Clear-Com SB-704 - Manual (Page 35)

S B - 7 0 4 M A I N S T A T I O N 4 - 1
TECHNICAL
SPECIFICATIONS
SB-704 MAIN STATION
dBu is an absolute measurement. 0 dBu is referenced to 0.775 volts RMS
Panel Microphone Input
Input Type Electret
Input Impedance >=2K Ω
Mic Limiter Threshold 0dBu ±3dB
Mic Limiter Range >= 15dB
Headset Microphone Input
Input Type Dynamic
Input Impedance >= 1K Ω
Mic Limiter Threshold 0dBu ± 3dB
Mic Limiter Range >= 15dB
Program Line Input
Maximum Level before Clipping >= 20dBu
Input Impedance >= 5K Ω
Headset Output
Load Impedance >= 8 Ω
Output Impedance <= 25 Ω
Output Limiter Threshold +5dBu ± 3dB
Maximum Output Level before Distortion >= 17dBu
Speaker Output
Load Impedance >= 4 Ω
Max Output Level before 1% Distortion 20dBu ± 2dBu
Party Line Output
Off Noise < -74dBu
Output Impedance >10K Ω
Party Line Input
Crosstalk < -60dB
Max level before Clipping >= 12dBu
Sidetone Null Capability > 25dB
Stage Announce/Balanced Line Out
Type Balanced