Progress on the Open Baffle, Line Array, Econo Wave -- pix

[djn]

George and I spent yesterday building a pair of Open Baffle, Line Array, EconoWaves. He got here at 11:00 and left at around 5:00. I think we made good progress. But we were both tired when we assemble the second speaker.....can you see the mistake. It will be fixed today when I finsh the wiring.

The drivers are PE 69 cent NSB close outs.

The horns are JBL 6"x6" wave guides with Selenium D210T

The cross overs are stock eWave

They ar 48" tall and 24" wide.

George is the tall old white guy and I am the shorter fat old white guy. Who says old white guys don't know how to have fun.

[jerryo]

So..................come on djn, what do they sound like? Don't keep us in suspense any longer!

Cheers

[djn]

Hey Jerry. We stopped last night before wireing them and building the crossovers. That is what I am doing now. I'll let you know how they sound by days end.

[Pano]

Oops! Flip it?

Nice drill press, looks big and sturdy.

[dantheman]

Very cool build. Have you thought about putting the tweeters in that hole near the middle? I think they'll sound better that way.

On a serious note, have you thought about what the width is going to do to the polar response? My experience tells me you'll have a lot of trouble getting those to sound right with that width. YMMV, but I have doubts.

Good Luck,

Dan

[ZilchLab]

Steer them with group delay....

[gvimhoof]

just flip em and let us know how they sound!

[djn]

I finshed the first one at about noon today, and hooked it up and have been playing it since as I finish the second one. I can't find the L pad for the second one and I am tired and done for the night. I am running the one with a boombox, but even with that, I think they sound very good. I did not expect much out of this project and am pleasently surprised. There is good enough bass but I have three subs in my room so that is not an issue. The midrange is absolutely fluid. The smoothist I've every heard and with just the mids acting as OB, wood instruments sound very live. The wave guide is exacting and well detailed without being fatiguing. They do start rolling off a bit to low though. I know the Selenium D220T goes higher. I have friends in the area that have those drivers so we will be doing some swapping this week.

They look kind of cool and I have some red stain I will be staining them with. My wife and I were just out in the garage listening to them and she thinks they are the best speakers Ive ever built.

More to come as I get the second one done and tweek them throughtout the week. Cheers.

[djn]

Originally Posted by dantheman

Very cool build. Have you thought about putting the tweeters in that hole near the middle? I think they'll sound better that way.

On a serious note, have you thought about what the width is going to do to the polar response? My experience tells me you'll have a lot of trouble getting those to sound right with that width. YMMV, but I have doubts.

Good Luck,

Dan

I used the EDGE program to sim these and going that wide is the only way to flaten the responce without using the EQ circuit. It is a 24" wide board and I can cut it down the middle and fold the blank side back into an "L" shape and still be effectively 24" wide.

I don't really know what a polar responce is so I can't comment.

Originally Posted by ZilchLab

Steer them with group delay....

I don't understand that Z. You know, I am more of a building and don't really know much.

Originally Posted by gvimhoof

just flip em and let us know how they sound!

I took the time and made the mirror today.

[dantheman]

A polar response is just a FR made in several axis.

Example: here's a relatively pretty one from 0-90 degrees in 11.25 degree steps:

an0ther:


Dan