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    LPF Help - can't turn off amp or headunit LPF

    Hey guys, I have a JVC KD-R730BT head unit and a Hifonics BRZ1200.1D. I have my head unit LPF settings (55,85,120) with no off setting, and my amp's LPF settings (I believe 50-210) with no off setting. Anyway, I want the sub to roll off around 80-100Hz, but I have a filter coming from both...