PSB-200 Subwoofer Amplifier with Crossover / Phase Control - 200W – Soundavo
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DISCONTINUED - Power Acoustik C-1B Active 12dB Electronic Subwoofer Crossover Network with High or Low Level Input
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PRV Audio 1DF180B Subwoofer Crossover 180Hz 4 or 8-Ohms 600W RMS / 1,200 Program