AVS Group Project......Speaker Name: SEOS Maximus - AVS Forum
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post #1 of 1151 Old 05-15-2014, 07:19 PM - Thread Starter
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The SEOS waveguide was thought up and designed right here on the AVS forum by members much smarter than me. I had a hand in it's general appearance and getting the protoypes done, but if it wasn't for the other forum members the project wouldn't have gone this far.

Things would have been much harder if it wasn't for forum member Bwaslo knowing how to test the prototypes and start designing speakers with them. It was by pure luck that he happened to live 30 minutes away from me instead of 30 hours away. Over the past few years Bill and I have become pretty good friends which helped keep the project moving along. Honestly, I'm not sure how far this would have gone had Bill not been able to help with the testing early on, or the other speaker designers didn't help out with their crossover skills.

In another thread Bwaslo mentioned he was going to be moving soon. I've always wanted to work on a big speaker but the past year just didn't cooperate. So I asked Bill if he had time to work on something before he moved..........of course he has agreed.

I've had a couple ideas but would like to get some input or other ideas on this beast to make sure things go in a direction that other's might be interested in.

A few goals:

#1. 3 way speaker using a SEOS waveguide.
#2. Over the top full range output.
#3. Extreme power handling.
#4. Preferably no taller than 5'.
#5. Must be something unusual and not like other SEOS designs.
#6. Passive crossover.


Even though there's a good chance no one else will build these but me, it would be nice to keep the component prices manageable just in case. I'm not a high roller myself, but no matter how you slice it, this is going to be expensive. I'm thinking $1000 or so for components per speaker might be okay.

Any ideas?
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post #2 of 1151 Old 05-15-2014, 07:21 PM - Thread Starter
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Current Ideas (Fusion-12 on right for size comparisons):




A: Dual 8" B&C midranges and 21" B&C subwoofer. 24.5" x 49" Center of waveguide is 44" up.

B: 12" B&C midrange and 21" B&C subwoofer. 24.5" x 51" Center of waveguide is 46" up.

C: 15" B&C midrange and 21" B&C subwoofer. 24.5" x 53" Center of waveguide is 47.5" up.

D: Dual 8" B&C midranges and dual 18" B&C subwoofers. 22" x 60" Center of waveguide is 36.5" up.







Previous Ideas:

Fusion-8 and Fusion-12 thrown in for size comparisons.





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post #3 of 1151 Old 05-15-2014, 07:27 PM
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post #4 of 1151 Old 05-15-2014, 07:30 PM
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This is awesome. Over the last few weeks or so, things have seemed kind of slow around here to me. I have been thinking "what will the next mega thread be and when will it be showing up?"
Erich, between you and Bill, something completely epic is bound to come from this!
Thanks for all your tremendous efforts! I can't wait to see what comes out of it!
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post #5 of 1151 Old 05-15-2014, 07:32 PM
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Can't wait to see how this turns out. I'll be along for the ride.
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post #6 of 1151 Old 05-15-2014, 07:35 PM
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Can this compete with JTR Noesis 215RT ? tongue.gifbiggrin.gif
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post #7 of 1151 Old 05-15-2014, 07:44 PM
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WMTMW with Celestion FTR18" woofers. That would be the place for economy. I've modeled them and they can get to 30hz very very loud. Use the SEOS 15 and FL450 compression driver.

Mids is the tricky and important part. Maybe 4 x 16ohm B&C 8" mids. XO points around 900 and 400hz. Even lower for the woofers, but passive is tough.

I bet other people build this.
HopefulFred, atabea and Reddig like this.
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post #8 of 1151 Old 05-15-2014, 07:47 PM - Thread Starter
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Quote:
Originally Posted by dtsdig View Post

This is awesome. Over the last few weeks or so, things have seemed kind of slow around here to me. I have been thinking "what will the next mega thread be and when will it be showing up?"
Erich, between you and Bill, something completely epic is bound to come from this!
Thanks for all your tremendous efforts! I can't wait to see what comes out of it!

