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Tekton Double Impact & Comb Filtering

Like many of you, I have been pondering purchasing these speakers but am very curious about the unusual tweeter array. I asked the smartest speaker person that I know (he is a student of Sean Olive) about the design and below is what he had to say.   

"In theory it could work, but the driver spacing means that the crossover point would need to be very low.
He is using the SB acoustics tweeter which is 72mm in diameter, center to center on the outside opposing drivers is around 5.7 inches, which is about 2400Hz. This means that combing would stop between 1/4 to 1/2 of the wavelength (between 1200-600Hz) is where the outside tweeters should start playing nice with each other.
Since he is not using low enough crossover points he has created a comb filtering monster. Now while it's not the great point source that was promised, it's no worse than most line arrays and the combing will average itself out given enough listening distance.

The MTM spacing on the other hand is ridiculous. Hopefully he is cutting the top end off on one of those midrange drivers to avoid combing."

seanheis1
charles1dad's avatar
charles1dad
10,250 posts
 
The statement questioning the the cost difference of internal parts between Devore and the Double Impact hardly seems like an    "attack".  Just a reasonable observation.  I suppose it is a matter of interpretation and level of one's sensitivity. 
Charles 
mikirob
955 posts
 
No. And no. No attack on DeVore or Harbeth. As charles1dad kindly stated it is a reasonable observation of many speakers internally. You might do your own investigation, you might be surprised in what you find out. Best, mikirob 
213runnin
914 posts
 
I see that anyone holding a different point of view is still getting mob attacked on this thread.  Nitewulf, whenever you see this kind of fervor for any particular brand, there is usually no point in trying to have a discussion.
grannyring's avatar
grannyring
6,645 posts
 
Fact is most speakers "internals" cost very, very little that sell for $10,000-$20,000 new.  You won't find copper foil caps and top flight resistors from Path Audio or Duelund.  You will find sand cast resistors, electrolytic caps, less expensive poly caps and on and on.....The DI speakers may use the same cost parts, but they sell for far less.   The design is so good that they also sound great with average parts.  
mikirob
955 posts
 
And p.s., I very much enjoy both speakers. You're just picking a fight, injecting unwarranted out of context meaning as cmsgolf already rightfully pointed out. Again, research is your friend. Best, mikirob
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