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Help needed with enclosure plans


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#1 sweety4x4

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Posted 28 Apr 2018 - 15:53

I'm planing on building a new box & was hoping someone could check over my plans to see if I have calculated it correctly. It's going to be a wedge shape so it fits up against the back seat so I get as much room in the trunk as possible the aim is for 1.9ft^3 & tuned to 35Hz
Width 35"
Height 15"
Top panel 8" depth
Base Panel 11.5" depth
Port internal size (made from 3/4" MDF) 4" x 4" & 15" long
Sub being used is an old JBL GT3 12" getting powered from a 220wRMS JBL amp

#2 frostbite

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Posted 05 May 2018 - 21:16

Is 1.9cuft correct?

 

Back in the day when I ran gt4's the biggest spec ported box was 2.25cuft @30hz, that was with a round 13"x4" port including woofer displacement.

man that thing was loud, I used to have the rear wiper bouncing off the glass on the astra, good times


Edited by frostbite, 06 May 2018 - 00:23.

Roanapur is an old Thai port in southern Thailand, where the deserters of the Vietnam war took refuge and were joined by the worst villains and criminals of the world.

Prostitutes, drug-addicts, mercenaries, killers and psychopaths of any nationalities compose the population of Roanapur.

 

 


#3 Ryan.

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Posted 07 May 2018 - 18:47

As above. As you are using a low powered amp (those subs can take 400+) you want a bit bigger box so the sub can be more efficent on lower power.

 

I'd suggest 2.5cft personally


2008 Street A: 145.8.................................................................2013: Street B: 149.1  - Uk Champion
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#4 frostbite

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Posted 15 May 2018 - 17:41

+1

 

I ran mine on about 400w from a crappy legacy amp, it had a 1600w pmpo lol and I think that is what sold it for me when I was naive


Roanapur is an old Thai port in southern Thailand, where the deserters of the Vietnam war took refuge and were joined by the worst villains and criminals of the world.

Prostitutes, drug-addicts, mercenaries, killers and psychopaths of any nationalities compose the population of Roanapur.