Here's an update with 4x10 config. This looks better than the previous 4x12 config I showed previously. Black curve is for 4x Beyma 10MC700ND at 700W each, grey cure is with 4x B&C 10NW76 at 400W each (RMS ratings for those drivers). This is 40in tall x 22in deep x 23.5in wide at the front, 11in wide at the back. Weight estimate is 112 lbs or 51kg if using 15mm BB. Using Lite Ply and/or sandwich panels, this could possibly come down another 30 lbs or so.
Chris -Robert, just wondering if this plan ever went any further than here? It’s a great design. I have sourced the 464 horn and drivers. Now I’m looking for the best box design possible (ie a PM90 but with the 464).
I may one day steal that as a band name..."...analysis paralysis.".
- Robert
Chris -
Nope, that design hasn't gone anywhere since then. That was a fun exercise, but it's too large for my needs. @Nicco Cerve was going to have a go at it, but I'm not sure where he's at with that. I'd be happy to email you the geometry files if you'd like. Or could tweak the model if there's something you want to change. It's mostly sorta-kinda parametric, so it should be relatively easy to update.
I've got a pair of DCX464 and HF950, and I'll likely build a PM90-ish sorta thing. My projects typically have an embarrassingly long gestation period due to both time poverty and analysis paralysis.
- Robert
I don't have drawings, just 3D CAD at the moment. Would you have the pieces CNC cut? Or would you use normal human tools? I'll go back and have another look and see what it would take to make some drawings. All I ask is you call it a RL464 .Robert Thanks. I would be interested in seeing those drawings. I don’t personally have the talent to turn them into actual plans and measurements to make sawdust from but I’m sure I could find someone. The design looks very promising and exactly what I was looking for, a big PM464!
I don't have drawings, just 3D CAD at the moment. Would you have the pieces CNC cut? Or would you use normal human tools? I'll go back and have another look and see what it would take to make some drawings. All I ask is you call it a RL464 .
What drivers were you going to use?
Hello,Chris -
Nope, that design hasn't gone anywhere since then. That was a fun exercise, but it's too large for my needs. @Nicco Cerve was going to have a go at it, but I'm not sure where he's at with that. I'd be happy to email you the geometry files if you'd like. Or could tweak the model if there's something you want to change. It's mostly sorta-kinda parametric, so it should be relatively easy to update.
I've got a pair of DCX464 and HF950, and I'll likely build a PM90-ish sorta thing. My projects typically have an embarrassingly long gestation period due to both time poverty and analysis paralysis.
- Robert
Hello,
Sorry i just saw the recent developments.
I'm currently working on @Robert Lawson's model.
I'm modeling it as a single horn sealed back cabinet, instead of 4 parallel woofers in a vented enclosure.
So i changed Ap and LPT to Ap1 and Lp and divided all volumes by 4, while switching to 1pi.
The horn design itself is good to me, with filtering and eq it has quite good response up to 400-450 hz, which is where i plan to cross over to the DCX.
I have to need to cross over at 100 hz since i have a 2 way bass solution, but sealed back modeling clearly reduces the low frequency extension.
I just added the thoath adapter to extend response in the higher range.
the 4th and 5th image are freq resp and displacement at 80V input for the single driver (800W).
Xmax is 6,8 mm.
I have no idea how to implement the new throath adapter in a real life desing; I tested a bunch of different drivers and i ended up choosing the one Robert simmed, mainly because i live in Italy and i'm already using B&C products, so it's easy to get them.
I'm looking forward to import the 3d model on Akabak as soon as i have time to sort some thing out with the software, and build a protopype as soon as i sell out my old midtops.
I'm actually quite new to modeling, but hope to get better results soon