Presonus Eris Sub8, Active Studio Subwoofer, 8"" Woofer, Class AB power amplifier: 100 W peak (50 W RMS), Input level infinitely adjustable (no fixed increments or steps) : -30 dB to +6 dB, Variable low-pass filter: 50 Hz to 130 Hz, Switchable high-pass filter at 80 Hz, Phase switch, Inputs: 2x 6.3 mm balanced TRS jacks, 2x unbalanced RCAs, Outputs: 2x 6.3 mm balanced TRS jack, 2x unbalanced RCAs, Dimensions (W x D x H): 330 x 317 x 250 mm, Weight: 6.8 kg