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View Full Version : what is this box tuned to



Chris Bell
07-16-2011, 02:22 AM
built a new box and just kinda wondering what the tuning is only built a couple vented boxes and and dont really know how to figure it out if anyone can help i would greatly apperciate it... the internal dem. are 32l*20d*16t port is 3.5*16t*29l

Kangaroux
07-16-2011, 02:42 AM
Are those internal dimensions the chamber or including the port? If it's the chamber then you should up your port area. Rule of thumb is 12-16 square inches of port area for every cubic foot.

Chris Bell
07-16-2011, 02:44 AM
And if anybody is wondering how big a box you can fit in an 01 maxima thats it. had to pull the carpet and spare tire cover and give it alittle kick to get it in lol shouldve went .5 shorter hope i dont ever have to take it out

Chris Bell
07-16-2011, 02:46 AM
that is the internal of the whole box. built alot of sealed boxes in the past kinda new to the slot port

Kangaroux
07-16-2011, 02:49 AM
that is the internal of the whole box. built alot of sealed boxes in the past kinda new to the slot port

You're looking at somewhere between 29-31Hz. Personally I would have bumped up the port area a little bit, too little port area and you introduce port noise from high air velocity. But, you just about meet the 12 square inches per cube so I guess you'll be fine.

Chris Bell
07-16-2011, 02:54 AM
thanks alot man it sounds good and hits hard. if i make the port longer do you think it will sound better have to do it in the car since i dont know if i can get the box back out. was kinda hopeing to be around 33-34hz range got close for a guess

Kangaroux
07-16-2011, 03:02 AM
thanks alot man it sounds good and hits hard. if i make the port longer do you think it will sound better have to do it in the car since i dont know if i can get the box back out. was kinda hopeing to be around 33-34hz range got close for a guess

Alright then you can do this. Make your port 4" wide, that will help with your port area, but shrink down your length to 25 inches and it will make your tuning 33hz just about on the dot.

FYI you can use this site for calculating tuning: Car Audio - PORT Size Calculations and Formulas for WOOFER and Subwoofer BOXES (http://www.carstereo.com/help/Articles.cfm?id=31)

Use the calculator on the bottom. Select the port shape to "square" but keep slot port at "no" (it messes up the numbers sometimes...). For the box volume you enter in the chamber (not including port)

Chris Bell
07-16-2011, 03:12 AM
thats the problem i cant make the port wider without taking it outta the car and dont know if i can get it back out lol thanks for the calculator ive tried to use a couple others but this computer at work wont let me and its the only way i have internet other than my phone but that one works

Kangaroux
07-16-2011, 03:16 AM
thats the problem i cant make the port wider without taking it outta the car and dont know if i can get it back out lol thanks for the calculator ive tried to use a couple others but this computer at work wont let me and its the only way i have internet other than my phone but that one works

huh? what do you mean lol

Chris Bell
07-16-2011, 03:22 AM
to change the port from 3.5 to 4 inches wide i would have to take the box outta my car because there not enough room to do it inside it and dont know if the box will ever come out in one piece it was rather hard to get in lol (second post describes what it took to get in but doesnt say how much of a pain it was literally threw my back out getting it in there