A 3 way 99db multi configurable SEOS design - Page 48 - AVS Forum
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post #1411 of 2203 Old 08-06-2014, 09:53 PM
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Originally Posted by gpmbc View Post
Matt did my boards and they look beautiful. I'm glad I placed that portion of the build in more skilled hands. I could see a lot of areas to screw up. Your plan is sound IMO Donny.
You should have posted a pic. Matt is an artist.
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post #1412 of 2203 Old 08-06-2014, 10:58 PM
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post #1413 of 2203 Old 08-06-2014, 11:20 PM
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Man those crossovers look good.
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post #1414 of 2203 Old 08-06-2014, 11:32 PM
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Is the included gasket tape for the waveguide, mids, or both?
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post #1415 of 2203 Old 08-06-2014, 11:37 PM
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I want mine looking that good Ryan! !!
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post #1416 of 2203 Old 08-07-2014, 02:01 AM
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Originally Posted by niktak11 View Post
Is the included gasket tape for the waveguide, mids, or both?
Just the waveguide
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post #1417 of 2203 Old 08-07-2014, 03:01 AM
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Mine came with tape for the mids also.
YMMV
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post #1418 of 2203 Old 08-07-2014, 03:19 AM
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Mine came with tape for the mids also.
YMMV
Oh maybe Erich added that
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post #1419 of 2203 Old 08-07-2014, 04:08 AM
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Quote:
Originally Posted by Potts22 View Post
Erich...Also, will assembled XO be in the future?
See below...

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Originally Posted by gpmbc View Post
Matt did my boards and they look beautiful. I'm glad I placed that portion of the build in more skilled hands. I could see a lot of areas to screw up. Your plan is sound IMO Donny.
That's a big 10-4 on that, gpmbc.
Matt (@mtg90) is a pleasure to work with and handled my 1099 XOs as well.
If anyone would like to see at least one XO set-up done about as well as it can be, swing the parts over to Matt and then work off the completed one as a model for others.
Like yourself, I decided to break the XO into two separate boards....ease and flexibility of installation as well as "shippability".

Enjoy your 1099s, fellas!

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post #1420 of 2203 Old 08-07-2014, 04:58 AM
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Originally Posted by mbyrnes View Post
Oh maybe Erich added that
The mids don't come with gaskets from the manufacturer so I started putting some gasket tape in for the mids. I'm not sure if it's too thick or not, but I don't know where to get any thinner material.
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post #1421 of 2203 Old 08-07-2014, 05:00 AM
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Worked fine for me Erich, thanks.
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post #1422 of 2203 Old 08-07-2014, 05:06 AM
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Quote:
Originally Posted by gpmbc View Post
Very nice!

Can you post pictures of the bottoms?

Can you also post the dimensions of the boards?


Sent from my Nexus 7 using Tapatalk
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post #1423 of 2203 Old 08-07-2014, 06:15 AM - Thread Starter
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I want mine looking that good Ryan! !!
Ha, I'm a hack.
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post #1424 of 2203 Old 08-07-2014, 07:10 AM
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Originally Posted by Potts22 View Post
Hey Tux, how far fetched would a 1599 version be with the new seos-15 and dual 15'' woofers? Im just thinking big here, I will have lots of room behind my screen, I would love to have a sort of wall of speakers!
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Well, there's some problems I'd predict with large mids like that. But Jeff Bagby seemed to find it ok on the Cinema 88. Just take a Cinema 88, buy two 15" woofers and put them above and below. Use a minidsp to cross at 250hz. Bam. Done. Not really optomized, but would rock pretty hard
Lots of people, including Bill Waslo, think the AE TD15m is one of the best mid drivers http://www.diyaudio.com/forums/multi...id-driver.html

Not exactly in the same price range at $329.00 per woofer though
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post #1425 of 2203 Old 08-07-2014, 07:39 AM
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The 15" Deltalite comes very close. Really low distortion.

I think the woofer used in the Cheap Thrills had a smoother FR than the A&E, but not lower distortion.
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post #1426 of 2203 Old 08-07-2014, 07:59 AM
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Quote:
Originally Posted by sslv2pwned View Post
Very nice!

Can you post pictures of the bottoms?

Can you also post the dimensions of the boards?


Sent from my Nexus 7 using Tapatalk
Sorry, they're already in the cabs and getting them out to see the bottom would be quite the task. Not sure on dimensions, maybe Blah450 happened to measure his.
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post #1427 of 2203 Old 08-07-2014, 08:19 AM
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Originally Posted by Erich H View Post
The 15" Deltalite comes very close. Really low distortion.

