Box Build for (2) 10" L7's (2.9 @ 38 each) for ARMY-KILLA!

[kpozr2 10+ year member]

how long would just 4"x12" port have to be for 33hz?36hz? also where do you measure the length from! im still unaware of that.

 

[squeak12 10+ year member]

cut my front baffle so there is 4.75" of empty space left, then make it 28.5" long?

What? You need to completely build a new box. I dont know what you have done and what you havent. I dont mean to sound rude, but if Im telling you exactly what to do, why dont I just build it and get the money. I said I would make you a plan not tell you how to build it with your current pieces.

 

[kpozr2 10+ year member]

all i need to know is how long a 4x12" port would have to be to get to 33 or 36hz. thats all. i can do the rest, im still a NEWB, i amlooking for help.

 

[kpozr2 10+ year member]

this is what i have to work with

INTERNAL DIMENSIONS

WIDTH- 38 3/4"

DEPTH- 15"

HEIGHT- 12"heres what it looks like in my garage

 

[Decipha 10+ year member]

http://www.carstereo.com/help2/Articles.cfm?id=31

here ya go

if you need any tips on box designing just LMK shoot me a PM and i'd be more than happy to answer any questions you may have

also I have ALOT (tons) of people on here that can vouch for my designs

 

[squeak12 10+ year member]

If you only have 12 high, its impossible to have a 12 tall port from where you told me you wanted the port earlier.

 

[kpozr2 10+ year member]

the internal height is 12" the total height with the top and bottom on is 13.5 external. a 12" high piece of mdf fits in.

 

[kpozr2 10+ year member]

heres exactly what i put in the calculator

PORT TYPE- SQUARE

QUANTITY OF PORTS-1

ENCLOSURE VOLUME-4.202

DESIRED TUNING FREQ-36hz

SQUARE VENT:

HEIGHT-12"

WIDTH-4"

VENT LENGTH=18.04"

 

[kpozr2 10+ year member]

also whats the difference between a slot port? what kind was on it origionall? sorry for all the questions but im trying to make this right.

 

[kpozr2 10+ year member]

anyone. looking to tune it to 36hz....

 

[Moe Lester 10+ year member]

ok this is what i came up with VERY quickly:

3.12 cu ft @ 35 Hz, 50 sq in of port area

i'm not 100% sure on all those cut measurements, but the port is 4" wide and then bends both ways and is 2" on each side. the total port length should be 30" to get a tuning of 35Hz.

you should just to a side port like all of moe's plans. it's just so much quicker to run the numbers and bass isn't about symmetry //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

dont build it without a divider... bad bad bad

 

[kpozr2 10+ year member]

how about this?????

3.36 Cu. Ft. @ 36 Hz

48 sq. in. port @ 24" L

this better? re-carpet in 1 hr. need nap

 

[xluben 10+ year member]

i come out with a little bit less volume and a little bit higher tuning, but my calculations could be a little off.

it's definitely bigger than 3.0 cu ft (after all displacements i got 3.1 cu ft) and definitely tuned lower than 40Hz (i got ~38Hz with winisd).

it should sound a lot better than the old box, late night tip will be way deeper. i can't wait to hear it tomorrow //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[xluben 10+ year member]

I just ran Kicker's recommended numbers //content.invisioncic.com/y282845/emoticons/scared.gif.f134e57c6c93ccd0f15aa5ac32c7d4a0.gif

Minimum Volume:

1.25 cu ft, 2.5" x 11.25" x 19.75" port tuning is > 49Hz!!!!

SPL/Deep Bass:

2.25 cu ft, 3" x 11.25" x 18" port tuning >38Hz

and those numbers where from that online port calculator, WinISD gives even higher tuning numbers!

I guess your other box was to Kicker's specs! //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

I'm sure you new box will be much better.

 

[vetkilr 10+ year member]

looks good now .........you never glued it?