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need help tuning my box... cant get it right


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i have a box made for my full size blazer with 4 pa mojo 15s 38wx32dx20h and i want to tune it to 35hz. can someone please help me figure out what size my port should be?

i'm new to the spl world and loving it!!!
4- power acoustik mofo 152s
rd d9

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I think you're at about bare minimum there. That's just under 3 cubes a piece. The woofers displacment along with the port would shrink that right down.

EDIT: Do you have enough room to make the port external?

Edited by loudNlow87

'11 Jeep Patriot New Build

Head Unit: Pioneer AVH-P3200DVD

Front: Massive CK69 Components

Front Amp: Massive NX2

Rears: Infinity Kappa's

Subs: 8 Sundown SA-8 v2's

Sub Amp: AB 450.1

XS D3100

Come on 150!

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Is this just a sealed box or is it already ported?

'11 Jeep Patriot New Build

Head Unit: Pioneer AVH-P3200DVD

Front: Massive CK69 Components

Front Amp: Massive NX2

Rears: Infinity Kappa's

Subs: 8 Sundown SA-8 v2's

Sub Amp: AB 450.1

XS D3100

Come on 150!

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Don't put 4 15's in that box unless the port can be external. . .

You need at least 150 sqin of port, and really more like 200 sqin.

Put 3 in there for now with 150 sqin of port.

Current system:

1997 Blazer - (4) Customer Fi NEO subs with (8) American Bass Elite 2800.1s

Previous systems:

2000 Suburban - (4) BTL 15's and (4) IA 40.1's = 157.7 dB at 37 Hz.

1992 Astro Van - (6) BTL 15's and (6) IA 40.1's = 159.7 dB at 43 Hz.

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already ported out the back from side to side 6 inches tall. im pulling the port and putting on a new back plate to make it sealed and going from there

i'm new to the spl world and loving it!!!
4- power acoustik mofo 152s
rd d9

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You could put three 8" external aero's out the back each at 17" long. Still barely squeezing by on volume, but.. If you want four, go for it. I honestly don't think it'll really be that bad. Invert the woofers even. Get as much space as you possibly can. :P

'11 Jeep Patriot New Build

Head Unit: Pioneer AVH-P3200DVD

Front: Massive CK69 Components

Front Amp: Massive NX2

Rears: Infinity Kappa's

Subs: 8 Sundown SA-8 v2's

Sub Amp: AB 450.1

XS D3100

Come on 150!

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i'll try and invert my subs and what if i did a port out the center in the back, top to bottom how big would that have to be? are the aeros the round ports?

Edited by bad_ass_car

i'm new to the spl world and loving it!!!
4- power acoustik mofo 152s
rd d9

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