Empirical Labs ELDS Derresser Vertical Front Panel, Module for API-500 System, Freq. Response is 3 Hz to 120 kHz (-3dB points), Dynamic Range - 115 dB from maximum output (.5%THD soft clipping) to minimum output. Transformerless noise floor typically – 93dBu, Distortion Ranges between .0035% and .01% depending on mode and settings, DC coupled Input and Outputs, High quality audio caps used internally, Input Balanced, Output single ended but with balanced impedance, Pin 2 hot, Input Impedance is 20k Ohms. Output impedance is less than 51 ohms, D-S Dynamics Time Constants - Attack time is less than 1mS. Release .04 sec, fixed internally, Power Consumption – 8 Watts max. 4 Watts Typical