Hi crew!
I am at the beginning stages of planning my next build for Burning Amp 2025 (and maybe the Parts Express speaker competition if I can find a way to transport them there.)
The concept I'm exploring is a SLOB (slot-loaded open baffle) with the catch that ALL drivers will fire through the same slot. The slot width will be around the size of the smallest driver, so its impact will be greatest at low frequencies. It is not a MEH (multi-entry horn) but a MES (multi-entry slot) (pronounced "mess" 😛).
I am considering a WWMTMWW arrangement because I really like that in my Aura speakers. Using a wideband driver for the "T" makes it dipole across the whole frequency spectrum. I'm hoping for more bass, higher sensitivity and higher max SPL than the Aura speakers, and considering these drivers:
For the mid & tweet crossover, I am considering running T->M->M in series with a bypass cap across the mids. This means the Wib70_vHP runs fullrange with frequencies below ~640hz being shared equally by all three drivers. My motivation is to get a coherent sound (C-to-C distance < 1/4 wavelength), kinda like Perry Marshall's Bitches Brew, but with a wideband driver instead of a coax (I've yet to find a coax that I like). If the Wib70 can't handle this, I may upgrade to the Wib120 or Wib140 instead, as long as the high frequencies sound good enough.
The top view will look something like this:
For the waveguide and the mounting plate, I will use SendCutSend, with the waveguide looking something like this:
I'll keep everyone posted as the project progresses. The Kartesian drivers are supposed to arrive tonight (finger's crossed!).
Some questions:
I hope this turns into a big MES!
Cheers,
Greg
I am at the beginning stages of planning my next build for Burning Amp 2025 (and maybe the Parts Express speaker competition if I can find a way to transport them there.)
The concept I'm exploring is a SLOB (slot-loaded open baffle) with the catch that ALL drivers will fire through the same slot. The slot width will be around the size of the smallest driver, so its impact will be greatest at low frequencies. It is not a MEH (multi-entry horn) but a MES (multi-entry slot) (pronounced "mess" 😛).
I am considering a WWMTMWW arrangement because I really like that in my Aura speakers. Using a wideband driver for the "T" makes it dipole across the whole frequency spectrum. I'm hoping for more bass, higher sensitivity and higher max SPL than the Aura speakers, and considering these drivers:
- Tweeter: Kartesian Wib70_vHP
- Mids: 2 x Kartesian Wom165_vHE-e2
- Bass: 4 x Peerless XXLS-P835016 10"
For the mid & tweet crossover, I am considering running T->M->M in series with a bypass cap across the mids. This means the Wib70_vHP runs fullrange with frequencies below ~640hz being shared equally by all three drivers. My motivation is to get a coherent sound (C-to-C distance < 1/4 wavelength), kinda like Perry Marshall's Bitches Brew, but with a wideband driver instead of a coax (I've yet to find a coax that I like). If the Wib70 can't handle this, I may upgrade to the Wib120 or Wib140 instead, as long as the high frequencies sound good enough.
The top view will look something like this:
For the waveguide and the mounting plate, I will use SendCutSend, with the waveguide looking something like this:
I'll keep everyone posted as the project progresses. The Kartesian drivers are supposed to arrive tonight (finger's crossed!).
Some questions:
- Has anyone done a build like this?
- What do you think/what would you change?
- For the slot-loading part: How wide should the slot be and how much volume in the compression chamber should there be?
I hope this turns into a big MES!
Cheers,
Greg
Excellent! You've probably modelled the effects of the slot already, and there are some sophisticaed ways of doing that. But if you haven't, and want a quick'n'easy sim, see my thread here: https://www.diyaudio.com/community/...baffle-and-other-woofers.426580/#post-8004549
Oh yes! I saw that thread and it seems very apropos. I will read it more carefully and try to model the slot that way. Thanks! I haven't done any modeling yet, but I have been doing some rudimentary plywood prototyping.