HelixNet | User Guide
Specification Description / value
Mic gain 60dB (dynamic) 45dB (electret)
Frequency response 300Hz – 10kHz + / -3dB (contoured for intelligibility)
Distortion <0.2% THD @ 1kHz
Noise- <-55dBu dynamic, <-65dBu electret
20.8.3 Headphone Amplifier
Specification Description / value
Load impedance >32Ω
Output level +12dBu before clipping
Sidetone -12dB (selectable)
Routed from a 4-wire input @0dBu in:
Max gain 0dB
Frequency response 40Hz - 10kHz ±3dB
Noise <-65dBu (@ max gain)
Headphone limiter -0dBu (selectable)
20.8.4 Power Requirements (HXII-BP)
Specification Description / value
Voltage 48V DC
Current (Max) 0.09A
Power (Max) 4W
BTU (Max) 13BTU/hr
Unit powered by Powerline
Input Voltage ±29.5V DC
Input Current (Max) 0.13A
Powerline utilization
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