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Old 04-18-2008, 11:52 PM   #1
00LGTP
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Member#: 172618
Join Date: Feb 2008
Chapter/Region: Tri-State
Vehicle:
1995 EJ253/D25 GC
371hp/355tq 1.5xtr 93oct

Default confused on MTX recommendations... help me pleased

so i emailed MTX for a sub box recommendation, as far as specs. they gave me a PDF file (idk how to include in post). anyway i dont understand the dimensions. i will post anything i dont understand in bold.

Enclosure Volume - 2.25 Ft^3...(<<< i assume 2.25 spare feet on the outside?)
Vent Dimensions - 4"x 11.75"...(make the vent 4 inches wide and 11.75 inches tall?)
F3 - 39hz... ???
Tuning Frequency - 36hz... (no clue on how to tune the sub, or is that how the frequency will be)
Ripple - 1.45dB...???
Net Volume - 2.08Ft^3... square feet on the inside?
Vent Volume - .09 Ft^3... (square feet on the inside of the vent?)

can you guys help me out? i will feel like a retard if i email them back with all my questions.
any information on this would be greatly appreciated,thanks
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Old 04-19-2008, 12:51 AM   #2
Rock-Star
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Member#: 173073
Join Date: Feb 2008
Chapter/Region: TXIC
Location: Cypress Tx.
Vehicle:
2003 350Z

Default

Quote:
Originally Posted by 00LGTP View Post
so i emailed MTX for a sub box recommendation, as far as specs. they gave me a PDF file (idk how to include in post). anyway i dont understand the dimensions. i will post anything i dont understand in bold.

Enclosure Volume - 2.25 Ft^3...(<<< i assume 2.25 spare feet on the outside?)
Vent Dimensions - 4"x 11.75"...(make the vent 4 inches wide and 11.75 inches tall?)
F3 - 39hz... ???
Tuning Frequency - 36hz... (no clue on how to tune the sub, or is that how the frequency will be)
Ripple - 1.45dB...???
Net Volume - 2.08Ft^3... square feet on the inside?
Vent Volume - .09 Ft^3... (square feet on the inside of the vent?)

can you guys help me out? i will feel like a retard if i email them back with all my questions.
any information on this would be greatly appreciated,thanks

2.25 ft. Internal volume.
Vent is 4" Diameter X 11.75" long (you may be missing a number here)
36hz is determined by the volume/vent and should be the tuning freq of the box they recomend. They should have included a diagram of the box showing what the dimensions are refering to. Hope this helps.
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Old 04-19-2008, 02:09 AM   #3
Audiosavvy
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Chapter/Region: SCIC
Location: Bakersfield, CA
Vehicle:
Qcab dakota 4x4
LT1 Formula Firebird

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Please take no offense, but if you don't know what you're doing, your ears will thank you for having it done professionally. It's not as simple as you may think, especially if you're using a slot-port.
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Old 04-19-2008, 09:59 AM   #4
00LGTP
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Join Date: Feb 2008
Chapter/Region: Tri-State
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1995 EJ253/D25 GC
371hp/355tq 1.5xtr 93oct

Default

Quote:
Originally Posted by Audiosavvy View Post
Please take no offense, but if you don't know what you're doing, your ears will thank you for having it done professionally. It's not as simple as you may think, especially if you're using a slot-port.
no offense taken. i am a noob in this car stereo stuff. i just have some MDF wood at my house (a big sheet) and i figured i would try to make a box for free first instead of going out and buying one for 80$ or w/e is it.

is the port going to be tubular? can i use 4" PVC pipe?

i copied word for word on the PDF file. so i know im not missing a number.
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Old 04-19-2008, 12:10 PM   #5
inkpreza
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Chapter/Region: AKIC
Location: Palmer,AK
Vehicle:
2001 Dodge Ram Sport
1973 MGB

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get a pro to build it, then try to build one on your own. it's better to have a good one and f*** up a practice box. when i first got into box building i used cheap plywood to practice building boxs'. putting the pieces together in the right order is important as your pieces should be cut to fit a certain way for solidity.
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Old 04-19-2008, 04:29 PM   #6
khail19
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Location: Reno, Nevada
Vehicle:
2007 Audi A3 VR6
Quattro

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Basically all you need to worry about is making a 2.25 cu ft box (total internal volume) with a round port 4" in diameter and 11.75" long. You can use PVC or ABS pipe or buy a pre-made round port. The rest of the information they gave you are just what the specs of the box will be if you build it properly.

Good luck, remember to measure twice, cut once.
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