Mid-bass horn (easy to build)

[JoshK]

Thanks for the further details guy!

 

[doug20]

This is exactly what I have been looking for...awesome work Carpenter!!!

Is it possible to take your 80Hz horn design increase its size vertically and put 2 15" JBL2226Js (stacked) in it ??

 

[Sheldon]

Interesting build. I'm planning on building my unity horn system into corner soffits. Was going to go with sealed for the 15" midbass, but this thread has me thinking. I don't want to extend out too far from the corner. If the bass horn is mounted in a corner soffit, how much shorter can I make it and still get reasonable extension to mate with subs? It it promising enough to learn the modeling program, and can I incorporate the corner loading into the program?

Sheldon

 

[JoshK]

Have you had a chance to measure your horn to compare to the predicted plot?

 

[revintage]

Is it possible to take your 80Hz horn design increase its size vertically and put 2 15" JBL2226Js (stacked) in it ??

Unfortunately the 2226 is not suitable for horns. If you anyway insist using them, use only one in each horn. But all virtues of Carpenters horn will anyway be lost. To check, take a few hours to learn Hornresp.

 

[JoshK]

Unfortunately the 2240 is obsolete although they pop up on epay. Carpenters mentioned the 18PS76 but I notice its T/S aren't really that close. I haven't put the numbers into Hornresp to see how it'd differ.

 

[revintage]

Why not use the easy-to-build concept with a 15" instead. The dimensions will work well with asuitable driver as At is only 523cm2.

 

[revintage]

This is a sim of the 80Hz adapted to EVM-15L.

 

[doug20]

Unfortunately the 2226 is not suitable for horns. If you anyway insist using them, use only one in each horn. But all virtues of Carpenters horn will anyway be lost. To check, take a few hours to learn Hornresp.

Are you saying the 2226s are not suitable at all for any horn design?

I tried Hornresp for a small amount of time. Im better off hoping someone else will have a design for me.

 

[revintage]

Sorry for the OT!
Did a quickie on the 2226 as Hypex basshorn. A 35Hz/T=0,6 looks good. Can give it a little more time. If mono is acceptable one could also run them as a pair and give you a shorter horn. Doug, please start another thread if you want to continue.

 

[Norris Wilson]

A dual JBL 2226J loaded midbass horns sounds like it could be a high quality design. I am in the same camp with Doug20, very interested.

 

[carpenter]

For the 80hz horn, I simmed a pair of the 2226 16ohm versions in Hornsresp and the results are similar to the 2240. The gentleman happened to have four 2226J units at his disposal, so it seems a natural to use them in this fashion.

 

[carpenter]

This is a sim of the 80Hz adapted to EVM-15L.

Yes, I happen to own a pair of those drivers, have the same sim results, and will build a pair for my neighbor as a show of gratitude for allowing me to use his shop.

 

[carpenter]

Have you had a chance to measure your horn to compare to the predicted plot?

I've only measured it by "ear" and can attest to Hornresp's accuracy. It's a mean little critter and can easily outperform any other component in my system.

 

[carpenter]

Are you saying the 2226s are not suitable at all for any horn design?

I tried Hornresp for a small amount of time. Im better off hoping someone else will have a design for me.

In my 80hz design, the sim looked favorable to me.

 

[carpenter]

Interesting build. I'm planning on building my unity horn system into corner soffits. Was going to go with sealed for the 15" midbass, but this thread has me thinking. I don't want to extend out too far from the corner. If the bass horn is mounted in a corner soffit, how much shorter can I make it and still get reasonable extension to mate with subs? It it promising enough to learn the modeling program, and can I incorporate the corner loading into the program?

Sheldon

The modeling program tends to bring out the "anal response", so beware.

 

[carpenter]

Unfortunately the 2240 is obsolete although they pop up on epay. Carpenters mentioned the 18PS76 but I notice its T/S aren't really that close. I haven't put the numbers into Hornresp to see how it'd differ.

The B&C 18PS76 is very affordable, that's why I bring it up, and it has favorable qualities. It's not as wide ranged as the JBL 2240, but is readily available.

 

[carpenter]

Sorry for the OT!
Did a quickie on the 2226 as Hypex basshorn. A 35Hz/T=0,6 looks good. Can give it a little more time. If mono is acceptable one could also run them as a pair and give you a shorter horn. Doug, please start another thread if you want to continue.

May we see the input parameters and the impulse response?

 

[revintage]

Earlier said the 2226 wasn´t suitable for midbass work. After simming the 35Hz I gave them a new try. Doesn´t work as a single but with two. Still can not recommend it. This as part of the sound of the original 18" will be the important factor of singlepoint direct-radiation.

John,
This is the script of the 35Hz. Place it in Hornresp/Import and open it. I do not use Hornresp for designing the horns. Instead I use my own Hypop spreadsheet for proper anulling. As Hornresp, the spreadsheet is based solely on Marshall Leach AES-paper. Using it gives you full control of all parameters.

 

[doug20]

Sorry for the OT!
Did a quickie on the 2226 as Hypex basshorn. A 35Hz/T=0,6 looks good. Can give it a little more time. If mono is acceptable one could also run them as a pair and give you a shorter horn. Doug, please start another thread if you want to continue.

Thanks,
I will start a new thread.