Hey guys...we need a little rallying here... - Page 207

And if you can fit the TD12M in this pack, that's even better.

Yes it would!

It would depend on the bracing behind the woofer. The Definimax 12 is 5.32" depth and the TD12M is 6.556"...~1.25". If it's too close to the bracing, a double baffle would pull the woofer away further.

The Definimax's pole vent needs room to breath and shouldn't have a brace up against it anyway.

Yep. Erich accounted for that, so the AE should fit.

Just so everyone knows, there are flat packs for every single kit. I have some of them right now and more on the way.

The CNC guys are a little behind due to a bearing issue and then the flu nailed a few people. Hopefully the SEOS and subwoofer flat packs get done very soon. They should have all been done by now, but the typical unforeseen issues have come up again.

Don't let the boxes slow you down on ordering because the boxes will be shipping separately anyway.


On the A&E, will the same box volume as the sealed Definimax be okay?

I hoping/waiting to see if you do a front panel for TD12's and Daniels. No rush either way for me and didn't want to bug.

I think the 3D file needs a decent amount of work after it's cut. There's work around the throat angle, and roundovers that gets worked on by hand with the original molds.

Both will be done. The TD12's are already underway. Just curious about exact internal volumes so I know which box they will go with.

The AE TD12s needs a 1.7cu ft sealed box for a QTC of 0.703. For a ported design, somewhere around 2.5 - 3 cu ft with a tune around 30hz looks best I think.

Hey Erich, I have ordered a couple of BA-750's from you. I've also sent you an e-mail or two, but haven't got a reply?
I just thought I should ask here in case my e-mails go in your spam filter or something? If your just a bit busy and haven't checked your e-mail lately I fully understand.

Admire the work you do, for way to little pay (You should increase the prices slightly to cut you some financial slack IMO).

I test each BA-750 to get matching pairs. I'll be answering your email today.

Matched pairs? That is awesome and unexpected.

Before you ship anything can we please speak over e-mail. I have another question regarding my order for you.

My plan is using the Ba-750's with a SEOS 18 and dual 8" woofers runing in a cardoid like enclosure, trying to obtain control over dispersion down to about 250-300hz. I'm hoping the Ba-750 in a SEOS 18 will allow me to cross well below 1kHz. 750-850hz would be ideal, Distortion measurements from diysoungroup forums look promising,. I'll be using digital XO, which means I can cross very steep if I like.

I test all CD's and try to match them as close as possible. The 360's are almost always dead on the same from one to the next though. The larger CD's can have some slight differences, which is why I try to match them with each other.

That sounds like a very cool project. Please put up a build thread with measurements on one of the forums when you get to that point. What 8s are you planning to use? How are you building the cardioid cabinet?

Can't wait to see these sub flat packs! I'm holding off cutting my own to see what your going to have.

I second having the mathematical cuts. However I will be cutting by hand at my friends shop.

Waiting til christmas is over to see how the funds are working out to make a purchase of the tempests. Love this thread though!

This is still on the drawing board, so nothing is certain. Especially getting the cardoid cabinet right will be tricky. Inspiration comes from diy audio forums and some comercial speakers: http://www.amphion.fi/en/products/krypton3/ , http://www.gradient.fi/Gradient/Helsinki_1.5.html
Basically a box with open sides, with some kind of resistance material to provide delay.

I've researched alot of 8" drivers. B&C, Beyma, Fatal Pro, PLH, and many others make good 8" drivers, but right now I think I will be using the Jantzen JA8008 HES. Mainly because I can get them from a Norwegian forum friend and they look to fit my criteria.
Below 300hz somewhere I plan on using a quality 18" pro driver and dual passive radiators on the back. I'f I want I can remove a PR and expiriment with cardoid bass aswell.

Here is a concept sketch:

When I have come far enough I will be happy to share whater result I end up with.

That looks like a great idea. I've never considered cardioid for midrange, but I bet it would work great. It will definitely take some testing and experimentation with different openings and resistance, but you should be able to shape things nicely. It would definitely be a good way to get directivity control lower in a smaller footprint. Big thumbs up for the creativity.

I'm pondering the merits of a SEOS-24 + 1.4" 18sound CD, over the 18" SEOS +BA750 I have at the moment. The opportunity to work with a really large horn is attractive, and I'd probably just build two systems.

But practically, in terms of crossing over to a 15TDM, I'm not sure if there's an advantage in a horn that goes lower. Does this improve vocal quality to have a CD playing around 500 Hz or so?

Only one way to find out

But seriously, I doubt many 1,4" CDs will do 500hz. Maybe 600 with steep XO. And you will probably have to look in the higher price ranges. JBL 2452H-sl, TAD4003, or maybe the new 18 sound 1.5" exit drivers.
You might even need a supertweeter since the polars will start to beam above 12kHz, instead of 16kHz with a 1".
But if size and funds are not limiting factors I would be doing that as well.

What can you tell me about the BA-750 / Seos 18" combo? Are you not satisfied with the sound or are you just curious about going bigger means even better? Done any measurements?

i would venture to guess it's the TD12M, since that's what many people have.

So i plan on using the Tempest 12 to use as LCR, what would be the best bet for surrounds? one of the 10in woofer models or?

There is a small error on diysoundgroup.com. When you highlight >Flat Packs and select SEOS Cabinets, it shows nothing. If you select Flat Packs, it shows the 3 SEOS cabinets but not the other flat packs. Subwoofer Cabinets and Speaker Cabinets should also be shown when selecting >Flat Packs. Also, do you plan to sell any rubber feet for the cabinets?

The Radian 835PB looks like it could be a good choice, no?

True, it's tough getting any information out of them.