question about isobarik sub

kendt · 18th January 2007, 01:13 PM

I am of the understanding that if an isobarik arangement is used the enclosure can be half it's normal size. Does this apply to the port also or does it stay the same??

bobo1on1 · 18th January 2007, 01:39 PM

If you are talking about bassreflex, the port needs to be made alot longer to achieve the same frequency response.

SY · 18th January 2007, 01:58 PM

Just assume fs and Qts stay the same, Vas is halved, and the only volume that counts is the volume behind the rear driver. Then it's straightforward to enter these values into a Thiele-Small program and see what the volume and port need to be.

18th January 2007, 01:13 PM	#1
kendt diyAudio Member Join Date: Dec 2006	question about isobarik sub I am of the understanding that if an isobarik arangement is used the enclosure can be half it's normal size. Does this apply to the port also or does it stay the same??

18th January 2007, 01:58 PM	#3
SY diyAudio Moderator Join Date: Oct 2002 Location: Austin, TX Blog Entries: 1	Just assume fs and Qts stay the same, Vas is halved, and the only volume that counts is the volume behind the rear driver. Then it's straightforward to enter these values into a Thiele-Small program and see what the volume and port need to be. __________________ “Listening to records is like ****ing a picture of Brigitte Bardot.” - Sergiu Celibidache

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18th January 2007, 01:39 PM	#2
bobo1on1 diyAudio Member Join Date: Dec 2003 Location: Tulips, windmills and wooden shoes.	If you are talking about bassreflex, the port needs to be made alot longer to achieve the same frequency response.

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