Need help walling 2 18s in a truck

[kr15 5,000+ posts]

I just noticed that its 25 gross, not net. Ya a 4th would cut it close. You could absolutely do like a 1:1 or small ratio, which will sound great, but wont be as loud as a flat wall

 

[majorpker984]

Yeah i probably wont mess with a 4th now that i think about it. I was thinking about dojng a shell of 2x4s with expansion foam behind that and then doing a doubke layer of mdf for the walls and doing 3-4 baffles plus a faceplate. Is that gonna cut too much of my depth? I only have like 22-24 inches of depth from the seat to the back of the cab to play with

 

[Jeffdachef 5,000+ posts]

Yeah i probably wont mess with a 4th now that i think about it. I was thinking about dojng a shell of 2x4s with expansion foam behind that and then doing a doubke layer of mdf for the walls and doing 3-4 baffles plus a faceplate. Is that gonna cut too much of my depth? I only have like 22-24 inches of depth from the seat to the back of the cab to play with

seriously wood not do mdf for your wall. 11 layered sanded ply is a much lighter and stronger choice of wood.

 

[majorpker984]

seriously wood not do mdf for your wall. 11 layered sanded ply is a much lighter and stronger choice of wood.

11 layer sanded ply? Is that like birch?

 

[Jeffdachef 5,000+ posts]

11 layer sanded ply? Is that like birch?

the so called 60 dollar a sheet birch from home depot, yeah thats just sanded pine with a birch thin layer of veneer but double the cost.

11 layered sanded pine is 30 dollars a sheet without the stupid veneer. super strong super light.

 

[adulbrich 5,000+ posts]

Yeah i probably wont mess with a 4th now that i think about it. I was thinking about dojng a shell of 2x4s with expansion foam behind that and then doing a doubke layer of mdf for the walls and doing 3-4 baffles plus a faceplate. Is that gonna cut too much of my depth? I only have like 22-24 inches of depth from the seat to the back of the cab to play with

Like Jeff said, plywood is better.

I don't go to home depot though. I get the real birch, not pine with a layer of veneer.

 

[majorpker984]

Like Jeff said, plywood is better.
I don't go to home depot though. I get the real birch, not pine with a layer of veneer.

Is it going to make a huge difference going with pine rather than birch?

 

[kr15 5,000+ posts]

Cost savings? Ya, its gonna add up if your wall ends up taking 5 or 6 sheets.

 

[shredder1 10+ year member]

What IS the approximate weight savings over MDF?.. I think 3/4" MDF is almost 100 lb a sheet, what does a sheet of 3/4" birch weigh approximately?.. if I ever change up and go bigger I would like most of the extra weight in the subs... LOL!

 

[adulbrich 5,000+ posts]

Is it going to make a huge difference going with pine rather than birch?

No clue. I don't use pine

What IS the approximate weight savings over MDF?.. I think 3/4" MDF is almost 100 lb a sheet, what does a sheet of 3/4" birch weigh approximately?.. if I ever change up and go bigger I would like most of the extra weight in the subs... LOL!

Nowhere near 100 pounds, lol

 

[Popwarhomie 5,000+ posts]

I had 23 cubes net for my 2 18" 4th order. Don't think you will have enough.

MDF is 96 pounds a sheet.

 

[shredder1 10+ year member]

I had 23 cubes net for my 2 18" 4th order. Don't think you will have enough.
MDF is 96 pounds a sheet.

OK... then how much does 3/4 birch plywood weigh?... I know it's less... but not how much... just curious...

 

[Popwarhomie 5,000+ posts]

OK... then how much does 3/4 birch plywood weigh?... I know it's less... but not how much... just curious...

"Birch" or real Birch. Home depot and lowes birch is Pine with a stupid thin birch veneer. Butttt. 68 pounds.

 

[shredder1 10+ year member]

"Birch" or real Birch. Home depot and lowes birch is Pine with a stupid thin birch veneer. Butttt. 68 pounds.

Is REAL birch even lighter?.. does it cost more?

 

[Popwarhomie 5,000+ posts]

Is REAL birch even lighter?.. does it cost more?

Real baltic birch is 48 pounds but comes in 5x5 sheets.