Clear-Com HLI-FBS - Manual (Page 165)

Table 14-34: Speaker Station: Connectors
14.5.2 Microphone pre-amplifier
Specification Description / value
Headset Mic impedance: 200
Ω (Dynamic)
Headset Mic Voltage 1.7V (Electret selectable)
Limiter +23 dB
The following specified for a route to 4-wire output @ 0dBu out:
Mic gain 60dB (dynamic) 45dB (electret)
Frequency response 300 Hz – 10 kHz + / -3dB (contoured for intelligibility)
Distortion <0.2% THD @ 1 kHz
Noise- <-55dBu dynamic, <-65dBu electret
Table 14-35: Speaker Station: Microphone pre-amplifier
14.5.3 Headphone amplifier
Specification Description / value
Load impedance >32
Ω
Output level +12dBu before clipping
Sidetone -12dB (selectable)
The following specified for a route from a 4-wire input @0dBu in:
Max gain 0dB
Frequency response 40 Hz - 10 kHz ±3dB
Distortion <0.1% THD @ 1 kHz
Noise <-65dBu (@ max gain)
Headphone limiter -0dBu (selectable)
Table 14-36: Speaker Station: Headphone amplifier
165 HelixNet Partyline User Guide