Help with MDF...

[mr.ikon 10+ year member]

This is going to be my attempt in building my first box. This will be made for a '91 MR2 which is very limited on room. Since I'll be using one Sundown E8 and bridging a PDX 150.4 and setting the gain fairly low, can I get away with using 1/2" or should use 3/4" MDF? Thanks.

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[grimreper912003 5,000+ posts]

Rashad uses .5 for his 18's with bracing so you might be able to get away with it. Sealed or ported?

 

[azimuth 5,000+ posts]

This is going to be my attempt in building my first box. This will be made for a '91 MR2 which is very limited on room. Since I'll be using one Sundown E8 and bridging a PDX 150.4 and setting the gain fairly low, can I get away with using 1/2" or should use 3/4" MDF? Thanks.

you can use 1/2 inch on a smaller box. just use a little bracing and spray the inside with undercoating or similar.

 

[DBBOOM 10+ year member]

Thickness used depends on the unbraced spans. There is a major difference in the strength of .5 and .75 though. Why bother with the .5?

 

[mr.ikon 10+ year member]

Rashad uses .5 for his 18's with bracing so you might be able to get away with it. Sealed or ported?

I think I'll go sealed on this. I'd really like to go ported, but i'm very limited on space.

Thickness used depends on the unbraced spans. There is a major difference in the strength of .5 and .75 though. Why bother with the .5?

Dimensions of the compartment behind my seat is roughly 16x8x8. So space is a factor for me. Is it possible that roughly 200 watts is overkill for 1/2"?

 

[IDSkoT 5,000+ posts]

I think I'll go sealed on this. I'd really like to go ported, but i'm very limited on space.

If you go sealed, you can use a round port (Aeroport. You can buy them on PartsExpress.com or use PVC piping) to save space. But, I have a triple chambered box, .75 on the sub chambers and some empty space inbetween. It's made out of 1/2 and it's solid as hell. Though, I do want to make a new box with 3/4 with a new design.

If you're afraid of flex, you can use dowels and glue them inside.