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Zilch's AK Design Collaborative - Econowave Speaker

Well, Doucanoe and I (and a couple others) spent some time with mine, and what we found were a couple things. the harsh midrange tone I was trying to describe was caused by too much stuffing. The zobel took away too much midrange, although we didn't have the proper values..close, but not spot-on. there's also some resonation going on with the cabinets..I do need to add some more bracing. I also need to adjust my port a little. Those two things, and I should be set!
 
Alrighty!!!! Count me in.....

:banana: Today I join the ranks of the proud e-wavers! :banana:
 

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I used the Daytons....not enough skill here to branch off on my own, so I built em to original plans. A couple of minor differences in values on the crossover, and a hand-wound I-core inductor is as brave as I got.
 
I am about to ewave a pair of OLA (walnut, beveled edge, masonite ring). I did NLA Utilities a couple years back and wanted something with real wood. Anyway I recall some post where Bauhauser was going to redo an OLA baffle in order to bring driver centers closer together. I couldn't find the result. Did it happen? Were there audible improvements over using the original baffle and leaving the gap between the woofer and wave guide?

Thanks,
 
I'm going to have to miss out on the group buy, I've been waiting 3 months for my previous order to get built and it's just not happening. I can't commit any more funds to the cause until I get my pending order filled, no matter how much I'd like to snag some more of the TD drivers. I guess the group buy took a life of it's own and overshadowed the pending orders, maybe he'll be able to get enough material in the group buy to build the group buy drivers and pending orders. Not sure exactly what happened to the $800 I already sent in, but it evidently didn't get converted into drivers.
 
The group buy hasn't consumed much if any time for John. I'm collecting the names/orders. John will be placing orders for the materials based on the list I provide him.
 
Just got my AE TD-series woofer group-buy choice into dnewma04. Time's a runnin' out.

I finally did some rough WinISD based on the TD12 S and M in 4 and 2 cu ft boxes to get an idea:
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RED: AETD12S @ 4 cu ft tuned to 33Hz
GREEN: AETD12S @2 cu ft tuned to 33 Hz
YELLOW: AETD12S @ 2 cu ft sealed

PURPLE: AETD12M @ 4 cu ft tuned to 40 Hz
BLUE: AETD12M @ 2 cu ft tuned to 50 Hz
AQUA: AETD12M @ 2 cu ft sealed

Based on this rough sketch, and what I've seen others do, particularly Parham and thanks to AK member truth seeker for showing plots, I am going with TD12S woofers.
 

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Hi guys.

It's been a while since i've started making my ewg speakers. Deltalite II 2512/Pyle+d220ti combination.

Today i ran into some problems during the testing of the xover generated by PCD. Since i don't have measuring equipment yet, that was the only way to go and make xover that fits these drivers.

On the Deltalite there was 12dB/o (3mH+18uF) and 12dB/o for d220ti (8.2uF+1.2mH). Since there is peak on 2KHz (selenium generates it) i've been forced to put series RLC circuit to flatten it. I did fixed L-pad with Visaton MOX resistors.

If PCD is to be trusted, i've succeeded to get the +/-1.5 dB across the spectar 300Hz-18KHz. Maybe that's the case but i dont know and i can't check for myself.

So the FR graph was perfect. The sound..... was awful. Mids and highs did not exist at all, just bass. You could actually hear when the midbas stops and where the tweeter begins to take over. The image was very muddy. I was very dissapointed but i don't give up easily.

I opened PCD again and tryed to make xover with less inductivity and more capacitance. So, after few attempts i thought i did it (so to speak). 12dB/o for Deltalite but this time 1.2mH+27uF and for d220ti xover was 8.2uF+1.2mH but i got rid of the RLC filter and heavy atenuation was not needed because the sensitivity of midbas was now around 96dB. L-pad for it was now 3ohm series (there is 4.4uF in parallel with this resistor) and 3ohm parallel with tweeter.

The sound improved very much. Speakers could finally breathe with ease. I don't know its real FR graph but i will call a friend of mine that has equipment and measure it.

Music, i tested the speakers with, is:

Big Head Todd and the Monsters - Beautiful World
Chesky records - Ultimate Demonstration Disc
Bohren & der Club of Gore - Sunset Mission

Now, the PCD is showing relatively flat response in both cases but two totally different sounds from same speaker units ? What's the catch ?
 
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I suppose there is a possibility that with your original design, you wired them up wrong and corrected your error when you reconfigured them?
 
Nope :) Checked it and then doublechecked it.

I thought the same thing instant i heard them but (unfortunately) everything was in perfect order.

I say "unfortunately" because then i could explain to myself what was wrong. Now im just stuck thinking that, when it comes to designing xovers for two way speakers, i should always go with less inductivity and more capacitanse to get maximum out of the midbas.
 
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Just started my eWaves. Got the drivers from jackgiff. Putting them in some Barzilay cabinets.

Sent from my SPH-D710 using Tapatalk
 
Jbl 123a?

I just picked up a pair of JBL L100's on the cheap and it looks like about the only thing worth salvaging is the woofers...

I've been searching this thread but I can't seem to find any solid recommendations on driver/waveguide/crossover combo for this woofer.

Should I just start with the basic ewave crossover or does someone have a better suggestion?

One more thing; If I Ewave these how suitable are they going to be for a 15w Eico HF-81. I have no idea what the efficiency of 123a is:dunno: I understand the box is undersized for the woofer so I don't mind building a larger cabinet.
 
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