[hearse]

ok well i decided to put my 2 more 15's in the back chamber of my huge ass box, and i'm cutting the front chamber and making it a couch. the 2 15's i have in the chamber now cause that chamber to flex. what are my options as for bracing? I seen some talk about using threaded rod but how does that help i don't fully get the concept.

 

[purplemonte]

from what i understand you just run the rod through the box, like in the left side and completely out the right side and use nuts to hold it tight, that way the walls cant flex apart

 

[ClassicGMJunkie]

use small sections of 2x4 or double up on your layers of panels. ... or at best, redo the install out of 1" thick birch, that shit WONT flex, plus its water/air tight. not cheap but best wood for building cabs out of. i've seen all sorts of tricks for deadening and SPL applications... red clay in A/B pillars, sprayfoam in doors/trunks/etc. even diamondplate and concrete filler strengthening boxes. even used 2x2 box steel to keep ceilings from flexing. if it moves, it absorbs sound pressure.

 

[Brahma Brian]

All thread is the best way...

You use nuts and washers on BOTH sides of the wood to "tie the box together" and to eliminate panel flex, normally between the front baffle and the rear of the box...

It works like a strut tower brace on a car, if you are familiar with that at all...

 

[hearse]

ok the rod thing makes sence now. how think should i go like the same thinkness as a bic pen work? and also should i use the widest washers i can find? and have no clue about the strut brace

 

[Brahma Brian]

Originally posted by hearseballa@Sep 10 2006, 09:41 PM~6144491
ok the rod thing makes sence now. how think should i go like the same thinkness as a bic pen work? and also should i use the widest washers i can find? and have no clue about the strut brace

I'd do 1/2 inch or larger, 3/4 is the common for large box surfaces...

Yes, large flat washers and lock washers should be used...

 

[hearse]

what about doin steel plates on each eachside to take up more area then a washer?

 

[ClassicGMJunkie]

steel plates with allthread at each corner would do pretty damn good. plus you could strengthen it more without stressing one small area out. also gives you a surface to make it airtight once more, like with BeatsTheNails or Liquid Nails for that matter. also, coat your cabinet with thompson's water seal to make sure moisture and air dont seep.

 

[hearse]

Originally posted by GrandPrixOnThree@Sep 10 2006, 10:20 PM~6144798
steel plates with allthread at each corner would do pretty damn good. plus you could strengthen it more without stressing one small area out. also gives you a surface to make it airtight once more, like with BeatsTheNails or Liquid Nails for that matter. also, coat your cabinet with thompson's water seal to make sure moisture and air dont seep.

it's ported :0

 

[ClassicGMJunkie]

well shit. scratch that LOL