Help needed 40Hz to 450Hz

[3GGG]

I need help for a design for bass enclosure which give 40Hz (or lower) to 450 hz. The higher the effeciency the better. They are to go with a B&C dcm 50 in an Azura horn with fostex T500amk2 on top. Budget is not GOTO but $$$ is ok.

 

[Bill F.]

Hornresp is a great simulator. Here's a model I did for a ported horn that fits your bandwidth.

 

[Helmuth]

Is this what you are looking for?

That is hard to find look here.http://www.diyaudio.com/forums/multi-way/182233-back-loaded-horns-7.html

 

[3GGG]

Thanks Helmuth
Looks promising. Am i correct this is a 15" in a front loaded horn? I see a sketch of a horn a few times in the thread but I am unsure about further details.
If you care to could you post detaails of the driver and enclosure/horn used so i can learn more about the design you have simulated.
Regards

 

[Helmuth]

Thanks Helmuth
Looks promising. Am i correct this is a 15" in a front loaded horn? I see a sketch of a horn a few times in the thread but I am unsure about further details.
If you care to could you post detaails of the driver and enclosure/horn used so i can learn more about the design you have simulated.
Regards

Yes it is a front-loaded bas-mid horn Detail are to find in the last post including the txt file that you can import in hornresp and play with.

The drawing is a suggestion how to build the beyma simulation would fit in a cube of 60cm same as 2feet with a triangle sealed volume. Like the La scala horn.

You should design the horn your self with the data in the simulation. It is a conical horn so it is easy to calculate and make the flare.

 

[ScottG]

2 BD15's in parallel with an appropriate reflex tuning freq..

http://www.bd-design.nl/contents/en-us/d19.html

http://www.phys.tue.nl/EPG/veldhuizen/BD-15.pdf

 

[Bill F.]

Helmuth,

Isn't your sim in 0.5 pi space? Since your drawing does not appear to show a corner horn, better run it again in 1 pi space for a truer picture...

 

[3GGG]

Thanks ScottG, I had forgotten those drivers. Two 15 is still looking like a simple way to do the bottom end and may allow a bit more room for variation with regards to bass mid horn cross over position.

 

[tinitus]

Calculated to work perfectly with Eminence KappaPro-12 and DeltaPro-12, but not tested

 

[3GGG]

Any further specs to show me tinitus? Looks interesting

 

[tinitus]

Any further specs to show me tinitus? Looks interesting

hey, almost missed your post

specs ?

bottom bandpass uses Kappapro12
upper midbass uses Deltapro12

size is pretty much as you see it in drawing
imagine the size of a 12" woofer, and you get the picture
calculations were made from that, to make sure the chosen woofers fits the design
and they fit exstremely well, actually

I can recalculate if needed