my sealed box is too big

A friend made me a nice enclosure for my subwoofer yesterday. Unfortunately it is about 1.25ft^3 too big
Can I use that expanding yellow foam you get at the hardware store to fill up extra volume?
Or would it be better to place a bunch of 2x4's in it?
Or another idea if anyone has one. Thanks.
Can I use that expanding yellow foam you get at the hardware store to fill up extra volume?
Or would it be better to place a bunch of 2x4's in it?
Or another idea if anyone has one. Thanks.
KEF Q50 mains, M&K center, Boston Acoustics surround, Marantz SR6007 pre, Emotiva UPA-700, Pioneer DV-46AV, Samsung BD-j7500, Sunfire HRS12 subwoofer
Post edited by whgarrett1394 on
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cnh
Polk Lsi-7s, Def Tech 8" sub, HK 3490, HK HD 990 (CDP/DAC), AKG Q701s
[sig. changed on a monthly basis as I rotate in and out of my stash]
Something like Black Hole? Take a look at their site
http://www.blackhole-america.com/five.html
There are some others as well. Do a search for the SDAs Larry, Toolfan66, modded!
cnh
Polk Lsi-7s, Def Tech 8" sub, HK 3490, HK HD 990 (CDP/DAC), AKG Q701s
[sig. changed on a monthly basis as I rotate in and out of my stash]
You can use the foam sheets that Constantine suggested too but...gonna be hard to get the in the speaker hole.
I'd just use chunks of wood or MDF either glue or screwed or screwed and glued in to place.
As far as stuff acting like polyfil, polyfil doesn't really take up space. It just slows down air flow like a fat lady stopping just inside the doors at WAL*MART. That's why it makes the box seem bigger than it is. The foam Constantine suggested is close cell foam and therefore, solid but lightweight. It'll work just fine. The hard part is securing it. Hence the reason I prefer MDF or just wood.
is large enough to mount both amplifiers and crossover to it.
be some kind of gasket between the enclosure and the basket. I can hear air leaking.
I also don't know what to do about the wood. Paint or carpet. Both just sound like more work then I care to do. May just keep it natural. Fuction before fashion for now.
I bought the crossover today. Audiocontrol 2xs. It is fixed for 90hz @ 18db/octave. I will see how that sounds.
I can get different modules from Audiocontrol if it is too low.
Gotta figure out how to upload picks so I can show off my first stereo system.
Stuffing a box with polyfill or acoustic foam will actually lower the Qtc even more, so that might not be a good idea.
The driver I am using is an MbQuart pwd304. The box was originally 3ft^3. It's probably around 1.25ft^3 now.
I was worried that with all that volume I might easily over extend the driver, so I decided to fill the extra space.