I did some experimenting with this material. http://www.bondedlogic.com/documents/UltraTouch_broch.pdf in our cabinets. It's basically ground up blue jeans (really) made into insulation. I didn't find it very effective. First off, the dust was really an issue. This stuff constantly gave off lots of really fine dust. It's meant for walls and attics and not really designed for use in areas with a lot of air movement (like a bass cab). Secondly, I just didn't care for the sound of the cab with this installed inside. It smashes down quite a bit when you staple it in and I think it then becomes too dense and doesn't have enough air space between the fibers. The cab sounded overall brighter, with more upper mid presence, which didn't work for me well.
After trying many different materials, I have really been surprised by the difference the batting material makes in the tone of the cabinet, especially in the mids and upper mids. It seems that many of the DIY crowd here is goes through a lot of work to design cabinets and crossovers only to give very little thought to the cabinet dampening. There's a fair amount of variation that can be made to the cabinets tone by trying different materials, as well as varying the amount of material used (ie. leaving some surfaces bare). I think this an an area often overlooked and can make for some interesting experimentation.
After trying many different materials, I have really been surprised by the difference the batting material makes in the tone of the cabinet, especially in the mids and upper mids. It seems that many of the DIY crowd here is goes through a lot of work to design cabinets and crossovers only to give very little thought to the cabinet dampening. There's a fair amount of variation that can be made to the cabinets tone by trying different materials, as well as varying the amount of material used (ie. leaving some surfaces bare). I think this an an area often overlooked and can make for some interesting experimentation.
