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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
kalali's avatar
kalali
1,977 posts
 

Thank you guys. I see he has a few DI pairs listed under the "Specials", most with upgrades. I'm still baffled with how efficient these gentle giants are...

Kenny - They must sound incredible paired with your LTA gear.

kdude66
1,200 posts
 
kalali,

The efficiency comes from the combination of,
Drivers used
crossover design
cabinet internal volume
4 ohm impedance 

And a touch of designer brilliance IMO.

They do sound simply wonderful in my system,the best sound I've ever owned and rivals many super high end systems that I've heard.
I guess that is why you can see I'm so passionate about them.

I sent you a pm a few days ago,I don't know if you got it.


Kenny.

onhwy61's avatar
onhwy61
5,212 posts
 
Thanks for the info.

I imagine nearly everyone orders the DIs with the upgraded wiring, terminals and crossover components.
missioncoonery
1,215 posts
 

I know the DI speaker quite well,
I have upgraded every part in the crossovers except the coil on the woofers.

I know every crossover point from testing and confirming the points with the crossover design.

I have upgraded all 4 10 inch woofers to a better match for me.Enter your text ...


 Just curious, if the DI sound so great why all the changes..changing out all the woofers and upgrading completely the crossovers.What didn't you like,missing or want to hear ,and what drivers did you go with

kdude66
1,200 posts
 
They did sound great right out of the shipping boxes,but I haven't owned a speaker yet that I did'nt mod and get better sound.


Even though I did buy a upgraded pair of Di's from Eric,I have upgraded farther with even better caps,inductors and resistors and some wiring.

I started with the crossover on the woofers,
The heavy duty Jantzen coil is fine I didn't change it but I did change the single cap and got rid off the sand cast resistor,I don't like that type,I think they can be noisy.From day one when I got the speakers I didn't like cosmetically the blue colored woofers with my black metallic paint so I changed to the Eminence beta which gave me black cones the stock ones are the alpha's with blue cones.The physical size including depth are the same but the specs are slightly different.The beta's are 2 to 3 db more efficient in their specs of the driver in free air and they give me better bass and dynamics at very low volume levels and they equal or are slightly better defined bass at higher volumes.I also biwire mine with a single run of western electric 10ga wire that solders directly in the crossover,and I use the same wire to the woofers.The beta woofers cost 60.00 a piece from us speaker.I hear just better defined bass maybe tighter and does measure 2 to 3 db down at 20hz in room.

Now that's the easy stuff,I took a look at the crossover for the tweeters and mids and decided to change all caps,resistors,and coils to better parts IMO but I did'nt change any wiring,It's ok and would be a lot of work.

Even though my speakers sounded very good once broken in I couldn't leave them alone because I knew I could make them sound better,I basically gained overall smoothness and a tiny bit of clarity without hurting the magical midrange that these speakers have by design.

I wouldn't honestly recommend that everybody that owns a upgraded pair of Di's would want to incur the expense and time involved for the noticeable but modest gains in sound.
Basically what I'm saying It's a lot of work and it took me 2 whole days to do mine.

Take the time and remove a couple of tweeters and maybe the lwr mid and look at the crossover and you will have to decide if you want to tackle it.
One option might be just to change the little bypass cap on the tweeters input to better quality.


Any more questions,

Kenny.
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