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
If you read my posts above, I tried to express the theme that it is probably wise for the general "Audiophile" to not get so immersed in crossover engineering and go out and listen for themselves to the various designs. I also stated that it was THEIR money and satisfaction that was at stake.
I believe that a person's idea of "Good" sound is so highly variable that any and all designs can be considered.
I just happen to be in the first order camp and have been there for a long time. I have based my opinions on 40 years of experience of listening to various designed speakers in my own room side by side. I personally feel this is the only way to judge a speaker and unfortunately, many do not have this opportunity. I just don't think that dealers stores and shows are the place to make a decision (or honestly formulate an opinion) but that's the way it is.
As I have stated so many times, I feel that preserving the waveform is of great importance. I always step back from time to time and listen to other designs to maintain a perspective and to me personally, the compromise in higher slope speaker designs is just too great for crirical listening, even though, I will admit, some sound very good. Hell, I use steeper slope speakers in my home theater because I have never felt it was THAT important used in this context (with the exception that I do believe the drivers need to be matched.)
We will just have to agree to disagree on the ultimate merits of each design and I'm sure this debate will go on and on. It's always interesting though.
Nice post, Larry!

Only one thing, I'm sure that Bud is turning over in his grave right now regarding your feeling that he went to Princeton. As you will well remember via this prodding, it was "Fair Haaaaaaaaavud".

All I will add is that he was truly a member of The Greatest Generation. During his time there, he received every degree they offered, medicine and dentistry excepted. Though he was frail later in life, his energy, enthusiasm, and confidence, and wit would put any 23 year old to shame.

I am a better person because he befriended me. He and football great Johnny Sample have both made indelible marks on my life.
Sorry Bud, what a disgrace to accuse him of graduating from Princeton. LOL! Actually, it was so long ago, I figured I had a fifty fifty shot.
Again, what a mind, what a guy. Legends like him will last forever.
Years after I opened my store, a guy I had been trying to THIEL-ize, came in, and had found either the TL 50's or the Studio Monitors. They were magnificent. Music rolled out in the bottom like almost no other. Wow.
Transmission lines don't work according to some, who say the laws of physics, and length of the bass wave preclude it- I say, TELL THAT TO THE WONDERFUL BASS ROLLING OUT OF THEM !
Trelja am I correct in saying that a true series crossover has to to pass all the information sent to it by the amplifier, unlike most every other crossover design? Tom
>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.

You're still confused. First, I was never talking about patents on first order crossovers. I asked the expert, Roy Johnson - not you - what he thought of the patented Kaminsky _higher order_ series crossover which claims to be phase coherent. This crossover is relevant to this thread; and the thread itself is a perfectly legitimate topic for discussion: Phase coherence and/or time alignment. The thread is not titled "first order crossovers" as you seem to think. This is why I wanted an expert's opinion on the Kaminsky, which makes radical claims.

You then made everything confounding not only by mis-speaking, but by denying what you posted on this point specifically. Your other posts have a high degree of error and even internal contradiction, imo, but rather than go through it again I'll just keep it in mind for my future reference when I check your posts and your products.

OTOH, I may have gotten some of my information on some Fried crossovers wrong. I always appreciate corrections regarding my own misconceptions or lack of specificity. It seems some of Bud Fried's crossovers were asymmetric...but I don't know model by model.