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Closed-cell polyethylene enhances frequency response for improved sound clarity Easy conformability in tight spaces for a professional installation Thin material design offers less bulk for a clean and tight installation for professional finished appearance Reduces panel-to-frame and door panel reverberation and road noise for improved acoustics Acts as a protective guard for exposed speakers and extends their lifespan See more product detailsExtra Description
Boom Mat speaker baffles maximize speaker performance by isolating the correct frequency responses while damping reverberation in the sheet metal and panel to frame resonance. Also forms a water tight protective shell to prevent moisture intrusion. Closed cell polyethylene enhances frequency response for improved sound clarity Easy conformability in tight spaces for a professional installation Isolates frequency responses and prevents sound from migrating to unfavorable areas in the vehicle such as door panels.
So the idea behind these is too protect the back side of speakers from moisture but suffocating the speaker does not add performance in output. Car audio speaker are IB(infinite Baffle) designc which means they work well in large opens. Now you can put them in small enclosures but that can affect the tuning and frequency range. I tried them and ended up cutting the material away from the back side to let the speakers breath. Now there is a new product out called FAST RINGS that improves speaker performance and output by directing the sound waves and canceling out back wave without suffocating the drivers.