Bass Reflex design using MJK software

teodorom · 23rd May 2004, 12:51 PM

Hi all,
when in a Bass Relex the vent is on the opposite side of the driver (so zdriver~zport), what are the correct settings for the appropriate MJK worksheet ?
The answer is the simplex one, or there are some complexities ?
Thanks

Timn8ter · 23rd May 2004, 01:31 PM

It's the simple answer, distance from the top. I've always wondered why someone would want to do that. AFAIK, the highest compression for loading the vent occurs near where two or three panels meet. It also seems the most likely occurance of upper frequencies exiting the vent would exist with the port directly behind the driver.

teodorom · 23rd May 2004, 05:16 PM

I'm tring to understand if I can do similar to the Coral RS3000 project.
That is a camber with the mids driver (Peerless HDS 134) on top, and a TL (Peerless HDS 182) on the base.
So I need some S0 for the TL (440 cm2 would be better, 405 cm2 -and a 152 cm line- still gives -with a 0.6 filling- acceptable results).
I would like to use the TL to get 20 more Hz and some sort of "baffle step compensation" (so the HDS 182 will go backward and will have an appropriate impendance in series).
I'm still simulating ...
Thanks

23rd May 2004, 12:51 PM	#1
teodorom diyAudio Member Join Date: Apr 2004 Location: Milano	Bass Reflex design using MJK software Hi all, when in a Bass Relex the vent is on the opposite side of the driver (so zdriver~zport), what are the correct settings for the appropriate MJK worksheet ? The answer is the simplex one, or there are some complexities ? Thanks __________________ Teodoro

23rd May 2004, 05:16 PM	#3
teodorom diyAudio Member Join Date: Apr 2004 Location: Milano	I'm trying to understand, but not only that ... I'm tring to understand if I can do similar to the Coral RS3000 project. That is a camber with the mids driver (Peerless HDS 134) on top, and a TL (Peerless HDS 182) on the base. So I need some S0 for the TL (440 cm2 would be better, 405 cm2 -and a 152 cm line- still gives -with a 0.6 filling- acceptable results). I would like to use the TL to get 20 more Hz and some sort of "baffle step compensation" (so the HDS 182 will go backward and will have an appropriate impendance in series). I'm still simulating ... Thanks __________________ Teodoro

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23rd May 2004, 01:31 PM	#2
Timn8ter diyAudio Member Join Date: Jul 2003 Location: Seattle, WA	It's the simple answer, distance from the top. I've always wondered why someone would want to do that. AFAIK, the highest compression for loading the vent occurs near where two or three panels meet. It also seems the most likely occurance of upper frequencies exiting the vent would exist with the port directly behind the driver.

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