Why aren't there more waveguide tweeters?

[Erich H]

Re: Why aren't there more waveguide tweeters?

Thanks for the info guys.

Pete, thanks for that thread, I've started reading it, learning lots. Hope you guys can get something together. So far that looks great.

Eric, a seos 6 sounds great! Except, not to sound rude, but the prices don't match my goals :( http://www.diysoundgroup.com/AutotechGroupBuy.htm

The seos 10 isn't listed, and maybe the 6 would be cheaper. So I may be wrong. I've been following your efforts over on avs though, and really wanted to grab a couple mfw15s. Your support is appreciated, regardless of the prices

Look forward to hearing about the seos 6 though!

The pricing will not be bad on those. Pricing on the SEOS models will be cheaper once the company in the US finally gets me their products.

I haven't updated that website because I'm working on a new one.

[fntn]

Re: Why aren't there more waveguide tweeters?

For what it's worth, I have a SEOS-6 coming soon. I can send it to someone for testing when it arrives. The fiberglass company has been VERY slow to get the other sizes started. I may have to switch companies and look for someone else.

Is that the folks in Poland? I thought they had a pretty good turn around time and the quality was first rate?

[Erich H]

Re: Why aren't there more waveguide tweeters?

Is that the folks in Poland? I thought they had a pretty good turn around time and the quality was first rate?

When the SEOS was designed over on AVS, I promised to get prototypes made I contacted the company in Poland and 2 companies in the US.

The photos on that website are the items from Poland. Turn around is okay, but those group buys still take a couple months. I'm only helping with the group buys on those. They price them so that the pallet shipping is covered from Poland.....which is crazy expensive.

I have samples from the company in the US which I took to a fiberglass company. They have taken WAY too long to get parts made. There's also the possibility of plastic ones being made up for much cheaper.

[fntn]

Re: Why aren't there more waveguide tweeters?

There's also the possibility of plastic ones being made up for much cheaper.

Fiberglass can definitely be sexier if it's polished up but plain old ABS plastic would probably suit most folks in this economy.

Any news on what happened to MCM's 6 incher? I only have four of them left. :(

[ryanbouma]

Re: Why aren't there more waveguide tweeters?

Eric, I nearly posted this over on avs (my user name is tuxedocivic over there). Basically, I want to make an almost as high effeciency as the popular pro stuff over there, with smaller form factor, with typical easy to get parts, that are still hifi-ish. That way it could possibly be cheap, and easy to build, and wives wouldn't mind them :D

If it turned out, I planned on sharing the design.

When the SEOS 6 comes in, I'd be interested in buying 1 to see how it measures with some domes. Again though, I'm looking to make this very budget friendly and your waveguides are pretty nice ;)

[billschu]

Re: Why aren't there more waveguide tweeters?

I've used the 6" elliptical waveguide with a Vifa tweeter and the Dayton ND16 tweeter. The Dayton tweeter worked better but it's really hard to get two of them to match in frequency response. Out of 6 Dayton ND16's I bought I couldn't find two that matched in a test baffle.

The nice thing about the Dayton ND16 is that it can be plopped in from the back and held in with RTV or silicone sealant and it just needs a cap somewhere between 1.5 and 2.7 uf to get flat response down to about 2.6Khz where it shuts off pretty quickly. One caveat is that the response of the tweeter itself needs a small boost with respect to the midwoofer at 1m in order to get the power response correct because of it's limited interaction with the room.

Bill

Edit - the Dayton 8" waveguide keeps tempting me. Just seems not quite right. Anyone get any good results from using it with a cheap dome? Seems to me, a $10 waveguide + a $20 dome tweeter could = a killer tweeter. Soo big though :o

And how about the 6 x 6 elliptical? http://www.parts-express.com/pe/show...number=270-316

[Pallas]

Re: Why aren't there more waveguide tweeters?

For what it's worth, I have a SEOS-6 coming soon. I can send it to someone for testing when it arrives. The fiberglass company has been VERY slow to get the other sizes started. I may have to switch companies and look for someone else.

Interesting. Is there a specific tweeter for which it's designed, to avoid reflections at the mouth?

[Pete Schumacher]

Re: Why aren't there more waveguide tweeters?

Edit - the Dayton 8" waveguide keeps tempting me. Just seems not quite right. Anyone get any good results from using it with a cheap dome? Seems to me, a $10 waveguide + a $20 dome tweeter could = a killer tweeter. Soo big though :o

And how about the 6 x 6 elliptical? http://www.parts-express.com/pe/show...number=270-316

Over on Zaph's blog page, he's done an experiment using the SB29 and the PE 8" guide. Not bad at all really. Little junk up in the last octave, but there is a fix for that as well. Felt rings used as a gasket between the guide and tweeter can help in that respect.

[ryanbouma]

Re: Why aren't there more waveguide tweeters?

down to about 2.6Khz where it shuts off pretty quickly.
Bill

Dang, too high. Thanks for the feedback though.

[ryanbouma]

Re: Why aren't there more waveguide tweeters?

SB29 and the PE 8" guide.

Hmm, that does look nice.

Any idea how much you'll be charging for what ever creation you guys come up with? I haven't read the whole thread, but haven't seen any pricing either.

[billschu]

Re: Why aren't there more waveguide tweeters?

That's about as low as you can go with the 6" elliptical waveguide before it takes on some of the negatives of waveguides such as a honky sound in my humble opinion.

Dang, too high. Thanks for the feedback though.

[GranteedEV]

Re: Why aren't there more waveguide tweeters?

Interesting. Is there a specific tweeter for which it's designed, to avoid reflections at the mouth?

I'd love if there were a 3/4" compression driver that could mount in there.

3/4" CD
AE TD6.5
AE TS15S

:D

[Taterworks]

Re: Why aren't there more waveguide tweeters?

Parts Express offers an interchangeable truncated faceplate for their Usher-built RS-series tweeters. I wonder why they haven't designed an interchangeable waveguide faceplate, since it's very easy to swap the faceplates. It seems there would be enough demand for them, and they'd have the waveguide-dome product category all sewn up.

[Pete Schumacher]

Re: Why aren't there more waveguide tweeters?

Hmm, that does look nice.

Any idea how much you'll be charging for what ever creation you guys come up with? I haven't read the whole thread, but haven't seen any pricing either.

I can't say for sure. I'll let Ed figure out his time commitment to each piece before I'd speak for what he'd like. I know others are looking into having the guides duplicated as a bolt on. I personally like the way the WG looks carved directly into the baffle.

[Pallas]

Re: Why aren't there more waveguide tweeters?

I'd love if there were a 3/4" compression driver that could mount in there.

3/4" CD

Doesn't B&C have a .75" CD?

http://www.bcspeakers.com/product.php?id=0000000192

Also, I think a dome with a flattish profile and a "snout," such as the Aura NT1 would be ideal. Though for output reasons a 1" dome may be preferable.

Parts Express offers an interchangeable truncated faceplate for their Usher-built RS-series tweeters. I wonder why they haven't designed an interchangeable waveguide faceplate, since it's very easy to swap the faceplates. It seems there would be enough demand for them, and they'd have the waveguide-dome product category all sewn up.

Agreed. I know I'd buy three to tinker with.

I personally like the way the WG looks carved directly into the baffle.

Me too, and that's definitely the lowest-diffraction solution. However, many people who can do the math can't execute the woodwork, and many people who can skillfully execute the woodwork can't do the math. That approach also makes experimentation more expensive.