Sound Storm EVOBASS Car Bass Generator &ndash; Powerful Low Frequency Enhancement System for Bass Applications Remote Subsonic Filter and Bass Level Control Recessed Control Knobs, Parametric Bass Control Subsonic Filter Balanced Inputs PWM (Pulse Width Modulated) Power Supply Pre-amp Output: 10 V Dimensions: 4-5 / 8" (L) x 7" (W) x 1-5 / 8" (H) 1 Year Warranty