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

[kpozr2 10+ year member]

yes its sanded, now to change the tuning, how?? make it longer? shorter?

 

[Chevyaudio 5,000+ posts]

Ygpm...and its lenghten the port.

 

[kpozr2 10+ year member]

how much....?

 

[slc72005 10+ year member]

how much....?

if you make it longer you will lose box size.

just cut out another piece of wood for the inside of the port so that the port walls are 1.5 inches as opposed to 3/4 inch thick this will lower the freq and not lose box size.

this will lower the port freq, just do some more calculations on how many of the walls you shoulod add double walls to to get the desired freq

 

[kpozr2 10+ year member]

will this work?? i can add to the walls everywhere=???

 

[kpozr2 10+ year member]

okay so the ports are going to be 1.5" wide now later 2nite. that should drop it to 35 hz and not so **** high!!!

 

[DBfan187 5,000+ posts]

When the port is in the middle like that and it "splits" to each side, does port displacement change or is it still the same?

Port Displacement
if it uses of the sides of the box for one side of its port wall, then:

(port height) x (port length-wood thickness) x (port width + wood thickness) / 1728

if the ports in the middle of the box, and has its own walls, then:

(port height) x (port length - wood thickness) x [port width + 2(wood thickness)] / 1728

 

[o. l. t. 10+ year member]

You've got good box building skills dude. I started building boxes in high school (class of 95 //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif) and made a killing. So much that I opened three car audio stores! (lost them in 9/11 though //content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif ) I'm too old to sit out and build boxes anymore or I'd still be doing it. Life slowed down and I got intolerant of summer heat around 30 //content.invisioncic.com/y282845/emoticons/cool.gif.3bcaf8f141236c00f8044d07150e34f7.gif .

I don't mind it every now and then, but I was knocking two per day out way back when. You are doing a killer job on the boxes, it looks great. Just need to learn thiele small parameters and you'll be set. You've definitely got the eye for it.

http://www.thielesmall.com/

Keep up the good work.

 

[kpozr2 10+ year member]

yeah i dont relaly want to waste this box, id love to have him have it, arent higher tuned boxes good for spl comps or some rock music???

 

[Chevyaudio 5,000+ posts]

48Hz...will sound horrible on music.

 

[kpozr2 10+ year member]

heres my idea. Rip the top off. replace the internals, make new top and re carpet.

 

[lilmaniac2 5,000+ posts]

before doing that cant you test it out...

 

[Moe Lester 10+ year member]

Honestly, it would be easier and faster to build an entirely new enclosure than rip the carpeting off and break it apart and rebuild it. Also, the original plan is 2.9 cubes TOTAL, not per driver.

 

[xluben 10+ year member]

i ran some numbers and came up with this:

that's about 4 cu ft tuned to just under 34 Hz with 62.5 sq in of port, and i think it'll fit fine in an S10 and stay under the window line.

with that much more volume (nearly double) and 10+ Hz lower tuning, you'll get a LOT more low bass extension. while you're at it you might as well make another box for yourself too //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

i can't wait to get my box!!!!!! it's going to be loud!!!!!

you should just drive all night and meet me tomorrow at 5AM in minneapolis //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[kpozr2 10+ year member]

i dont have the time or wood or carpet. im just refunding his money, keepin my enclosure, becuase i like how it sounds personally, and burning the mess up.game over.