Oh thats part of the fun of this hobby. Figuring out how to hide mistakes so they just look part of the design. I too made a ton of mistakes on my build.
Your design looks damn nice. I love the unconventional shape.
Not what you need to hear now Byron, but there are people around here with router jigs for that frame.
No, that is a very specific edge reflector that was designed to direct some of the top woofer down ward. Why must I think for you.
My build. Curved Sides are made from 2 layers of 3/8" birch bending ply. When sandwiched together with half a gallon of Tightbond 3, the curve is extremely strong and rigid.
My first pass at attaching the first layer of the 3/8" birch bending ply left some big gaps. I wanted to throw the whole thing on the firepit, but once I calmed down, it was totally saveable with a bit of modification.
Filled them with epoxy. And epoxyed a 1/4" plywood panel to the top. Oh. And I discovered the arm muscle building joys of working with a japaneses pull saw for flush cuts.
My first pass at attaching the first layer of the 3/8" birch bending ply left some big gaps. I wanted to throw the whole thing on the firepit, but once I calmed down, it was totally saveable with a bit of modification.
Filled them with epoxy. And epoxyed a 1/4" plywood panel to the top. Oh. And I discovered the arm muscle building joys of working with a japaneses pull saw for flush cuts.
Last edited by a moderator:
Absolutely.
Drivers:
2.5way with SB Acoustics Satori drivers
Tweeter: TW29DN-8
Midbass: MW16P-8
Crossover:
Yep. Definitely worth it. I tested it vs several other variations, and kept coming back to it. I was inspired by an old Dynaudio speaker crossover that had 2 of them. I modeled 1 and it worked perfectly to draw in my 2nd order tweeter crossover to be perfectly in phase with the Satori midbass.
Before I used the ladder delay. It was nice but a bit congested in yhe upper freq. After I tried it, it just sounded right.
Also. i tried some combos where I had a 1 to 2 ohm resistor in series with the shunt 0.4mH coil to change the shape of the tweeter rolloff at low freq. In every case I hated it.
Decided to finish my Speedsters, it's only been a year.
Thanks, I think that's the best I've ever done with a spray can.
Thanks for your interest, dear.
The transducers are Beyma KX15. Good speakers. I have also the
P.Audio BM-15CX38 Coaxials but I have been too lazy to swap them, because it is a lot of work....
The R2R are coming back and there are plenty of offers. OTARI and others as you may know.Much Love to All,
M.
Gotta say when I looked at that crossover schematic the letters F, W, T came to mind and not in that order.
S'poze I have some more reading to do.
Hmm... "ladder delay" ...
Here is my latest version of my horn rig. Plan was to use the JMLC Iwata 600 for a tweeter horn but JMLC-1000 sounds so much nicer. I just kept them all, even if the difference between the 600 horn and the 300 horn is negligable, using the same same driver (minus the throat adapter). But if I eventually move to a larger JMLC Iwata 300 horn then I will be happy that I kept the 600 horn in the design, because the sound above 1500 Hz is sweeter than a very large horn.