There are always things going on even if it seems quiet. cool.gif
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post #9 of 1151 Old 05-15-2014, 07:56 PM
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Interesting. ..subscribing now.

Current Gear: PJ – BenQ PE7700; Receiver - Onkyo TX-SR805; Blu Ray - OppoBDP 103; Turntable - Dual CS-515 w/ Ortofon Super OM10; Amplifiers - OdysseyKhartago, Adcom GFA555, QSC RMX 1850HD; PEQ - Behringer FBD2496 [Near FieldSub], miniDSP 2×4 [Flanking Subs], REW; Speakers - 4 Pi (w/B&C DE250/JBL2226H) × 3 [LCR], Yamaha Crap × 2 [surrounds], Exodus Audio Maelstrom-X18" sealed sub [near field sub], LAB-12 based ported sub tuned to 22 Hz x2 [flanking subs, XO set at 40 Hz]
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post #10 of 1151 Old 05-15-2014, 07:57 PM
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Quote:
Originally Posted by tuxedocivic View Post

WMTMW with Celestion FTR18" woofers. That would be the place for economy. I've modeled them and they can get to 30hz very very loud. Use the SEOS 15 and FL450 compression driver.

Mids is the tricky and important part. Maybe 4 x 16ohm B&C 8" mids. XO points around 900 and 400hz. Even lower for the woofers, but passive is tough.

I bet other people build this.
Is it sealed? If ported, can goes lower & deeper down to 18Hz like 215 ?
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post #11 of 1151 Old 05-15-2014, 08:33 PM
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Different you say? Personally I'm intrigued by the idea of a corner horn. Perfect application for a 3-way, and pattern control way down below Schroeder would be cool. Given that Bill's a fan of phantom center, he may be into it.

I'm not into "thumbs upping" or "liking". Don't take it personally. Just assume that I found your post helpful. Unless it wasn't.
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post #12 of 1151 Old 05-15-2014, 08:38 PM
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How about 8pi-style horn loaded mids like Scott Simonion is doing?
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post #13 of 1151 Old 05-15-2014, 08:38 PM
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Full range meaning 15-20hz output, or something more like a 25-30hz corner?
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post #14 of 1151 Old 05-15-2014, 08:46 PM
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I'd like the idea, but would also like a version that doesn't need to to full range
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post #15 of 1151 Old 05-15-2014, 09:02 PM
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how about using a ribbon Waveguide and doing something like one of these http://www.legacyaudio.com/products/fronts-and-mains/
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post #16 of 1151 Old 05-15-2014, 09:07 PM
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A ribbon waveguide would be cool.
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post #17 of 1151 Old 05-15-2014, 09:22 PM
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Too bad the SEOS wave guide doesn't match up to a BMS 4593 or 4594 compression driver, that would make it a very easy 3-way design.
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post #18 of 1151 Old 05-15-2014, 09:22 PM - Thread Starter
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I will post some cheesy drawings soon so you can see the size of these compared to something like the Fusion-12. It's a real eye opener. biggrin.gif

Here were my first 2 ideas:

SEOS-18 with the BA-750 compression driver.

Dual 10" mids directly underneath

Ported 21" B&C subwoofer at the bottom.

Baffle size is 24" x 49". Waveguide is at 44" off the ground.


Idea #2:

SEOS-18 with the BA-750
Dual 10" mids
Dual 18" pro woofers. Likely FaitalPro

This speaker would be set up like the 1099. The only problem is height and where to put the ports. Before ports, the baffle is 22" x 58". Waveguide roughly 35" off the ground.
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post #19 of 1151 Old 05-15-2014, 09:23 PM - Thread Starter
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Quote:
Originally Posted by jbrown15 View Post

Too bad the SEOS wave guide doesn't match up to a BMS 4593 or 4594 compression driver, that would make it a very easy 3-way design.

Two SEOS models can be used with that compression driver. The SEOS-24 and there's a SEOS-18 with a 1.4" throat.

