Inverting box space question...

[Pistonsfan70 10+ year member]

I am getting a d9 this week and i have a 1 cu ft sealed fiberglass box for my sub. I plan on either getting my box modified with mdf rings to give me more depth or just inverting it for now until I get more $. I know that inverting a sub makes the box bigger. The recommended box space is between .6-1.2 but I'd like to keep it around .9

How do I go about making the box smaller, anything specific I put in? What is a good amount to put in (of said object) to lower it by .2 ft?

Thanks!

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[PowerNaudio 10+ year member]

you can use mdf wood to take up the space, you can glue together about 5 pieces of .75" x 10" x 10" board then screw them to the back of the box. that should bring the volume down .22 cu ft.

 

[Beat_Dominator 5,000+ posts]

Use anything that'as dense and won't cause any weird resonance....... MDF is the best rout.

 

[Pistonsfan70 10+ year member]

Where is the best place to buy MDF?? Sorry, I'm a complete newb

 

[PowerNaudio 10+ year member]

home depot or lowes

 

[JimJ 5,000+ posts]

Lowe's or Home Depot sell it by the 4'x8' sheet. $19.99 a sheet, the last time I looked.

A local lumberyard would also sell it.

 

[PowerNaudio 10+ year member]

well they also have the 2' x 4' at .5", 3/8", .75" for like $5