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
Jed, who makes Clearwave speakers (I have the Duet 6 monitors) lists his speaker at 85db. When I asked him if they were too inefficient, he told me that they should play at around 87db in room but he felt that he should simply state the tested figure. He went on to say that lots of speaker designers fudge their specs when it comes to efficiency and to not be too concerned about it. In room response is what you should be concerned with.

All the best,
Nonoise
"Why are the inexperienced so quick to make judgement?"

Because they are Immature and Inexperienced.
Someone that raves about Totem Rainmakers and is poo pooing on a speaker he has never heard before? that is just plain laughable. Why are the inexperienced so quick to make judgement?
Looks like Bose is making a comeback, except these new ones are uuuugly!

On the sensitivity numbers,  Tekton is 6 db off the actual sensitivity., and they should be embarrassed by that.  A noisy square box with low budget drivers, what an awful design that they are charging way too much for.
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Without getting into the original arguments about comb filtering, this measurement of the Enzo XL from Stereophile implies Tekton is not above optimistically rating the sensitivity.

JA measured 90 dB vs. specified 96.

https://www.stereophile.com/content/tekton-design-enzo-xl-loudspeaker-measurements
I agree with the common sense approach of Swampwalker and Sebrof in regard to buyer paying for the return shipping cost of products auditioned in one’s home. I do believe that this would have the benefit of narrowing the field to those seriously considering purchase vs those who just want to hear them with no intention of buying. As was written earlier by bullitt5094 , the buyer should have some "skin in the game".
Charles
I believe that if there is a return situation, Tekton eats the send shipping cost since it was "free."
All the more reason why buyer should pay return shipping costs,  Sheesh; do people want the guy to pay YOU for the privilege of auditioning his speakers???

@seanheis1 you mention the DI’s might not be ideal for midrange junkies and that they are for movies and music with slam.
I suggest that you read again what I said. It was a Harbeth owner who found them too forward for his taste and had a challenge with the center image in his specific room. I hear the same thing a lot with the KEF LS50. Folks loving them at first and then eventually tiring over the forward image. We all have different tastes, rooms, and gear so I expect folks' mileage to vary and I like to hear folk's experiences, good or bad so thanks for sharing yours.    
@seanheis1

I’m in complete agreement on the fact that "no speaker can meet everyone’s tastes." In fact, I’d say that if true, that would be a travesty in my opinion. I am personally happy that there is not one but there are many! If there are those that believe there is One Speaker to Rule Them All....more power to them. I’m cool with that, too. Just don’t lose the ring. :)

What I don’t understand is how you can say " The DI might not be ideal for those midrange junkies that like a laid back sound (harbeth ls3/5a) but might be perfect for home theater and music that has slam."

Have you done extensive listening of the DIs yourself? And by extensive, I mean extensive. This is the very area, among others that the DIs absolutely shine. Your statement is confounding to me, as it probably is to many who own the Double Impacts and have gotten to know them over time.

The DIs are laid back if one is feeding them laid back music. They rock if they are being fed Rock. They dance if being fed EDM. They boogie and bop if being fed Jazz. They ooze soul when playing SOUL. And they get downright blue when belting out the Blues. These are one of the most open to what’s ahead of them speakers I’ve had the pleasure of listening to.

Yesterday morning I was up early (and thankfully before everyone else in the household) so I was able to spend an hour and a half uninterrupted and without any of the excessive ambient noise so prevalent once the troops are on the move. I listened to Steve Coleman’s "Invisible Paths: First Scattering" album. It was his first solo album and is 1 hour and 12 minutes of pure unadulterated solo sax. There isn’t anywhere for a system to hide with such a solo instrument performance. My system, with the DIs at the end of it performed astonishingly and amazingly well.
@seanheis1 you mention the DI’s might not be ideal for midrange junkies and that they are for movies and music with slam.

You feel that way after listening to DI’s? How long did you spend with a pair?

I love the mid range they and they perform beautifully with delicate music. I’d put it right up with the Audio Note AN-E/Lx Hemp I owned previously for mids. Female vocals and classical guitar sound just right. The softer sounding Oscar Peterson recordings are perfect. 

missioncoonery624 posts08-13-2017 8:51pmEric.....If you have few buyers returning speakers then why don't you simply take them back on your dime.If what you say is true seems a no brainer as that's one of your stumbling blocks with me.I would also like to see reputable stereo mags review what you offer.Seems like a positive way to convince those on the fence.
I once bought a pair of empty speaker cabinets locally from a well-know (around here) builder. The price was very low for a pair of well made cabinets, and when I picked them up I told him they were well worth the low price. He said he usually offers his old cabs to fellow Audio Society members for free, but everyone was like "Free!!" and grabbed them but never used them, and they ended up getting thrown away or whatever. 
So he put these for sale, and since I was paying he thought there was a good chance I'd actually use them, which I did.

