SEOS-838 waveguide

General
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I picked up a pair of the SEOS-838 waveguides from Cinergy. I didn’t have a specific project for them in mind at the moment, but I’m sure I can come up with something :laughing:. 38mm throat intended for dome tweeters.

These things are super chunky! Very thick material. 5/16" outer flange. 3/8" driver flange. They gave the driver sealing surface a light sanding, and did a good job cleaning up the throat. They only listed glossy finish ones, but sent satin finished ones. No complaint from me, I prefer satin anyway. The dimensions seem a little larger than they list (~8 5/16"W, 4 9/16"H, 2 1/8"D)

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Showing the cleanup done on the throat:

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Cinergy threw in a 3rd one with a note “I added an extra for experimenting”. I’ll use it for testing out different tweeters/mounting. But once I’m done with it I’ll probably bring to InDIY for anyone else interested to use as a test mule.

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Is this WG too old-hat anymore? Or am I going to have to get the beastmode on it before anyone gives a $#@7? :laughing:

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No, the SEOS geometry is great - not too many pro driver ppl here, even though this is made to fit regular tweeter. The only person in here that I know if who has used a SEOS waveguide is Brad (hifiside). DIY audio has quite some fans.

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But yes, please throw the besat mode on to it - 1000hz XO should be great! and do a MTM with the SIG 10’s that would be amazing!

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Looks like @D1PP1N has used em with RS 10": Midwest Audio Club drivers. - Page 9 — MAC/DIY

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I’d been considering getting a pair to go in a 2-way with the Sig10 and the RST28 tweeter. But recently someone shared a link to somasonus who has a 3D printed waveguides specifically for the RST28. Not sure which route I’ll go. Be interested to see what you think of the Seos once you use it

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I did with the original RS28F-4 and RS270P-4 paper 10” woofer. Here is some limited information I posted about it awhile back. WG 2-way design thread. — MAC/DIY Are you local to Chicago @DrewsBrews btw?

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I’m just a little NW of Cincinnati. ~30min south of Parts Express. And apparently ~30min north of where Cinergy ships out of.

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I plan on pairing some RS28A-4 in the SEOS with a pair of 55-5670 in the 1.16 knock downs with a linkwitz transform soon.

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Ah okay, thought you were closer. I figured if it was close you could borrow them to see if you like the waveguides.

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I also brought a SEOS-8 design to Iowa this year, which I called “the Ochos”. They use the SEAS 27FFC tweeter, which bolts right on to the waveguide, and SB Acoustics SB20PFC30-8 (8 inch polymer frame woofer).

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The Dorm Buster speakers!

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Pics or it didn’t happen :stuck_out_tongue:

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It’s a nice WG. I’ve got used it with Dayton RS28a (OG - I believe it was designed for this tweeter) as well as the ScanSpeak metal-nipple ring radiator and (my favorite on this WG, I think) Seas 22TAF wide-surround tweeter.

Works really nicely above a B&C 8BG51.

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Looks like the screw holes line up well enough with the 3dprinted adapters that beastmode or nip ring would mount right up. I need to get some hardware.

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