Black Hole 5 is a complex multi-layer material system that
combines three key functions; damping, isolation, and
absorption. The overall thickness of Black Hole 5 is 1-3/8",
but. Optimized for use in speaker enclosures, as well as any
other acoustical dampening installations. All layers are
laminated together using a special thermal process, without
the use of adhesives or solvents.
Layer 1 - High
loss vibration damping material (same as the Black Hole
Pad), deadens resonance from the cabinet. It is very
strongly bonded to the wall with PSA film for optimum
performance. Layer 2 -
Polyester urethane flexible open cell foam � in. thick.
Thanks to its special vibration-isolation
characteristics, it de-couples the vibrating structure
(the cabinet wall) from the rest of the damping system,
thus optimizing its performance. Layer 3 - Barrier
septum 1/8 in. thick. Made of limp flexible vinyl
copolymer loaded with non-lead inorganic fillers, it
acts literally as a dead wall, thus isolating the
vibrations in the walls of your cabinet and the
vibrations created inside the enclosure from each other.
Layer 4 -
Polyester urethane foam 1 in. thick, structurally
optimized for acoustical dampening, (specific
permeability, density, stiffness, pore size and shape).
It is highly effective at "soaking-up" maximum sound
energy with minimum thickness. Layer 5 - Thin
diamond pattern embossing, densified with polyurethane
film surface. This unique surface layer improves
dramatically the performance of the whole acoustical
system, especially the lower mid-bass frequencies, (very
sensitive range where simple acoustical foam becomes