amgator

What I currently have:
MTX Thunderfoam enclosure (.94 cu ft)

What I want:
Alpine SWR-T12 (.6 cu ft)

Can I make it work?

Is there a material that I can put in the box to reduce the volume? Maybe expanding foam. I'd really like to make the box I have work.

Any suggestions are appreciated.

joefox

Use your box like it is.
The .6 ft3 spec is the minumum box size and it will give you the minimum performance. The sub works best is a 1-1.25 ft3 sealed or 1.25-1.75 ft3 vented box so the enclosure you have is close to the optimum enclosure size.

superccs

I also thought that boxes were suppose to be speaker-specific volumes, but a larger volume does seem like it should work...

DO you have it set up in that box right now and it sounds crappy?

mSaLL150

The thin Alpines are pretty enclosure specific and you should aim for that .6 cu ft of space. A larger box will reduce power handling and create a bloated bottom end while the recommended .6 enclosure will yield a flatter response and better extension.

amgator

I do not have the speaker yet. Doing my due diligence before ordering so that I know it will work.

Where do you find that a 1 cu. ft. box is optimum? I must have missed this looking at the specs.

Im assuming a larger box will not work because the larger volume will not provide the necessary air resistance against the backside of the cone. The larger the volume, the more air there is to move, and the looser the cone will be. This will affect the sound of the sub.

FirstFtruck

Don't think that is right, box volume is based on the area needed to react to the air compression caused by speaker (diaphram) movement. Too large a volume will not dampen the speaker correctly and could possibly damage the voice coil, too small a volume will restrict the speaker diaphram range and diminish the speakers ability to move free causing a diminished sound range.

You could simply open your box up either both ends or one end and cut some pieces of 3/4" plywood and screw and glue them in the correct locations to give you the recommended box volume.

The required volume (optimum box volume) is stated in the spec's for the speaker.

Mark

powerranger262

or there is a product out there, I think it's called poly fill. It's like cotton that you stuff in the box. I think Crutchfield sold it years ago.

Fast Filly

iTrader: (1)

Walmart sells bags of polyfill and works quit well

TimelessR1

Poly fill will make the box "seem " larger if you want to decrease volume size in a box...and wood....even a pice of 2X4 jsut measuer the 2x4 and figure out the volume you need to add...its simple...and when you get it right...screw and wood glue the 2x4 in.