jbell's set of four tapped horns

[mastadon]

please excuse me, but ive never seen anyhting like that before. that speaker in the exhaust port??? doesnt the sound beat on it? the size seems, detrimental. Does the internal design really kik that much ***? i got 4 jbl 2225hs and am looking for something to do with them, just about the same specs as those eminence. i was thinking of a dual cab, speakers on horizontal plane side by side, pointed down with a scoop turning, the sound exit port forward out the bottom. 22inches tall x 39"wide. not sure of depth yet. any suggestions?? please step up lol thanx

Originally Posted by davygrvy

Here's some more photos. I was going to wait for Jim, but think I'll jump the gun


original test cab. He says he burned it, but didn't roast any weenies.


That shows the fold he used.


Here's a setup where Jim was wondering about phase steering patterns

[jbell]

yea, my cab's were for permanent install... that's why so big. However, they can vibrate the aluminum stands on the other side of the football field....

The link I sent you in your thread for screamerusa's cabs are MUCH easier on the back to move -- build them.

[layertone]

Those 4 look impressive!

This was entered in on CAD... looks like for a CNC machining application, it will take 3 sheets. Any thoughts?

[littlemike]

Jim's is a nice, simple build, and it works great if you do not have to move it. Seriously, these things are BIG. Almost LABsub big. If you're plaining to move them at all, you can get very similar performance out of a smaller cabinet.

Screamer's design is probably the best proven DIY Tapped Horn designed for PA out there now. I ran a quick sim that I posted in another thread about the 3015. It simulates within a few dB of Jim's horns, plays a little lower, takes the same power, and is about 1/2 the size (approx. 12 cubic feet).

I have not built this yet - just pushing pixels. As I do not have the drivers or the need at the moment, I posted it for others to play with.

3015lf?

[panjilaras]

hi littlemike
which thread discussing about screamers th for PA?

anyone build don snyder's 30 hz th using definimax/beyma yet? i'm curious to compare it to jbell's.

[littlemike]

It is all detailed here.

[Don Snyder]

Hi Panjilaras,

My 30 Hz horn caught on in Germany, where the Beyma's are more reasonable. The Eminence driver works fine for Home Theater, but is too xmax limited for PA.

If you need ScreamersUSA's or Jim Bell's power, don't make my 30 Hz TH.

[salzburgsoundsystem]

Hi guys,

I am very seriously considering building a set of these cabs, the design for which JBELL has so generously shared. I mostly used to spend my time on another forum - but I kinda like it here, I may stick around - I do of course have some preconceived notions and related questions.

Is slot loading relevant or even useful for tapped horns?

Would the bracing added to a 1/2 inch version still give me a lighter box than the barely braced 3/4 inch thick cabinet?

Mouth guard:
I am thinking about making a frame, placing 2 layers of steel reinforcing mat, with speaker grille foam sandwiched in between. Not sure what kind of catch or hinge system to use, but we'll get there.

Thank you all!

Ben

[jbell]

Hello ben, I think I know which forum you speak of.....

Only build my big box if you are going for install. Build scott's box if you need to transport. Scott has it figured out, right down to the bracing, and even to the point that if you use a solid rear brace, it hurts performance. LIVE SOUND Specific Tapped Horn thread... There is blood sweat and tears in that design, and it works.

The great thing is.... drum roll please... 40hz is not -13db down from 100hz, it's pretty much flat. Steep high pass at 40hz, or don't build -- the high pass is not an option.

http://www.screamersusa.com/furybox.html

[salzburgsoundsystem]

Originally Posted by jbell

Hello ben, I think I know which forum you speak of.....

Only build my big box if you are going for install. Build scott's box if you need to transport. Scott has it figured out, right down to the bracing, and even to the point that if you use a solid rear brace, it hurts performance. LIVE SOUND Specific Tapped Horn thread... There is blood sweat and tears in that design, and it works.

The great thing is.... drum roll please... 40hz is not -13db down from 100hz, it's pretty much flat. Steep high pass at 40hz, or don't build -- the high pass is not an option.

furybox

Thank you Jbell! I have been eagerly reading that thread. Scott seems to have put in one hell of a lot of work!

Stcott's plans look good to me, the bottom left image confuses me a little though! Has he lopped the corners off, or do the dogears (sorry to use the term, not sure what to call them!) actually indicate where triangles/wedges are attached to narrow that side of the chamber?

Your design appealed to me because my dad has retired and I'm busy at my day job, so to speak. He offered to build some cabinets for me. And I thought your design had a wonderful simplicity to it, which would make life easier for a newbie builder, especially thanks to the fairly straightforward angles...

If I understand correctly, Screamer's design provides similar response and maximum output. In exchange for a degree of build complexity his is a smaller package.

Thanks for helping me out!

Ben