Phase Control The phase control feature allows you to adjust the speakers phase to ensure all audio signals are playing together rather than against each other. When bass notes are noticeably absent, a quick and easy adjustment to the phase control could provide the perfect remedy. Subsonic Filter A subsonic filter is designed for use on subwoofers. Since not all subwoofers can reproduce the same low frequencies, the subsonic filter can be set for optimum bass response in order to keep the driver playing efficiently. Subwoofer Level Control The ability to boost or attenuate the sub level on the radio when an amp and subwoofer are connected to the subwoofer pre-amp output. Variable Bass Boost Variable Bass Boost allows you to adjust the low bass within the boost range to just the way you like it. Variable Low Pass Filter Variable low-pass filter gives you control over the frequencies that pass through to the subwoofer. Variable High Pass Filter Variable high-pass filter gives you control over the frequencies that pass through to the full range speakers.
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