I made the box for my sub on the large side on purpose if I ever decide to go ported. I need to reduce the volume by about 1 cf. I have a bunch of books in there right now but the way I have the bracing set-up I really need to custom fit something. I know most people just use 2x4s cut and glued/screwed but I'm curious if there's anything lighter I could use. With the box + sub + amp this thing already weighs around 100 lbs.
Some people have mentioned foam sheet insulation but I question whether this is dense enough. Is there anything any of you have used/would recommend that would effectively reduce volume while being lighter than wood?
Are you talking about the sheets? Something like this: http://www.lowes.com/pd_15358-1278-3/4X48X96+R-TECH_4294858106__?productId=50100630&Ns=p_product_qty_sales_dollar|1&pl=1¤tURL=%3FNs%3Dp_product_qty_sales_dollar%7C1&facetInfo=
I should notice no difference using this as opposed to wood, right?
The sub I'm using calls for a 2.4 cf box with a qts of .7. It also has an FS of 15 hz so there is bottom end for days. Like I said I added a bunch of books to reduce volume by .6 - .7 cf and it made a pretty huge difference.
I'm also using the top end of the sub's power handling and I was hitting max extension way too easy at low frequencies when I first tested it out with an effective box volume of around 4 cf.