Guy,
I used 3M Super 77 spray adhesive to stick the insulation and carpet on my speaker box. When that stuff dries, watch out. If you get it on your hands, watch out. Just be careful with this stuff, its sticky
http://solutions.3m.com/wps/portal/3M/en_US/Manufacturing/Industry/Product-Catalog/Online-Catalog/?PC_7_0_4UVL_command=CustomizePageHandler&PC_7_0_4UVL_theme=en_us_manufacturingindustry_portal&PC_7_0_4UVL_output=html&PC_7_0_4UVL_vroot=81LC4NNTD4ge&PC_7_0_4UVL_gvel=SC2785KN7Pgl&PC_7_0_4UVL_node=5DLCFLVQ0Pbe&PC_7_0_4UVL_root=GST1T4S9TCgv
High tack, high coverage and fast drying for permanently attaching foils, carpeting, lightweight foams, paper, cardboard, felt and, cloth to painted or unpainted metals, wood and hardboard.