Similar situation with free shipping both ways. People would order them like crazy, then listen, then return. Oh well, no skin off my back.
Considering the interest the hundreds of posts (thousands by now??) that the Tekton DI thread is generating, I'm sure Eric would be building A LOT of speakers for people with absolutely zero intention to purchase if it was all at no cost to hear them.
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I believe that if there is a return situation, Tekton eats the send shipping cost since it was "free." There is more risk buying internet direct but the reward is if you like the speaker, you can save quite a bit. The guy who started the DI monitor thread originally really liked them, but then returned them due to being too forward for his taste and there being a "hole" in the center image with his specific room setup. I think that the moral of the story is that no speaker can meet everyone's tastes. The DI might not be ideal for those midrange junkies that like a laid back sound (harbeth ls3/5a) but might be perfect for home theater and music that has slam. 
Never heard Tekton speakers.  Given the high cost of shipping these days, and the savings to the consumer associated with direct purchase, I think that the cost of shipping is reasonably put on the buyer.  If you buy something from B&M store of any kind, and you want to return it, you usually have to bring it back to the place you bought it from.  And many (but not all, I'll admit) mail/internet sellers place return shipping cost on buyer.  Those that don't typically have so much purchasing power that they pay far less than a small manufacturer does, so they have little at risk.  As far as payment up front w a cc guaranteeing a serious purchaser and not a lookie-loo, just read the threads on this site about folks returning stuff, claiming shipping damage or other nonsense.  PayPal and the cc company charge-back policies place virtually all of the risk on the seller, so it's not unreasonable to ask the buyer to pay two-way shipping.  If that does not work for you, you can vote with your feet and your wallet.  Just my $0.02.

"...you seem hell bent on finding negative things to say about Eric’s speakers. Why? If you don’t want to come out of pocket and try them for yourself then move on and enjoy what you have and leave this thread...I feel I have no right to comment on them good or bad and neither do you."
chrshanl37 he has every right to comment here without any interference from you we practice FREE SPEECH on this sight he can say what he likes and if you don't like it you don't have to read it you can also comment to the moderators and ask that his post be deleted but they WILL NOT do that because he is allowed to speak his piece here who are you to tell anyone here to go away or shut up?
Bullitt....If Tekton has very little returns according to the maker then why not offer the product with no cost to ship back to the buyer.If not mistaken one pays for them up front or am I mistaken..the company send speakers without being paid for them,Id say that's an intent to purchase,How is that an abuse to purchase?lol..is that the best you have,reeeeally.
missioncoonery Eric's return policy is very generous. Especially when evaluated against the industry standards. As a manufacturer, you wouldn't want to expose yourself to customers with no intention to purchase. When you ship something to someone, you want them to have some skin in the game. If you can't afford to risk the cost of return shipping, then you can't afford the speakers in my opinion, and Eric shouldn't have to pass along the cost of your I'll intent of abusing a manufacture's generosity. Is this the best argument you can come up with to fault Eric's product and marketing? Really?
missioncoonery with all due respect you seem hell bent on finding negative things to say about Eric’s speakers. Why? If you don’t want to come out of pocket and try them for yourself then move on and enjoy what you have and leave this thread to those that have put up the money or at the very least have heard these speakers. Judging from the posters here and the amount of gear they have owned I find it difficult to believe these are a flash in the pan flavor of the day.

I don’t have a dog in this fight as I’m not an owner of Tekton speakers but I am mighty tempted to get the DI monitors after reading through the recent threads. Until that day comes I feel I have no right to comment on them good or bad and neither do you.
Eric.....If you have few buyers returning speakers then why don't you simply take them back on your dime.If what you say is true seems a no brainer as that's one of your stumbling blocks with me.I would also like to see reputable stereo mags review what you offer.Seems like a positive way to convince those on the fence.
And James... your ears are not "being tricked". This is real my friend. This is real quantifiable science and forward thinking innovation.
I've said for decades loudspeakers are musical instruments. Why we clump them into a branch of electronics is a big mistake.

