Description
F.A.S.T. 5 Speaker sound enhancement kit
3-piece sound enhancement kit for 5.25" (130mm) speakers
Focus the sound from your speakers into your car rather than losing it behind the vehicle's door cards. Also helps to reduce the effects of back waves.
Fast Rings is a unique laser-cut foam solution for coupling aftermarket speakers to OEM apertures. ... The Fast Rings solution drives more output from your speakers into the passenger compartment improving frequency response, especially in the all-important mid-bass region.
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