But I don't think that CD will cross over to a 21"pro subwoofer woofer or dual 18's rocking at 3000 watts. wink.gif
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post #20 of 1151 Old 05-15-2014, 09:27 PM
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Originally Posted by Erich H View Post

Two SEOS models can be used with that compression driver.

I thought only then SEOS 24 could be used with them? That's way too big for what I'd be interested in, I was hoping something along the lines of the size of the 18sound XR1464 to keep things a little slimmer. Or the XT1464.
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post #21 of 1151 Old 05-15-2014, 09:29 PM
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Quote:
Originally Posted by Erich H View Post

Two SEOS models can be used with that compression driver. The SEOS-24 and there's a SEOS-18 with a 1.4" throat.

But I don't think that CD will cross over to a 21"pro subwoofer woofer or dual 18's rocking at 3000 watts. wink.gif

True, but it can handle 2000watts.
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post #22 of 1151 Old 05-15-2014, 09:30 PM
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Quote:
Originally Posted by Erich H View Post

I will post some cheesy drawings soon so you can see the size of these compared to something like the Fusion-12. It's a real eye opener. biggrin.gif

Here were my first 2 ideas:

SEOS-18 with the BA-750 compression driver.

Dual 10" mids directly underneath

Ported 21" B&C subwoofer at the bottom.

Baffle size is 24" x 49". Waveguide is at 44" off the ground.


Idea #2:

SEOS-18 with the BA-750
Dual 10" mids
Dual 18" pro woofers. Likely FaitalPro

This speaker would be set up like the 1099. The only problem is height and where to put the ports. Before ports, the baffle is 22" x 58". Waveguide roughly 35" off the ground.

Wow..... I didn't realize you were thinking something that big, you're not messing around...lol
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post #23 of 1151 Old 05-15-2014, 09:36 PM - Thread Starter
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Originally Posted by jbrown15 View Post

True, but it can handle 2000watts.

I'm not so sure it can handle 2000 watts crossed over around 300hz.

Yes, this speaker is going big.......BIG. biggrin.gifbiggrin.gif
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post #24 of 1151 Old 05-15-2014, 09:38 PM
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I'm not so sure it can handle 2000 watts crossed over around 300hz.

Yes, this speaker is going big.......BIG. biggrin.gifbiggrin.gif

I'm not a 100% sure either, but I know some guys are powering their JTR 212HT's with 2000watts per speaker and having no issues.

Someone's going to need a huge room for these bad boys, an LCR setup will take up over 6ft of front wall space!.....LOL
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post #25 of 1151 Old 05-15-2014, 09:39 PM
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cmon Joe, jump in... Need something bigger to keep up with those four monster subs smile.gif
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post #26 of 1151 Old 05-15-2014, 09:42 PM
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cmon Joe, jump in... Need something bigger to keep up with those four monster subs smile.gif

haha, I think I'll have to pass but I'm willing to help you build yours!....lol smile.gif
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post #27 of 1151 Old 05-15-2014, 09:43 PM
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These look very interesting though!

http://www.bmsspeakers.com/index.php?id=bms_4508nd
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post #28 of 1151 Old 05-15-2014, 09:43 PM - Thread Starter
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I'm not a 100% sure either, but I know some guys are powering their JTR 212HT's with 2000watts per speaker and having no issues.

Not.....BIG.....enough! biggrin.gif



Here's a comparison between the Alpha-8 (same size as the Fusion-8) along with the Fusion-12 that some think is kinda big:




Here they are next to SEOS MAXIMUS!


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post #29 of 1151 Old 05-15-2014, 09:45 PM
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OMG eek.gif it's exactly double/ twice the size of Fusion-12 cool.gif
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post #30 of 1151 Old 05-15-2014, 09:46 PM
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These look very interesting though!

http://www.bmsspeakers.com/index.php?id=bms_4508nd

Is that's what in the funk audio speakers coming to your GTG
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