Kicker Comp 12"

mike49504 · 4th June 2011, 06:15 PM

Im building a box for a friend of mine For 2 of theese.

Kicker Comp 12" single 4 ohm coil..

I didnt check the website so i called kicker on theese subs.

They told me to build the box 2.1 cubic ft per sub.

They also told me to use a 30 square inch port 20 1/2" long..

Well the website says 3 cubic ft per sub ported but i already cut the wood and started putting a 4.2 cubic ft box together (2.1 per sub)

A 30" square port 20 1/2" long per woofer seems like to big of a port in my eyes maybe im wrong..

Wondering if anyone knows a good size port to use for theese subs??

I plan on making slot ports but wondering if the size they gave me is good to use or anyone have a better size port to use?

Any help would greatly be appericated

Perry Babin · 4th June 2011, 08:59 PM

You should have asked kicker if the 2.1ft^3 was including or excluding the volume of the port. From some rough calculations, it looks like it's going to be tuned to about 44Hz which is a bit high for a daily driver. This is subtracting the 0.356ft^3 of the port from the 2.1ft^3 but it disregards the wall thickness of the port.

mike49504 · 5th June 2011, 02:45 AM

Kicker said the 2.1 cubic ft already includes the displacment for the sub and the port.

My friend bought 5/8" MDF I told him to buy 3/4 but he said to use the 5/8"

4th June 2011, 06:15 PM	#1
mike49504 diyAudio Member Join Date: Sep 2006	Kicker Comp 12" Im building a box for a friend of mine For 2 of theese. Kicker Comp 12" single 4 ohm coil.. I didnt check the website so i called kicker on theese subs. They told me to build the box 2.1 cubic ft per sub. They also told me to use a 30 square inch port 20 1/2" long.. Well the website says 3 cubic ft per sub ported but i already cut the wood and started putting a 4.2 cubic ft box together (2.1 per sub) A 30" square port 20 1/2" long per woofer seems like to big of a port in my eyes maybe im wrong.. Wondering if anyone knows a good size port to use for theese subs?? I plan on making slot ports but wondering if the size they gave me is good to use or anyone have a better size port to use? Any help would greatly be appericated

4th June 2011, 08:59 PM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	You should have asked kicker if the 2.1ft^3 was including or excluding the volume of the port. From some rough calculations, it looks like it's going to be tuned to about 44Hz which is a bit high for a daily driver. This is subtracting the 0.356ft^3 of the port from the 2.1ft^3 but it disregards the wall thickness of the port. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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5th June 2011, 02:45 AM	#3
mike49504 diyAudio Member Join Date: Sep 2006	Kicker said the 2.1 cubic ft already includes the displacment for the sub and the port. My friend bought 5/8" MDF I told him to buy 3/4 but he said to use the 5/8"

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