Phase Coherence or Time Alignment: Which More Imp?


This thread is really a follow on from a prior one that I let lapse. Thanks to everyone who contributed and helped me to better understand the importance of crossover design in building a loudspeaker. What I gathered from the last thread that there are opposing camps with different philosophies in crossover design. Leaving aside for a moment those that champion steep slope designs, my question is for those who have experience with speakers that are time aligned and/or phase coherent (using 1st order 6db per octave crossovers). Which is more important, phase coherence or time alignment? In other words, which more strongly influences the sound and performance of a loudspeaker? The reason I ask is because of the four speaker lines currently on my shortlist of floorstanders, three are either phase coherent or time aligned or both. The Wilson Benesch Curve's/ACT's and the Fried Studio 7 use 1st order crossovers but do not time align the drivers through the use of a slanted baffle. The Vandersteen 5's and the Quatro's both time align the drivers and use 1st order crossovers. I guess what I am asking is do you need to do both or is the real benefit in the crossover design? I'd appreciate your views.
BTW the other speaker is the Proac D25 and D38
128x128dodgealum
I'm unsure if we have trolls in this thread. Lrsky used to work for Thiel, goes through an attack on first order crossovers, then says he likes Fried speakers, which are first order. It doesn't make a whole lot of sense, along with his rank ignorance on the patent issues. Josephaud then offers highly damning praise to Thiel speakers, thus offending them and Roy Johnson (decidedly not "the only manufacturer who really implements low order crossovers properly",) whose participation here is far beyond that of others in terms of technical information.
>I said there are no patent holders on First Order Crossovers

This is not what you said. What you said is right in the thread, and I quoted it. Go read it again. At any rate, your incorrect claim doesn't apply anyway, since the Kaminsky crossover I referenced is not first order. So sorry for your multiple confusions.

I didn't read the rest of your post.
Two things really, Suits me. Fried yelled at me constantly about THIEL speakers and their damnable first order crossovers. He did not use a straight 6db per octave crossover as proven on his archived information which I would be glad to send to you.
Second, I am sure, and I apologize that I misspoke about the Patent--what I should have said is, if there are any active patents on first orders, (the subject here) they are not being inforced, due to the issues you chose not to read.
Let's be friends, in the spirit of Bud, one of the industry giants. His spirit is alive in all of his products, that's for sure. And boy did he hate a true first order. My wife would laugh at me, as I would hold the phone away from my ear, as he would yell about the 'evil' of that kind of crossover. "They don't work, Goddamnit", as I recall. He was a hoot, who I will surely miss.
Friends, I hope...
BTW he used a first order on the bass, and a third on the mid treble, as I recall.
In response to the above, in Richard Hardesty's "Audio Perfectionist Journal Watchdog list," a letter was posted by Bud Fried that was aimed at JA in Stereophile for stating that time and phase were unimportant. He went own with an explanation and then concluded by saying "I think someday ALL speakers will be time and phase coherent." I don't remember wether it was actually published or not but it does seem to be in direct contrast to the statemnt(s) made above. Now, did he have a change of heart in his old age, was he BS'ing JA or what's the deal here?
At any rate, it's nice to know that Richard Vandersteen is a second rate designer of time and phase coherent speakers. I feel somewhat disappointed that I and hundreds of thousands of others have put up with a rolled off speaker lacking in resolution and of questionable design. I guess I could call him tomorrow and ask for my money back. Of course he then would ask why and I would have to tell him that based on Jeff Joseph and some other fellow who has speakers coming out are the only ones who know how to make a speaker correctly. He would then ask where I saw this and I would say on 'Audiogon." When he got through laughing, he would probably tell me to kiss his ass!
My exact comments regarding my opinion of Vandersteen was, that, " I say they sound rather neutral and pleasant."
As far as coherence, the initial thought of the discussion, has been lost. It had to do with Suits Me stating that "then says he likes Fried speakers, which are first order."
If one goes to Frieds stated work and crossovers on certain products, which I just referenced tonight, he used 3 db per octave slopes on the woofer, then 18 db per octave, which is third order cross over on mids and tweets.
This has turned into a hornets nest of confusion, for which I can take some credit probably. But Fried, most definitely was NOT a proponent of true first order networks as described as 6 db per octave, the proof of which is listed with his archival work, and my personal conversations with him, in which he found that to be unacceptable, in the design of loudspeakers.
I have nothing but profound respect for Rich Vandersteen, and what was said in my quote was by someone I was with. Truthfully I probably shouldn't have repeated it, other than to point out that his speakers are NOT forward sounding as are the THIEL's.
The 'some guy' who has speakers coming to market is me, Larry Staples, who studied under Jim Thiel, and Albert Von Schweikert, and has 25 years invested in the industry.
It takes thick skin to take a stand on these, supposedly hobbiest friendly sites. If I offend anyone by recanting past experiences I am profoundly apologetic. I found Bud Fried to be passionate, and brilliant. He was a grad of Princeton as I recall, and a fantastic representative of the field of audio, as is Mr. Vandersteen.
We all have disperate ideas on what works in design. Nobody has all the answers. I am struggling to make my product come to market and only hope to have a fraction of the success that Bud and Rich Vandersteen, and Jim Thiel, as well as the others who have contributed so much.
My speakers are a tribute to design by listening, not intellectualizing what 'should work'. I voiced my product, making it sound as I personally think real music sounds like. Some will like it others won't. Be aware that I am only ATTEMPTING to add to the science and art of building speakers.
Please, no one, take offense at any misspoken words.

Best,
Larry R. Staples
LSA Group
President