I think the woofer used in the Cheap Thrills had a smoother FR than the A&E, but not lower distortion.
Even though the deltalite has 5x the Le and a 10% weaker motor?
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post #1428 of 2203 Old 08-07-2014, 08:21 AM - Thread Starter
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Originally Posted by Bassment View Post
the AE TD15m
Quote:
Originally Posted by Erich H View Post
The 15" Deltalite. the woofer used in the Cheap Thrills
All woofers praised for their top end cleanliness, not something required for a 1599. Better to focus on T/S parameters that achieve bass output as a pair of 8s will happily get down to 200hz with insane volume. The bandwidth of the mids would be about 200 to 900hz. That's really quite narrow and in the sweet spot for 8s.

Any measurements of the Cinema 88? I just can't help but think there's a midrange hole like Matt and I got on our similar setups. I mentioned it to Matt here: TD15M - SEOS12 - BMS4550 / theater progress / Dual TD6M - SEOS12 - BMS4550 build. :D

If it does have that hole, then I'd cross in the woofers just below the hole. It really would be the best way to get a 1599. Doing one passively would be a lot of work. But this idea would also require dsp and amps. But if you're building a 1599, that really shouldn't be an issue.

Last edited by tuxedocivic; 08-07-2014 at 08:47 AM.
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post #1429 of 2203 Old 08-07-2014, 08:35 AM
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I didn't say I'd use the 15" Deltalite for the bottom of a 3 way, just saying it's a good woofer.
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post #1430 of 2203 Old 08-07-2014, 08:50 AM - Thread Starter
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I didn't say I'd use the 15" Deltalite for the bottom of a 3 way, just saying it's a good woofer.
Oh. That's true. I was thinking in terms of doing a 1599. For that I'd use something with lots of bass potential.
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post #1431 of 2203 Old 08-07-2014, 08:59 AM
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I meant as basically WTW with no separate mids. Like the Noesis 215. What problems do dual vertical 15" drivers have in the midrange, if crossed over at like 800-1000 hz like the SEOS 15 can?
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post #1432 of 2203 Old 08-07-2014, 09:07 AM - Thread Starter
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Vertical lobing would be high. Best to do a 2.5 way. Big MTMs are hard to do.
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post #1433 of 2203 Old 08-07-2014, 09:23 AM
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I thought the vertical alignment MTM corrected the vertical lobing?

So the only problem with the MTM is the interaction between the woofers that causes different lobing patterns than the tweeter which causes things off-axis to sound different in the mid-frequencies. So if you cross the waveguide low enough, like the SEOS 15 can, along with the woofers as close together as possible, then it's not a big deal because the lobing doesn't happen until a higher frequency than the crossover?

Last edited by Bassment; 08-07-2014 at 09:39 AM.
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post #1434 of 2203 Old 08-07-2014, 09:23 AM
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Quote:
Originally Posted by tuxedocivic View Post
Oh. That's true. I was thinking in terms of doing a 1599. For that I'd use something with lots of bass potential.
Lots of bass potential would be the only reason, for me, to do a 1599 vs the 1099, Im sure the 1099 has plenty of top end output for me!
Dont think Im ready to spend that kinda change on the TD15m's though
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post #1435 of 2203 Old 08-07-2014, 09:24 AM
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Lots of bass potential would be the only reason, for me, to do a 1599 vs the 1099, Im sure the 1099 has plenty of top end output for me!
Dont think Im ready to spend that kinda change on the TD15m's though
Just get the 1099 and then buy some good 18" subs
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post #1436 of 2203 Old 08-07-2014, 09:27 AM
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There are 12" woofers that can put out as much low end bass as many 15" woofers. And they can put out more bass than anyone would ever use in their home, even if you really like midbass.
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post #1437 of 2203 Old 08-07-2014, 09:46 AM - Thread Starter
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Quote:
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I thought the vertical alignment MTM corrected the vertical lobing?

So the only problem with the MTM is the interaction between the woofers that causes different lobing patterns than the tweeter which causes things off-axis to sound different in the mid-frequencies. So if you cross the waveguide low enough, like the SEOS 15 can, along with the woofers as close together as possible, then it's not a big deal because the lobing doesn't happen until a higher frequency than the crossover?
Not quite. You'd have to cross very low. Maybe the BA750 could do it, but doubtful. Maybe 2x12 with SEOS 15 and BA750. 2x12 is plenty anyways.

Using woofers to comb the response is not an easy way to get directivity. Its sounds like a simple thing but it hardly is.
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post #1438 of 2203 Old 08-07-2014, 10:16 AM
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but 12's aren't as cool as 15's

Do you know the equation for calculating the frequency nulls based on woofer spacing, degree off axis and distance from speaker?
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post #1439 of 2203 Old 08-07-2014, 10:28 AM
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but 12's aren't as cool as 15's
If they're the right ones they are.



Tux, the BA-750 and dual 12's has been drawn up and it would work, but if it's done, it would be a while. I don't think there's a big demand for something like that because the center channel wouldn't work very well with the same woofers.
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post #1440 of 2203 Old 08-07-2014, 10:30 AM
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A 1599 or 1299 sounds very cool. I like the way you guys are thinking.
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