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View Full Version : is 2.25 to much for a baffle?



myvanpounds
06-08-2006, 07:42 AM
sup guys I've been stubbing my toe on my 18XXX laying in the floor for about 8 months now and I'm sick of it. so I need to build a box. The box needs to be BIG. biggest I've built yet. well I know that a single baffle is going to flex way too much and since I have to build in my truck I was thinking about using a triple baffle with double sides. besides the obvious weight increase is there anything wrong with this

ramos
06-08-2006, 08:22 AM
Nope, as long as you have the room go for it :)

iamamp3pimp
06-08-2006, 08:50 AM
my front wall is 2.25

doing this means that you dont have to brace as muh, but should still use some threaded rod or some standard bracing

myvanpounds
06-08-2006, 08:55 AM
my front wall is 2.25

doing this means that you dont have to brace as muh, but should still use some threaded rod or some standard bracing

I'm gonna have to ad sme 45's here and there but I only wanted to do it at the halfways (if ya'll know what I mean) I wanted the bok to be mainly 1.5 with a 2.25 baffle since its going to be 8.5 cu ft

ramos
06-08-2006, 09:05 AM
You actually will reap more benefit from proper bracing as opposed to doubling up the wall thickness. :)

myvanpounds
06-08-2006, 09:21 AM
You actually will reap more benefit from proper bracing as opposed to doubling up the wall thickness. :)

so what about doubling up AND proper pracing. (srry im knda dbunk rigt now) /I figured iF I doubpes up on the mdf ANFD braced with some 45s I'd be coo

ramos
06-08-2006, 09:23 AM
Not saying it's a bad thing. Just saying bracing will give you more benefit to fight flex than doubling up the walls. You can do both if you like. Just remember and 8.5 cuft doubled up enclosure, Is gonna be heavy as all fooking hell :)

myvanpounds
06-08-2006, 09:29 AM
Not saying it's a bad thing. Just saying bracing will give you more benefit to fight flex than doubling up the walls. You can do both if you like. Just remember and 8.5 cuft doubled up enclosure, Is gonna be heavy as all fooking hell :)

I drive a big *** f150 supercab. weight is no issue.

PatFitz9
06-08-2006, 10:18 AM
since you said you are building it in the cab, you would save space with proper bracing also. threaded rod or some cross pieces of wood should do ya fine. i had mine braced internally and a double baffle in front and that was good for me. and it's always easier to work with lighter pieces of wood.

myvanpounds
06-08-2006, 05:40 PM
how bout a couple 2x4's for bracing :) I havn't even designed the box yet. hell I still need to buy a router and tablesaw. (I will NOT build another box with a circle saw)

ssj2xxgotenxx
06-08-2006, 08:10 PM
I'm gonna have to ad sme 45's here and there but I only wanted to do it at the halfways (if ya'll know what I mean) I wanted the bok to be mainly 1.5 with a 2.25 baffle since its going to be 8.5 cu ft

There was a thread debating the impact of corner bracing (45 degree triangles) and whether they improve structural integrity. We concluded that they don't serve much purpose as bracing, but they do help out in the port turbulence department.

prochobo
06-08-2006, 08:40 PM
Use threaded rod instead of 2x4's. For 8.5 cu. ft., it's fine to do a triple baffle, but I'd also throw some rod in there. Although I have a 5.5 cu ft box, no internal bracing, but it has a double baffle and it's fine.

BassAce
06-08-2006, 10:08 PM
This may be a little crazy, but instead of using 3 layers of mdf. Would it be "better" so to speak to use a concrete/cement baffle. What weighs more 2.75" mdf, 1.50" hdf, 2.75" concrete, or 1.50" concrete baffle. Just for future reference for me.

InhumanAcura
06-08-2006, 10:41 PM
i went with 2.25" for my wall with 3/4" all-thread..worked well.

ramos
06-09-2006, 07:56 AM
There was a thread debating the impact of corner bracing (45 degree triangles) and whether they improve structural integrity. We concluded that they don't serve much purpose as bracing, but they do help out in the port turbulence department.
I don't use the 45's in the corner as bracing. More for structural integrity. The more surface area for the glue to hold onto the stronger the connection between the two panels :)

myvanpounds
06-09-2006, 09:40 AM
i'm talking 45's like this:
http://img153.imageshack.us/img153/2918/450wv.jpg

ngsm13
06-09-2006, 09:43 AM
I just put an 18 back in yesterday... in my OLD *** box...

Bad idea, single baffle FTL. It looks like the front face IS part of the subwoofer... fluctiating as much as it... :(. This was the same box the 18XXX broke 5screws in half in...

So I recommend bracing ;)

nG

ramos
06-09-2006, 09:46 AM
i'm talking 45's like this:
http://img153.imageshack.us/img153/2918/450wv.jpg


That way will work too. If your gonna make them large, you might want to cut some holes out of the middle to try and regain some of the volume your gonna lose :)

myvanpounds
06-09-2006, 09:55 AM
I just put an 18 back in yesterday... in my OLD *** box...

Bad idea, single baffle FTL. It looks like the front face IS part of the subwoofer... fluctiating as much as it... :(. This was the same box the 18XXX broke 5screws in half in...

So I recommend bracing ;)

nG

thanks noah.

looks like 1.5 all around with a 2.25 front it is with treaded rod hitting two axis and lotsa 45's (I'm building bigger than I need and bracing it back down to 8.5)

ramos
06-09-2006, 10:01 AM
(I'm building bigger than I need and bracing it back down to 8.5)


Very good idea. Lot easier to add chit in to take up room. Than vice versa :)

myvanpounds
06-09-2006, 10:13 AM
Very good idea. Lot easier to add chit in to take up room. Than vice versa :)

ya I got tons of room behind the front seats with the back seat out

iamamp3pimp
06-09-2006, 12:59 PM
me too