Adjustable bass enhancement preamp output Bass remote input Preamp full range output Adjustable bass level output Adjustable bass width and sweep adjustments Output level control with clip indicators Input level control with clip indicators Selectable input level range RCA or speaker level Selectable turn on trigger remote wire input, DC sense and signal sense Low level inputs RCA level High level input speaker level Power connector with two remote output trigger wires Dual concentric bass knob A. bass level, B. output level Size: 109W x 134L x 30.5H Fuse value: 1A mini ATC Voltage range: 9.5V -15V Bass remote type: HF-U-02 Fixed voltage output full range: 4V Adjustible subwoofer output voltage: 0V -9V Maximally Flat Frequency Response Main: -3dB 10Hz to>50kHz Input Impedance Low level inputs: 20k Ohms Input Impedance High level inputs: 20k Ohms Maximum high level Input Voltage on any input before clipping:>48V Maximum Output voltage at 1.0% THD N subwoofer output: 9.0V Signal to Noise Ratio ref to 2Vrms out, unity gain: -84.0dBA EQ boost: Variable to 8.1dB Unit turn on options: 30mV High Level Audio, 59mV RCA Audio, 2.2V DC Offset Current Draw: 0.32A Turn on Delay Time: 0.1 seconds Setup test tone track: 100 Hz 1000Hz