Kicker CXA400.1 46CXA4001 400 Watt Class D Monoblock Car Amplifier

The quality of the bass tone matters as much as the volume, so a variable low-pass filter helps get maximum performance from your sub/enclosure combination, while a fixed subsonic filter removes the extreme low resonances that cause distortion. A variable bass boost allows you to add some extra low-end punch if you want.

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