Anyone interested in a 10 x 17 baffle with W.G.

[Pete Schumacher]

Re: Anyone interested in a 10 x 17 baffle with W.G.

I'll jump in for Ed here . . .

Currently, he's up at the Rosenquist homestead in northern Michigan, trying to slay a Bambi or two.

I'm pretty sure he was going to be making a bunch of baffles when he got back later this week.

[tdv]

Re: Anyone interested in a 10 x 17 baffle with W.G.

Ed
Any progress on the waveguide?
Tim

[tdv]

Re: Anyone interested in a 10 x 17 baffle with W.G.

Ed
When you get caught up with things I would take a pair 11" x 22".

Sorry about the unexpected loss of your Mother. Hope time is a source of healing for you and your family.
Tim

[aarond]

Re: Anyone interested in a 10 x 17 baffle with W.G.

D,
Sometimes words aren't enough but I'm sorry for your loss. If I'm not mistaken DIY Chicago is this weekend, I hope that it is a welcome break for you.

I sent a PM, when you get a chance please respond and we can go from there. As we have already discussed, I'm in no hurry due to my situation.

[[email protected]]

Re: Anyone interested in a 10 x 17 baffle with W.G.

That's very sad.

[D, Rose]

Re: Anyone interested in a 10 x 17 baffle with W.G.

Hey guys. Sorry for the horrible delay. Petes been trying to cover for me. I don't need to get too much into it, but I've just made it back from Arizona. I lost my mom, very unexpectedly, and its been tough.
I plan on bringing baffles with wave guides to the Chicago DIY. Who wants a set, and what size baffle? I was planning on a standard 10x17, but if someone needs something special, just drop me a note. I'll have to charge a little more for larger sizes. I am giving a set of 10x17s away as a door prize to make up for all the delay. Its gonna be a great show!!!

[[email protected]]

Re: Anyone interested in a 10 x 17 baffle with W.G.

I am also a bit closer to waveguides milled to more exotic configurations on the CNC machine. I should know later this week if the tool path I generated for an elongated waveguide succeeds. If so, this will open up a much richer field of possibilities.

thats great news!

[TN Allen]

Re: Anyone interested in a 10 x 17 baffle with W.G.

[QUOTE=critofur;1776048]
It seems that the interface (the small/back end of the waveguide) between the waveguide & tweeter is quite important and I'm not sure what the criteria are for a good design.... But, it seems likely that given something to evaluate you might well suggest improved criteria and configurations.

I'm happy to take measurements, maybe willing to try other tweeters if requested, and, there are a few different woofers I have in mind/inventory that I would be happy to design a crossover for with the wg/tweeter combination:... that's fine do what you think makes sense, modify what I send to suit.


If you sent me a waveguide turned from a porous material...seal it as you find necessary. There is no need to return it.

Perhaps we can start with what I have on hand and can send in a day or so. Given your address, I'll put one in the mail this week. You can look it over and decide what you would suggest to improve it. It's a place to start and I'd be happy to consider suggestions for new turnings.

I don't know enough about the engineering/abstract criteria, but can presently, easily turn round waveguides producing a cross section that is an arc.

I am also a bit closer to waveguides milled to more exotic configurations on the CNC machine. I should know later this week if the tool path I generated for an elongated waveguide succeeds. If so, this will open up a much richer field of possibilities.

I look forward to your response and suggestions. tna

[dantheman]

Re: Anyone interested in a 10 x 17 baffle with W.G.

That could/should make for a very impressive speaker on several fronts. Makes me want to build one. Personally I don't know that I'd want to stray too much from the RS28. It just looks(graphs) too good in that design.


Hmmm,

Dan

[critofur]

Re: Anyone interested in a 10 x 17 baffle with W.G.

I can send one of the waveguides I turned, or turn another if you have a preferred arc and opening for the cross section. I don't have MDF, but have Advantech, which is somewhat porous but could be used to form a mold. I also have Baltic Birch blanks glued up, solid wood is also an option.

These could be temporarily mount in a cabinet, or glued permanently.

Would you be evaluating these as well?

tna

tna

I have an interest in waveguides for XT25TG and/or RS28. I have both of those tweeters and a few others.

It seems that the interface (the small/back end of the waveguide) between the waveguide & tweeter is quite important and I'm not sure what the criteria are for a good design.

I'm happy to take measurements, maybe willing to try other tweeters if requested, and, there are a few different woofers I have in mind/inventory that I would be happy to design a crossover for with the wg/tweeter combination:

Peerless HDS Nomex 6.5", Exodus EX-6.5, Exodus Anarchy, and Seas ER18RNX

If you sent me a waveuide turned from a porous material I would want to fill and sand the surface - perhaps oil based polyurethane, or, some type of sanding sealer. Just about any material would be fine. Avoiding large voids which have to be filled with some kind of paste would be preferable.

I could send some payment, or, just borrow the waveguide(s).

I think concrete would be a good material for producing multiple waveguides inexpensively? Perhaps, made to a size that would fit in the USPS Priority Mail Large or Medium Flat Rate Box? Concrete waveguides might be able to ship two to a box, perhaps? It's OK if they're heavy, as long as the pair is under 20 lbs they can ship for about $10...

[Pete Schumacher]

Re: Anyone interested in a 10 x 17 baffle with W.G.

Nice! So should I order some tweeters now while they are on sale?

Dan

Well, you can see what you have to work with from those plots. The response didn't change all that much when in the baffle pictured above. On the 10x17 baffle, I've no doubt that it will be just as easy to work with. It certainly allows you to cross the RS28F at a very low frequency, allowing you to more easily integrate an 8" woofer into the mix. Why it happened to work so well with the RS28F may be just pure luck.

Not sure how it works with other tweeters just yet, but I'd be shocked if other 26-30mm domes didn't find a home in this profile. The RS28F needs a bit of shaping to smooth back to flat, but it doesn't have to be too complicated from a component count. Other tweeters may need no shaping at all.

The main benefit is the boost at 1KHz over a flat baffle, and how a simple crossover can use the natural response to fashion a 1KHz LR4 acoustic target. The waveguide loading provides almost 15dB benefit over a flat baffle implementation at the low end in terms of linearity and available dynamic range.

[dantheman]

Re: Anyone interested in a 10 x 17 baffle with W.G.

Nice! So should I order some tweeters now while they are on sale?

Dan

[Pete Schumacher]

Re: Anyone interested in a 10 x 17 baffle with W.G.

That would be the one.

[dantheman]

Re: Anyone interested in a 10 x 17 baffle with W.G.

So this is our man then?



Dan

[dantheman]

Re: Anyone interested in a 10 x 17 baffle with W.G.

That tweeter has needed someone to build a WG for it for a long time! I'll search for the thread and the measurements.

thanks,

Dan