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Hey guys...we need a little rallying here... - Page 174

post #5191 of 9844
Quote:
I have measured ambient air temperature as high as 175F inside a 50L sealed enclosure in the past.

To be most useful it requires we know what the external and drive conditions were at the time this was determined. Were other drivers tested under the same conditions? wink.gif
post #5192 of 9844
The temperature is impressive but hardly surprising when you think about it. Line the walls with fiberglass and you've got an insulated box in which as much as 500W might be dissipated. Fortunately for us, we seldom need to exceed 50W in the home. What is more surprising is that more people (other than Bosso) haven't worked on means of getting that heat out of the box. But why kill the replacement driver business !?!
post #5193 of 9844
Sir bwaslo, any updates on the TD12M design?
post #5194 of 9844
Waiting on a phase plug. Also may need to get Erich to make me a new box, I don't think the driver will fit in the 12" box I have.
post #5195 of 9844
What kind of enclosure are you thinking about for the td12m Bill? Still working on mine, fairly compact, ported at 50hz, f3 ~80hz.
post #5196 of 9844
hadn't really thought. The box isn't much involved in the xover design other than baffling the back wave up higher. What volume are you using?
post #5197 of 9844
1 cu.ft. Front slot port, 1x12x10.
post #5198 of 9844
Erich, you see that?
post #5199 of 9844
Quote:
Originally Posted by robotbunny View Post

1 cu.ft. Front slot port, 1x12x10.

Pictures?
post #5200 of 9844
Sorry, no pics yet Jon_B. Only one is of the baffle on post #5188. I've got the top and bottom cut, just need the middle piece that makes the woofer section the correct volume and the port pieces.
post #5201 of 9844
Quote:
Originally Posted by hometheaterdoc View Post

If you still need the phase plug, I have an extra td12x sitting here in a box. I could unscrew the phase plug (assuming john does not loctite or otherwise glue it down on orders other than the group buy) or I could ship bwaslo the whole woofer. I was going to do that once upon a time anyways before I got distracted with other things. Let me know via PM or email Erich or bull and I will get it on its way.........

Quoting myself for reference... I'm sure there's something vain about that if I think about it long enough...

I *finally* was able to get to Fedex over the weekend to ship the TD12X woofer to BWaslo. Family in town for more than a week and a 4 month old who refuses to sleep at night and now won't nap during the day either consumed my every waking moment.....

He should have it in a couple days. That should help move the TD12M design along and also assist anyone with TD12X woofers since Bill mentioned doing up a quick design for that woofer as well....

My apologies on the delay... hopefully it's of benefit to some of you out there... kudos to Bill for taking on even more work to do some more designs for folks...
post #5202 of 9844
I was just looking at DIYSoundgroup and got a bit confused, from Autotech I got the impression that the poured concrete ones where delivered in matte white only?

This is one of the pictures they sent me:


Could it be ordered matte black without any extra charge?
post #5203 of 9844
madlim, it is my understanding that they can be ordered in other colors. You would need to wait for the subsequent pallet though. I was considering the same thing, I just wasn't ready to pull the trigger yet. As far as the issue of an additional charge, I don't know.

Chris
post #5204 of 9844
I'm still working out details with the poured models. Autotech gave me a price for all sizes about 5 months ago. But in recent emails, I'm not sure they have molds for each size as of now. I know they have the 12, and 15. And also a deeper version of the 10.

They're suppose to send me some more pictures and a price update. I know the price on the 1 piece baffle and the SEOS-15 went up 50%. since I got the original price list.
post #5205 of 9844
Erich-

Did you see the email I sent about my order? I didn't see where I could add some notes to the order so I just emailed them. I haven't heard back and wanted to make sure they didn't get spam filtered.
post #5206 of 9844
Thanks, Erich. Any graphs of the new version would be awesome! Does that mean the seos-10 shape has been improved? I was really hoping to order the seos-10's before this pallet shipped, did I miss the boat?

