It has an RCA input and can be run off of phantom power through the din cable or can be wired directly. The Subwoofer output has level and crossover frequency adjustments. Technical Information -Main Volume control effects all outputs -Subwoofer volume effects volume of sub out only. -For the Three EQ Controls, the outer knobs offer frequency adjustments and inner knobs offer +/- 12dB of boost/cut. -The gain controls on the top of the PSW adjust the input sensitivity. S' (Specifications Input Voltage Up to 3v RMS Output Voltage Up to 9V RMS Sub Woofer Crossover Frequencies 35Hz to 200Hz Sub Woofer Crossover Slope 12dB per Octave Low Frequency EQ Band 35Hz to 90Hz Mid Frequency EQ Band 100Hz to 500Hz High Frequency EQ Band 4.5kHz to 12.5kHz Boost/Cut on EQ Bands +/- 12dB Signal to Noise 98dB THD 0.03% Stereo separation 80dB Input Impedance 10Kohms Output Impedance 100ohms Dimensions 7" Wide V 1" High 4 3/4" Deep For questions on this or any other Orion Products, call Technical Support at 1-480-705-5600....