MY DIY Sub, I'm actually taking the plunge

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gbyleveldt

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Hi Guys,

I've been toying with a couple of figures for those JBL GT4 subs that I got on the cheap. Anyway, I've run some plots in BassBox and was wondering what you guys think (Please don't laugh!!) (Oh ja, I still need to figure out how Sound Easy works, but it's not so 'Easy'  :? )

The specs for the sub are here
http://europe.jbl.com/car/products/...ser=GTS&language=ENG&country=ZA&region=EUROPE

Anyway, from what I can see in the specs of these units, the prefer a closed box (according to Bassbox), so for interest sakes I have run a sim with both the suggested closed and vented sizes.

Closed box is around 29 litres (black line) and Vented box is around 64 litres (red line) and the port is tuned to about 30Hz. Just for shits and giggles I closed the port (green line) just to see what happens.

You guys care to comment? I'm not too sure what I'm seeing here.[/url]
 
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