No, relatively few OBs made from recycled table tops, doors or open back boxes and excepting the latest Paraflex 'craze' that I would never have considered worth doing before DSP, have over time either designed, 'oversaw', built, at least a copy or 'proof of concept' alignment of every 'flavor' of box alignment I've ever seen posted on DIY audio forums thanks to having easy access to folks with the necessary math skills, higher education to turn my intuitive thoughts WRT the 'physics of the situation' into meeting the needs of the intended app.
One tip on measuring a horn. Take your measurements at least 4 or 5 metres away. It takes time for the output to sum. You literally can calculate the length required. Rule of thumb for most speakers if you don't want to do the math is 10 metres. You need enough volume to not have your measurement swamped by environmental noise. That is the only potential problem. Many enclosures are not so happy with this.
There we go - the build didn't match the sim 🙂
If you want some of that lost SPL back, try stuffing the closed end of the horn that's behind the driver. That should reduce the impact of the reflection from the closed end of the horn on the overall output.
That was suggested to him in the post #34 with an image.
"One simple test that may worth doing is to stuffing the Front Horn Throat like indicated in the black area of the attachment #3 with some fiber material, things that could damper the frequencies close to the dip, and see if you perceive any improvement."
It's easy to implement.
Hi @laxandredeyed
Did you ever get these equipped with the getshow plate amps? Your builds look great, especially the cabs for your friend's DJ setup you posted over on the other manifold thread. 🙂
I'm really impressed Lordsansui's design tools and this manifold design in particular, especially since it looks like something even I could possibly knock out with a track saw without the expensive CNC requirement. I'm a very crap woodworker. lol
Did you ever get these equipped with the getshow plate amps? Your builds look great, especially the cabs for your friend's DJ setup you posted over on the other manifold thread. 🙂
I'm really impressed Lordsansui's design tools and this manifold design in particular, especially since it looks like something even I could possibly knock out with a track saw without the expensive CNC requirement. I'm a very crap woodworker. lol
@rrobot I never actually built the second box. I had plans to build new ones with a lower frequency response and less sensitivity, but they never eventuated.
I’ve equipped a few other boxes with the Getshow amps. I did have two amps that failed, but Getshow gave me free replacement parts.
My DJ friend’s boxes are still going strong.
I’ve equipped a few other boxes with the Getshow amps. I did have two amps that failed, but Getshow gave me free replacement parts.
My DJ friend’s boxes are still going strong.
I'd love to see the box for 2226, even if you don't have measurements just yet the plans would be of interest to me - would you be willing to share them?