Help needed 40Hz to 450Hz

3GGG · 6th February 2011, 10:47 AM

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. · 6th February 2011, 01:07 PM

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

Helmuth · 6th February 2011, 01:38 PM

Is this what you are looking for?

That is hard to find look here.Back Loaded Horns

3GGG · 6th February 2011, 08:55 PM

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 · 09:36 PM

Quote:

Originally Posted by 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

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 · 6th February 2011, 10:44 PM

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. · 6th February 2011, 11:35 PM

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 · 7th February 2011, 12:56 AM

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 · 7th February 2011, 12:59 AM

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

3GGG · 7th February 2011, 01:09 AM

Any further specs to show me tinitus? Looks interesting

6th February 2011, 10:47 AM	#1
3GGG diyAudio Member Join Date: Mar 2010	Help needed 40Hz to 450Hz 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.

6th February 2011, 01:38 PM	#3
Helmuth diyAudio Member Join Date: Oct 2008 Location: Winterswijk	Is this what you are looking for? That is hard to find look here.Back Loaded Horns __________________ ( (( KUGELWELLE )) ) recent projects :OB-mk1 /fatboy / monitor-xl / Horn-AM / dappolito / td124-mk1-rb301 / Hybrid-pse / Vfet

6th February 2011, 10:44 PM	#6
ScottG diyAudio Member Join Date: Feb 2003 Location: US	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 __________________ perspective is everything

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6th February 2011, 01:07 PM	#2
Bill F. diyAudio Member Join Date: Nov 2001 Location: SW MI	Hornresp is a great simulator. Here's a model I did for a ported horn that fits your bandwidth.

6th February 2011, 08:55 PM	#4
3GGG diyAudio Member Join Date: Mar 2010	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

6th February 2011, 11:35 PM	#7
Bill F. diyAudio Member Join Date: Nov 2001 Location: SW MI	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...

7th February 2011, 12:56 AM	#8
3GGG diyAudio Member Join Date: Mar 2010	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.

7th February 2011, 01:09 AM	#10
3GGG diyAudio Member Join Date: Mar 2010	Any further specs to show me tinitus? Looks interesting

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