Anarchy/Wavecor MTM

[Erich H]

That Peerless XT25 linked by dcibel fits perfect on the SEOS-8. I knew it would when the waveguide was designed, but couldn't seem to get my hands on one without the face plate for easy mounting. PE just started carrying them, so I was able to glue one together in a couple minutes. There are a few other models/brands that also work, I just got side tracked with different projects and didn't get around to testing them all.

[Pete Schumacher]

https://www.parts-express.com/peerle...-ohm--264-1642

I do believe that's the one.

[nareshseep]

have you guys ever tested a SB26STAC tweeter in a waveguide? Do you think the SEOS8 is a good candidate for this tweeter?

[Pete Schumacher]

have you guys ever tested a SB26STAC tweeter in a waveguide? Do you think the SEOS8 is a good candidate for this tweeter?

That's a very good tweeter and I'd wager it would work quite well in the SEOS-8 provided the removal of the face plate would allow the tweeter to still function.
Looking at the depressed portion of the flange around the tweeter, it might just fit the opening of the SEOS-8. It's very important to have a smooth transition from the faceplate to the guide or you're likely to see some serious response issues up high.

[jhollander]

The SC40 is not the same animal without the back chamber. I've used it in a few designs.

Some XT distortion plots on my Synery horn thread

[ryanbouma]

IME with domes and waveguides, ring radiators almost always give excellent results. The XT25 and the SB29 are both excellent. I just finished testing the XT25BG60 and the video will be up soon with the data in my drop box for people to use. Possibly I should try and adapt a seos 10 or 8 to it and post that data too. Sent from my SGH-I337M using Tapatalk

[Mike220]

Do you need to remove the faceplate on the rs28a on the seos waveguide?

[Pete Schumacher]

Do you need to remove the faceplate on the rs28a on the seos waveguide?

I tested it with the faceplate on and it tested quite well. I don't know how it would perform without the faceplate or even if it can be done. The faceplate of the RS28A has a phase shield included in the mesh dome which may be integral to the excellent performance you see below.

[filmslayer]

please help me to understand why this tweet even needs a guide . i have measurements on flat baffles that look better than this .

[Mike220]

Sorry to go off topic Pete. The tweeter doesnt need a guide it just allows the rs28a to cross at 1k to a 8" or 10" woofer. I ordered 2 rs270P-4 to use in a 2-way approx 1cf cabs. Hopefully they mesh together well.

[Pete Schumacher]

please help me to understand why this tweet even needs a guide . i have measurements on flat baffles that look better than this .

If you don't quite understand what this does for the tweeter, have a look at the results of the 8" 2-way using the B&C 8BG51 and RS28A in SEOS-8.

With the guide, the transfer function for the tweeter is down 15dB further at 1.1KHz than a tweeter without the guide. That means much lower distortion, as well as having a polar response that more closely matches the woofer so that response stays smooth as you move off axis. With this pro style woofer, you can send a boatload of power to the system and have very low thermal compression.

[Pete Schumacher]

Sorry to go off topic Pete. The tweeter doesnt need a guide it just allows the rs28a to cross at 1k to a 8" or 10" woofer. I ordered 2 rs270P-4 to use in a 2-way approx 1cf cabs. Hopefully they mesh together well.

Keep us posted!

[filmslayer]

thanks Pete .

[Mike220]

Keep us posted!

Hopefully i get the drivers they were restocked and a good price. Im sure ill have a few questions at the design phase. I need to make a cool looking cabinet and make some use of my cnc machine.

[Pete Schumacher]

The second cabinet and assorted parts arrived today. Can't wait to get the second set up and running to begin the evaluation with the stereo pair. Parts for crossover tweaks are here too.

Let the fun begin.