Wayne Parham Messages: 18786 Registered: January 2001
Illuminati (33rd Degree)
Thomas is referring to a "partitioning layer" of insulation, spanning the cross-section. This is the way the tower two π cabinet is made and I suppose any large cabinet could benefit. The idea is that long waves pass right through it so bass is unaffected but midrange is trapped by it and attenuated. Insulation lining the walls helps absorb sound too, but spacing the insulation away from the cabinet sides helps its effectiveness at lower frequencies, down into the lower midrange.
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