Clear-Com HLI-FBS - Manual (Page 152)

14 Specifications
14.1 Main Station (HMS-4X)
14.1.1 Connectors
Specification Description / value
Intercom Powerline Outputs Four 3-pin XLR. Two male and two female.
Headset 4-pin XLR–M
USB USB Type A and Micro-AB
Program 3-pin XLR–F
SA (Stage Announce) 3-pin XLR–M
Hot Mic / IFB Interface 1/4 in. (0.64 cm) phone jack
GPIO 25 way D-type female
Table 14-1: Main Station: Connectors
14.1.2 Microphone pre-amplifier
Specification Description / value
Headset Mic impedance: 200
Ω (Dynamic)
Headset Mic Voltage 1.7V (Electret selectable)
Limiter +23dB
The following specified for a route to 4-wire output @ 0dBu out
Mic gain 60dB (dynamic) 45dB (electret)
Frequency response 300Hz – 10kHz ± -3dB (contoured for intelligibility)
Distortion <0.2% THD @ 1kHz
Noise- <-55dBu dynamic, <-65dBu electret
Table 14-2: Main Station: Microphone pre-amplifier
14.1.3 Headphone amplifier
Specification Description / value
152 HelixNet Partyline User Guide