Front loaded midbass horn for 18sounds 15mb700 ?

[matsj]

Have someone simulated a front loaded midbass horn for 18sounds 15mb700 ? I'm having a small idea to use 2 per side in 70 - 500 hz area. I'm not good at hornresp so i try this instead.

Mats

 

[matsj]

I'll try Hornresp today and see how it goes.

Mats

 

[JLH]

What frequency range do you want to cover? How big a horn can you tolerate? Let's start there first.

 

[matsj]

JLH: around 70-500hz. I prefer "small" but ? I´m going to use 2 tapped 25hz horn under as subs and a 2" driver with Autotech horn above. I´ll use double 15" in front and center in my new "Cinema" .

mats

 

[JLH]

The minimum length for a 70Hz horn is about 125cm, with 170cm being more ideal. If you want a straight horn, then you will have to add to these lengths the back chamber. Either way you are looking at something around 2 meters deep. Is this too long for your application? If this is too long than you will have to fold the horn. The mouth will be about 4805cm ^2. To prevent mouth resonate problems you would want to make the mouth 54.5cm X 88cm.

 

[tinitus]

I found that 120-150hz is a sensible size for a midbass horn, or ..?

question is, will the horn cut off frequncy also be the -6db xo point ?

the one I built for a 12" have relatively small apperiodic back chamber
its not very big, but still plays more bass than expected

 

[matsj]

I want something like Edgar s in size. 2 meters are too long. I'll try to sit down with hornresp tomorrow. Can i go down in size with the back chamber ?

Mats