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If this is in fact a ''HOLE''.............it may be NXT's suggestion to TDK to squeeze some more high frequencies from the exciter's voice coil?
What about the panel thickenss? Does it have any change in bass or fullness?I gave a couple to my friend but he didnt have any of the gator board, he used a section of 1-1/2" thick foam and he said it sounded good but i dont have any to try.I want to build a panel the size of a bookshelf with about the same fullness but lower profile. For rear surrounds, or even a center. I built a center but its a tad to thin sounding for what i like.
I thought i had gator board but i guess its not, i guess i just have black foam core poster board. The black stuff i have is different then the white but its not near as rigid as what i read the gator board is.I like the foamcore stuff it just needs to be bigger.
Quote from: BowerR64 on 13 Nov 2009, 03:38 amI thought i had gator board but i guess its not, i guess i just have black foam core poster board. The black stuff i have is different then the white but its not near as rigid as what i read the gator board is.I like the foamcore stuff it just needs to be bigger.[/b]I'm thinking of getting a 48X96 inch piece of foam core and having it cut in half lengthwise then cut to 72 inches for both pieces.I'll put 8 exciters on each panel, but before any I make big panels I'm trying the aluminum on the front.This will require that the hole for the exciter is slightly larger than the diameter of the exciter. The next problem is having the end of the exciter be exactly at the proper distance to touch the aluminum sheet.The sheet of the aluminum would need to be just thick enough not to bend or sag, then well glued to the panel as to allow a low loss acoustical coupling.Joining two different materials in this manner, may just give us us the best of both worlds. Decent bass and just a slight boost to the high end, would be a good step towards a panel with acceptable characteristics.Jack