PreSonus Eris Pro Sub 10 Studio Subwoofer

10-inch, front-firing, glass-composite, low-frequency transducer, Front-firing, bass-reflex acoustic port, Continuously variable lowpass filter (50 Hz to 130 Hz) sets the upper frequency reproduced by the subwoofer, Switchable highpass filter removes frequency content below 80 Hz from the full-range subwoofer outputs to the main monitors, Momentary footswitch (included) bypasses the subwoofer, highpass filter, and Sub Out, Input gain control (-30 dB to +6 dB, continuously variable), polarity invert switch, and ground-lift switch, 170 watt (RMS), Class AB amplification for up to 113 dB SPL, with a frequency response of 20 to 200 Hz, Left and right, balanced XLR and ¼-inch TRS and unbalanced RCA main inputs, Left and right balanced XLR and ¼-inch TRS outputs and XLR subwoofer output for connecting a second Eris® Pro Sub 10