-Nate
post #5207 of 9844
The SEOS-10 was made deeper as a different design. It's got a different name. Basically it's the SEOS-10 made as deep as the SEOS-12. You didn't miss the opportunity to order anything with the next group buy from Poland. I'm a little bummed that the price for the one piece SEOS-15 baffle went up quite a bit. But I knew it would happen.



Coctostan, I did get your email late and will reply before packaging things up. No big deal.



Some new news today. I picked up the sample crossover boards from DHL today. They look really nice and professional. I say 'sample', but I still had to order about 100, I can't recall. They cost about $1000 because they charge a design fee, and then shipping isn't pretty. I would have ordered more to lower the price down per board (dividing the design fee over more pieces), but Bwalso has to make sure the design is good first.

If the design has a problem and they can't be used, maybe I will list them as "special made" drink coasters for $5 each! Or as Bwaslo said, they could be used as ice scrappers. So drink coasters for you southern folks, and ice scrappers for the northern folks! biggrin.gifbiggrin.gif

Of course, if they work out okay, then I will order some more. I have to say, it put a smile on my face when I opened them and thought 'The DIY Community is stepping things up a notch!"

I will try to get some photos up this evening if I have time. This is going to be a very busy week at work, but my work year is almost over. Then it's 100% audio!
post #5208 of 9844
Quote:
Originally Posted by Erich H View Post

my work year is almost over. Then it's 100% audio!

Lucky!! smile.gif

Thanks again for all the heavy lifting!
post #5209 of 9844
Geez that's expensive. Maybe I just think that cause I don't really get the purpose of them. This is the guy that just glues them to the bottom of the cabinet and does point to point wiring. Actually, I rarely get past using jumpers eek.gif

So what are these for? Premade cross overs? Labelled cross overs?
post #5210 of 9844
Erich, that whole post is dripping with awesomeness. What drivers have been tested with the new waveguide? Lower crossover point than the seos-10?
post #5211 of 9844
The boards might have been about $800. But I can't recall if that counted shipping or not. I think they will be cheaper in the future because the shipping rate and design would be divided out over a larger number.

These are BIG boards. Well, they seem that way to me. But Mr. Bwaslo drew them out so they could actually be used with multiple designs. But my knowledge of it ends there. I can say that one board is for the CD and one is for the woofer.

When I said design fee, I'm not sure if I explained that very good. Bwaslo did the design work for free, but the manufacturer charges a fee to layout the design for assembly.

These will be used for completed/assembled crossover boards, or boards to help people lay things out easier.

Robotbunny, the deeper SEOS-10 model can probably be crossed lower. But not lower than the SEOS-12, so if it's used with a 10" woofer, you likely wouldn't need it crossed much lower than the regular SEOS-10.
post #5212 of 9844
If mouth and throat size are the same, but length is greater, I'd assume the pattern is narrower, no? In the conical based horns, the wall angle is pretty much the radiation angle.
post #5213 of 9844
Quote:
Originally Posted by rajacat View Post

Big Azz is no exaggeration as these are very large and heavy (10 lbs each)eek.gif

I don't buy it. I was holding these things a few hours ago and i could have sworn they were double that weight.
post #5214 of 9844
Thanks, Erich. I'd like to order a pair of poured seos-10's in black, sent you an email but wasn't sure how to set up the order and pay. Not sure what cd yet, but I'll pair it with the td10m for surround duty. I'll be using the bms-4550 with the seos-12's up front, any suggestions? Been simulating a .6 cubic foot enclosure ~68hz tune, f3 ~80hz. Hard to stay on target with my mains, but a fellow avs member is selling me his GB td10's. biggrin.gif
post #5215 of 9844
Quote:
Originally Posted by bwaslo View Post

If mouth and throat size are the same, but length is greater, I'd assume the pattern is narrower, no? In the conical based horns, the wall angle is pretty much the radiation angle.


