Cadence Acoustics LLC1 High Voltage Line Level Converter with Music Sense Amplifier Auto Start Input Impedance: 100 ohms|Output Impedance: 1 kOhms Variable Input Level: Infinity - 4 Volts RMS THD&N: 0.001%|Separation: &gt;85dB Frequency Response: 10Hz - 50 kHz Music Trip Sensitivity: 80mV|Turn-Off Delay: 1 Minute +/- 10 seconds Cadence LLC1 high voltage line level converter with music sense amplifier auto start