaBB.pl?board=general;action=display;num=1038342561

Best,
Roy

Phase Coherent Base:

Thiel claims phase coherence of +/- 10 degrees. However, a review (Soundstagemagazine.com/measurements/thiel_cs16/, July 2002) of the Thiel CS1.6, shows that the phase angle varies +/- 45 degrees between 50 and 500 Hz. As I understand it, the compression in the box and the inertia of the woofer causes the phase shift.

OK! No box. An article on the Magneplanar MG 1.6/QR shows a +/- 40 degree phase shift centered at the crossover frequency of 600 Hz.

The phase shift includes serious changes to the 1st, 2nd ,and up, harmonics. The harmonics give the richness to the instruments. Drums may lose their impact, except in the fundamental.

My observation is that I have never heard a speaker match the live performance of an acoustic solo Trombone or kettle drum.

Question: What effect does this phase shift have on base definition? Is there a manufacture that has a speaker that is phase coherent in the base? Has anyone heard phase coherent base? If there is a phase shift and you can not go back in time, is it possible to phase shift the good guys to equal the sluggards?