A bit of exploration and one will discover Tekton and ZU have about zero in common. We'll, I guess we're both in Utah but we certainly don't emulate each other. We have differing audio philosophy across the board. Sean Casey is my freind of upwards of 30 years now and we worked together daily for years - a great friend and professional. Truth be told, we taught each other a ton of stuff. 

Eric Alexander - audio designer 


Yesterday while evaluating DI’s my friend said "I can’t quantify it but they are the best speakers I have ever heard. They are musical instruments"

To me this rings true. When I switch to one of my other speakers I am back to the DI’s in less than an hour no matter how good the other speaker measures in room. At the very least my brain is being tricked by what I am hearing and I couldn’t be happier with the result. If I saw a thread revealing a "gotcha" moment exposing bad measurements it wouldn't change my feelings about the product. 
I think that this thread has been very helpful. Tekton is a lot like ZU Audio. Very unique designs that are well reviewed and award winning. Having said that, there are flaws and warts in every design. Not every speaker is right for every application so I think it's okay for folks to have concerns before they buy a product without hearing it first. Otherwise, this becomes the Church of Tekton. ;-)
Thanks Kenny!

And there's literally hundreds more just like you. Thousands more if you wrap the full Tekton lineup into the equation.

If people saw our rate of return for the DI's they'd be shocked! That topic alone speaks volumes of truth as to what this speaker is and does. Regarding rates of returns... I'm not saying.

We're not a mainstream company, we cater to audiophiles and music industry professionals, and with a demographic like this, we've got the most discerning and critical evaluators on earth. Fact is, they appreciate and like what we do.

I've discerned over the years, the biggest gripe the critical types have with me is my decision to not publish measurements and/or extremely detailed loudspeaker specs. This really sends the tweakers into orbit! I design and build 'audio engine's'. Roger Penski, an internal combustion racing engine master said: "If you say anything to anyone, it's like cutting your paycheck in half." I appreciate his sentiment and wisdom.

Eric Alexander - audio designer
Eric,

"For the record: the DI loudspeaker is a gamechanger and it's here to stay folks! "

That's right and only getting better but some folks just won't try them for their various reasons,and that's their loss.

I took a chance with the DI's myself and from the first day I knew I had something special and on the 3rd day I was throwing the boxes and packing away,just happened to be thrash day at my house.

I took a even bigger chance when I bought a ps audio direct stream dac,without ever hearing one,that just like my Linear tube audio gear and First watt amps are going nowhere.

Kenny.
Respectfully, this thread is pathetic.

With over 30 years experience, 65 commercially available designs under my belt... the garnering of many 'product of the year' type loudspeaker awards... many years of compelling professional and amateur reviews and we're still seeing stuff like this pop up on occasion. How sad.

Respectfully, do you really think I'd bring a product to market that contained the showstopping flaws you've accused me of?! It's so sad to see people attempting to trash a product they've never heard nor would ever own. Its irresponsible to trash something being spoken about in a positive light that you don't personally have your hands on.

For the record: the DI loudspeaker is a gamechanger and it's here to stay folks!

Do you want to hear every nuanced detail contained within your favorite tracks, or just some of it, and at the very best with some other brand simply most of it...?! If you want to hear it all that's what we do.

This speaker is linear and accurate, this alone short-circuits the comb-filtering accusations. And yes, it knocks off some very expensive heavyweight loudspeaker models and I've got a pile of documentation that proves this too. 

Listen to the loudspeaker and judge for yourselves. And focus on this... the Tekton DI's have 4 patented design elements that have never before been applied to a loudspeaker and they sound amazing! 

Eric Alexander - audio designer


I would definitely like to see a comparison of the Electrons and DIs from someone....anybody?

"I honestly would rather read a review on the Electron speaker and or the DI monitor speaker,that would be much closer to the DI's"

 I agree with you,lets see a review of these DIs in a stereo mag not some  home theater with all the specs fleshed out.Since we cant hear them without buying them seems that would be the way to go.Could and guessing would make us "30k killer" non believers shut up and go buy them.

Kenny,
I agree that the 800hz crossover point, along with the distance the woofer is away from the other drivers could be a bit of a problem. Maybe the low mounting of the 8" woofer was used to extend the lower frequency of that driver using the floor for some boundary reinforcement. The compromise, I would believe, be in the lower midrange. I couldn't imagine this speaker sounding anything like the DI's.....IMO
Tim

missioncoonery, you may not consider $9,000 speakers high end but many of us out there do. To each his own.