Doesn't really look much different:

Seos AT1:

http://horns.pl/seosat.html

Seos 10:

http://horns.pl/seos10.html

Seos 12:

http://horns.pl/seos12.html
post #5216 of 9844
I thought I had posted a reply already, but it looks like the AT1 simply has less horizontal roundover (or I should say the roundover transitions more quickly).
post #5217 of 9844
The past 2 weeks have been extremely busy for me at work with some unexpected, very short notice jobs. But they're now done. I do have to catch up on packaging orders that have been awhile. Sorry about that if anyone is waiting. I simply couldn't get to them this past week working from morning until dark virtually every day.

More SEOS progress was made yesterday. I went over to Bwaslo's house with a speaker I had been working on for about a month. It's going to fall in the 'crazy low' price category. But it sounds very good.

We listened to it for a while, then took measurements. I was initially going to change out a resistor, but he suggested a slight change in a capacitor and the resistor. Long story short, after a few tweaks, testing, tweaks......we have a well priced winner that will come in around $200.......with the cabinet! Maybe around $165 for all the parts and $175 - $180 with all parts and just the baffle, I still need to add things up to be sure though. That's with a 10" Eminence woofer and a new compression driver extremely similar to a DE10.

I listened to just one of these again today for about 45 minutes and I'd say this will be the best bang for the buck speaker you can build. Very efficient too. Everything seemed to match up very well. Bwaslo can probably give more technical terms later on. I'm heading back out to package up more stuff for people.
post #5218 of 9844
Erich H,

The following sounds VERY interesting:

"More SEOS progress was made yesterday. I went over to Bwaslo's house with a speaker I had been working on for about a month. It's going to fall in the 'crazy low' price category. But it sounds very good.We listened to it for a while, then took measurements. I was initially going to change out a resistor, but he suggested a slight change in a capacitor and the resistor. Long story short, after a few tweaks, testing, tweaks......we have a well priced winner that will come in around $200.......with the cabinet! Maybe around $165 for all the parts and $175 - $180 with all parts and just the baffle, I still need to add things up to be sure though. That's with a 10" Eminence woofer and a new compression driver extremely similar to a DE10"

If this does indeed come together; count me in smile.gif

In the meantime - glad to hear you are staying busy enough smile.gif in the work department
post #5219 of 9844
Quote:
Originally Posted by cuzed2 View Post

Erich H,

If this does indeed come together; count me in smile.gif
In the meantime - glad to hear you are staying busy enough smile.gif in the work department


It's definitely done and the CD's have already shipped. biggrin.gif I asked them to ship 24 of them by express just so I could get things ready to go before the whole order arrives.


As mentioned in another thread, I also ordered a piece of equipment a while ago and it should be here soon. In the meantime I'm going to continue packaging up everyone's orders and waiting for the other designs to be completed. At some point very soon, once I know when many of these designs are 100% ready, I'm going to shut the site down to regroup and get things organized. I'm getting help to make the website better and set things up differently.

While the site is down and no orders are coming in, it will give me extra time to package up 10-20 of each speaker design and have them ready to go when someone orders. My sister will be helping with that.

I've talked with some of the designers about adding in a little to the price to cover advertising on AVS or other sites as well. I'm guessing just a few dollars per design should cover that, maybe less. Things could get pretty interesting if it comes together as planned.
post #5220 of 9844
Erich's new speaker is quite nice. And it IS Erich's... He picked the drivers, arranged for import of the tweeter, started with an existing commercial xover, figured the box and ports... I even told him it wouldn't work out! But the crossover only needed some tweaks and the whole thing works. Not as smooth as a complicated circuit, of course, but I'm not sure anyone would really notice that. It has good efficiency (around 95dB/W/m). And most surprisingly, it has near linear phase response - the phase above 150Hz or so never "wraps", so the impulse response is very tight. Erich will tell you it was pure luck (not sure he even follows what linear phase means)... It was a happy coincidence of horn and driver depths and the type of crossover. But really, not many speakers can make the claim.

I may switch to using these as my rear channels, as this weekend I got my coSynes (diy Synergy speakers) redesigned to be linear phase after a lot of work!. Don't know if that is really important or not, but it is at least more intellectually reassuring to know that waveforms will be more correct!

Anyway, it looks like four of Erich's new design plus a few subs would make a kick ass HT or music system to play way above the price class. I'm impresses.
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