JL Slot port design - Does size matter?

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   I been faf'n around with a 500/1 & JL 10W7 in what is meant to be a ported box made to jl spec but has been made in a wedge shape so not sure if it is or isn't jl spec
spose i can get the tape on it and work the volume out.
But that's not the question, i need to build a new cab to fit in the larger space i have
and working with a little program i've got the optimum size would be a 3.4 ft3 ported box
which seems to give a 3 db rise from 50 Hz down 6 db rise at 35 Hz!!!

The question is......is it worth making a box that large when i can make the jl
sloted port box at only 1.5 ft3? and do the above rise levels sound true?

Any body got any software to work that out?

cheers - Pete

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Discogimp Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 13 February 2006 Location: United Kingdom Status: Offline Points: 76	Post Options Post Reply Quote Discogimp Report Post Thanks(0) Quote Reply Topic: JL Slot port design - Does size matter? Posted: 04 November 2008 at 10:42pm
	I been faf'n around with a 500/1 & JL 10W7 in what is meant to be a ported box made to jl spec but has been made in a wedge shape so not sure if it is or isn't jl spec spose i can get the tape on it and work the volume out. But that's not the question, i need to build a new cab to fit in the larger space i have and working with a little program i've got the optimum size would be a 3.4 ft3 ported box which seems to give a 3 db rise from 50 Hz down 6 db rise at 35 Hz!!! The question is......is it worth making a box that large when i can make the jl sloted port box at only 1.5 ft3? and do the above rise levels sound true? Any body got any software to work that out? cheers - Pete
	Nuf-Func Disco Devices

imageoven Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 28 March 2007 Location: Scotland Status: Offline Points: 2199	Post Options Post Reply Quote imageoven Report Post Thanks(0) Quote Reply Posted: 05 November 2008 at 9:02am
	sounds to me like you need "winsid" - search for that and you should do ok.

LunchieTey Members Profile Send Private Message Find Members Posts Add to Buddy List Young Croc Joined: 06 February 2005 Location: Australia Status: Offline Points: 934	Post Options Post Reply Quote LunchieTey Report Post Thanks(0) Quote Reply Posted: 14 November 2008 at 8:23am
	That's a big box for a car audio 10", they are designed for small boxes(loose suspension) and may suffer if it's too big. Just plot a xmax plot on win isd to see if you're needing a subsonic filter. The rise is perfectly acceptable, its a sub driver, not a prosound driver! Don't forget the car will increase volume below around 70hz at 12db/oct too
	Speaker addict