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Hi has anyone out there ever experimented with cement lining the inside of speaker cabs. I have KEF 104ab and some old KEF Cadenza which uses the same driver array. I bought these for spares for 104s. The Cadenza cabs are very scruffy so i dont mind trashing them. I thought of cutting the front baffle off, layering the inside walls with about an inch of cement. Rounding off the corners internally to cut standing waves. Then fitting a new baffle with 25mm MDF. Any ideas on the subjct would be welcome.
Follow Ups:
Wet concrete is bad for wood boxes, especially kakaboards.Easier and dry; ceramic tile backer board; Wonderboard or Durock.
1/2'X3'X5'. $10. Cement. Depot, tile companies.Cuts a little hard but use the right tool, even a sheeetrock knife, and practice a bit. Bond with resilient caulk; PL Premium urethane, etc. leave a space to decouple.
a speaker from the late 80's that was shaped like a 4 foot periscope and made out of concrete? As I recall it was a 6" two-way and vented at the base in the rear. I had a set on loan for a few weeks and recall them sounding very good.Instead of concrete lining the cabinet, I think you may achieve even better results using blackhole 5 . It's costly but is worth the expense. A thicker baffle will help too.
It's a lot easier and probably more effective to apply something like North Creek's "Glop" to the sides of the enclosure. Glop is a mixture of clean sand and Aileen's Glue (stays somewhat flexible) which can be found at craft stores like Michael's.
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