check over my box ..please

[mtx11 10+ year member]

i think i got my final designs . help me pick its for 3 12" Rockford Fosgate he2's powered by a mtx81000d in a 95 jeep grand cherokee

either this one

Net Volume: 5 cubic feet

Tuning Frequency: 32 Hz

Port Width: 2.25 inches

Port Area: 39.375 Square Inches

Port Length: 15.5 inches

 

External Dimensions: 42 wide x 19 tall x 15 deep.

or this one

Net Volume: 4 cubic feet

Tuning Frequency: 35 Hz

Port Width: 2.25 inches

Port Area: 39.375 Square Inches

Port Length: 16.5 inches

 

External Dimensions: 42 wide x 19 tall x 12.5 deep

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[Moe Lester 10+ year member]

more port..

 

[PowerNaudio 10+ year member]

you should ether increase the diameter of the port or increase the quantity of ports.

if you want to stick to using a single port use this calculator to determine what diameter to use to keep your port from making noise.

link

or use this calculator to find out if your port will make noise.

link

last link