8' composite low-frequency driver Bluetooth 5.0 wireless audio stereo input 50W RMS, Class AB power amplifier 30 Hz to 200 Hz frequency response 100 dB SPL (Peak, @ 1 meter) Input gain control (-30 dB to +6 dB, continuously variable) Continuously variable lowpass filter (50 Hz to 130 Hz) Defeatable highpass filter removes frequency content below 80 Hz from the full-range signal sent from the Eris Sub 8BT outputs to the main speakers Left and right, balanced 1/4' TRS and unbalanced RCA main inputs Left and right, balanced 1/4' TRS and unbalanced RCA pass-through outputs for connecting satellite speakers Polarity invert switch Protection: RF interference, output-current limiting, over-temperature, turn-on/off transient, subsonic filter Power Saver mode (engages after 40 minutes)