What do you have in your system?


grannyring,

I read the review again just for clarification for me,
Overall I found the review kinda spotty and not that easy to understand the reviewers overall thoughts.He has the spec wrong on the sensitivity,the brilliance is rated 94db at 2.83 volts at 1M and not 94db 1w at 1M.

In my personal and experienced opinion the brilliance and the DI's are like comparing apples to oranges overall,I Offcourse have not had the chance to hear the brilliance speaker but I have heard the pendragon and wasn't that impressed.But as you know I truly love the sound I'm getting from my DI's.

The reviewer had a non upgraded pair which could be a huge difference in sound when he spoke of etched treble response,a upgraded crossover would probably take care of that issue,the bottom line in his review is the ratings he gave at the bottom using a note rating system which shows each category doing well except the fit and finish category.

The obvious difference that I see also is the single 8 inch woofer plays all the way up to 800hz and you are going to get a lot of voice at that frequency range and the woofer is so far away from the other drivers.This is a speaker you probably would want to sit 10ft or more away from to get the most coherent sound.

Remember the Di woofers are crossed at 250 hz and very little voice is going to be in that frequency range,just a thought.I honestly would rather read a review on the Electron speaker and or the DI monitor speaker,that would be much closer to the DI's.

Kenny.


grannyring,

You bring up some good questions related to this review,
I will have to read it again more thoughts to follow.

Kenny.
I stand corrected.Having said that I dont know Odyssey or Kismet but I certainly wouldnt call the 804s as high end.
Where in that quote do you come up with midfi? I use my DIs for HT & 2ch just as I used my B&W 804s for both HT and 2ch before the Tektons unseated them. I'm about to add Odyssey Candela pre and Kismet Reference power amp pieces to the same HT front end. The Candela allows a pass-through mode for HT applications. Best of both worlds. Using the Odyssey pieces in HT certainly doesn't make it midfi.

"My guess is that the Brilliance is geared more towards 2 channel in a medium room and the DI is more geared towards larger rooms and home theater"...

LIghten up Bullitt,Im just asking is this what were are now discussing of have been . I was under the impression these speakers were giant killers replacing 30K speakers

I don't know who called these midfi speakers, but that is a minority report if that is something from an owner. You really, really want to find fault with this product, don't you? I just can't figure out why that is.
I guess I was confused.The Tekton website states their speakers are giant killers replacing 30k speakers .Im thinkiing Vivid ,TidaL,Lumenwhite,Kharma,Marten on and on.Even a poster here said he had 30k to spend and bought the DIs.....and now your saying these are midfi intended for home theater?
Interesting review. I was a bit taken back when the reviewer said that folks who like Harbeth, Audio Note, and Acoustic Vienna speakers would not find the Tekton Brilliance sound to their liking? I owned two of the three and loved them. Big fan of Harbeth in particular. I love how easy they are to listen to. Never aggressive or in your face. Always musical and composed. Audio Note speakers are also supremely musical.

What is is the point by the reviewer here? The Tekton design is not those things? It is much more lively and too pumped up for us Harbeth lovers? He also started the review with a big question mark that he really never sorted out well for us. The speaker went from sounding broken to amazing with no changes, burn in.......no real explanation other than his ears got used to them I suppose.

Then his friend really did not like the speakers from his initial listen and did not change his mind.

Contemplating the review one could easily, and reasonably, conclude that these speakers can be polarizing due to their additional brilliance and lively personality. Wonder how true this is for the DI? Love to hear more comments on this.

I least that that is how I read the review.

The Tekton Brilliance was reviewed today. Same price as the DI. It's smaller and doesn't play as low, but the price is the same. Why have 2 floor standers at the same price? My guess is that the Brilliance is geared more towards 2 channel in a medium room and the DI is more geared towards larger rooms and home theater. 

http://www.enjoythemusic.com/magazine/equipment/0817/Tekton_Design_Brilliance_Loudspeaker_Review.htm
It always seems like an unfortunate use of this or any other forum when the conversation deteriorates into personal criticisms of other posters. The DIs may be Great speakers to some and not so great to others, We are all going to form our opinions on whatever information we have available or whatever information, or lack thereof, that we choose. Isn't that something we should all expect - certainly the equipment manufacturers we all discuss expect that we will do this? Some people are going to choose vanilla and some are going to choose chocolate- so what? It is a pursuit that I believe we all seek to enjoy and our differences of opinion are, I think, both healthy and help to drive this industry. We can evaluate and follow, or refuse to follow, each other's opinion based on how reliable we think that opinion is - isn't that what we do with all other bodies of knowledge?