Maximum Common Mode Range: ±15 V DC, clamped to earth for voltage transient protection
Connectors: Female XLR input with male XLR loop output
Input Impedance: 10 kΩ differential between pins 2 and 3
Wiring
Pin 1: Chassis/earth through 220 kΩ, 1000 pF, 15 V clamp network to provide virtual ground lift at audio frequencies
Pin 2: Signal +
Pin 3: Signal - (optional polarity reversal switch)
Case: Earth ground and chassis
DC Blocking: Differential DC blocking up to maximum common mode voltage
CMRR: >50 dB, typically 80 dB (50–500 Hz)
RF Filter: Common mode: 425 kHz; Differential mode: 142 kHz
TIM Filter: <80 kHz, integral to signal processing
Nominal Input Sensitivity: 0 dBV (1 V rms, 1.4 V peak) continuous average is typically the onset of limiting for noise and music
Input Level: Audio source must be capable of producing +20 dBV (10 V rms, 14 V peak) into 600Ω to produce maximum peak SPL over the operating bandwidth of the loudspeaker