PreSonus Temblor T10 Powered Studio Subwoofer 10-inch glass-composite low-frequency transducer 250 watt, Class AB amplification;Power:100-120V ~50/60 Hz or 220-240V ~50/60 Hz Input gain control (-30 dB to +6 dB, continuously variable) and continuously variable low pass filter (50 Hz to 140 Hz) Switchable highpass filter removes frequency content below 80 Hz from the full-range signal sent to the main monitors Momentary footswitch (included) bypasses the subwoofer, highpass filter, and Sub Out Left and right, balanced XLR and  TRS and unbalanced RCA main inputs