4-Channel 2 Display with Shift Page Digital Speaker Station


Speaker Station

  • Easy to use front panel with OLED displays
  • Headset or hands free support with speaker and mic
  • 2 Keysets freely assignable to system channels
  • Shift page for 4-channel operation
  • Program Audio level control
  • Display swivels allowing optimal viewing angles


  • Powerline terminal plug connection
  • Ethernet Network port with PoE


  • 4-gang for flush mounting
  • Optional S-MOUNT for desktop use

The HelixNet System

  • Networked Intercom System
  • Flexible cabling
  • 12 partyline channels; expandable to 24 channels via optional license
  • Program Audio distribution with independent level controls

Effortless Management 

  • Easy to use CCM browser configuration
  • Fast front panel control and configuration
  • Plug-and-go with auto discovery
  • Central upgrades from main station

The HelixNet HKB-2X speaker station is a 4-gang flush-mountable user station with four channels over two shift pages supported by the HMS-4X main station.

Note: Access the HelixNet Cabling Calculator to calculate estimated maximum cable length for a single Clear-Com HelixNet digital partyline connection.

The HelixNet IP networking guide provides specifications, best practices and guidance for the integration of HelixNet into an existing or new IP network.

Item Part Number:


Technical Specifications


System provides 12 or 24 intercom channels. Four channels can be assigned to station keysets. System Program Audio can be associated with any channel with independent endpoint level control.


Powerline: Powerline, Terminal Block 5 pole, 5mm pitch

Ethernet/PoE: RJ45

Headset: 4-pin XLR–M

Gooseneck Mic: 3-pin Tuchel

Power Connector: Terminal Block 2 Pole, 5mm

Microphone Pre-amplifier

Headset Mic Impedance: 200Ω (Dynamic)

Headset Mic Voltage: 1.7V (Electret selectable)

Limiter: +23dB

Route to four-wire output at 0dBu out:

Mic Gain: 60dB (Dynamic), 45dB (Electret)

Frequency Response: 300Hz – 10 kHz ± 3dB, contoured for intelligibility

Distortion: <0.1% THD @ 1kHz

Noise: <-65dBu

Headphone Limiter: 0dB (selectable)

Headphone Amplifier

Load Impedance: >32Ω

Output Level: +12dBu before clipping

Sidetone: -12dB (selectable)

Route from a four-wire input at 0dBu in:

Max Gain: 0dB

Frequency Response: 40Hz – 10kHz ±3dB

Distortion: <0.1% THD @ 1kHz

Noise: -65dBu

Headphone Limiter: 0dB (selectable)

Loudspeaker Amplifier

Load Impedance: 8Ω

Output Level: +18dBu before clipping

Route from a 4-wire input at 0dBu in:

Max Gain: 18dB

Frequency Response: 200Hz – 10kHz ±3dB

Distortion: <0.1% THD @ 1kHz


Device Power

Voltage: 48V DC

Current (Max): 0.3A

Power (Max): 14.4W

BTU (Max): 49BTU/hr

Input Power Connector: Terminal Block 2 Pole, 5mm

This unit can be powered via:


Input Voltage: ±29.5V DC

Input Current (Speaker Off): 0.3A

Input Current (Max): 0.5A

Powerline Utilization:

HKB (Local Power) = 1 beltpack

HKB (Speaker Off) = 2 beltpacks

HKB (Speaker On) = 3 beltpacks

Note the maximum Powerline capacity of the HMS-4X.

Use HelixNet Cable Calculator to validate load and cable distance.

AC Adapter – Wall (not included)

Input Voltage Range: 100 – 240V AC

Input Frequency Range: 50 – 60Hz

Input Power Connector: Universal

Output Voltage: 48V DC

Output Power (Max): 15W

Output Power Connector: KPPX-3-P

PoE – Power over Ethernet

IEEE 802.3af-2003 – Class 0

PSE: 15.4 W DC max @ Power Source Req.

PD: 12.95 W DC max @ Powered Device Draw


32º – +113ºF (0 – +45ºC)

90% relative humidity


4.5 x 8.2 x 2.4in (HxWxD)

(114 x 209 x 61mm)


18.8oz (0.53kg)

Network Specifications (Version 4)
Network Protocols

Ethernet IPv4 – Unicast Audio and Control

mDNS – Multicast Device Discovery

Layer 3 routable with mDNS function limitations

WavPack – Audio Codec

Network Ports


Port 80 TCP – System Management

Port 6001 TCP – System Management

Port 6001 UDP – Audio Streams


Port 5353 UDP – mDNS, Names, Discovery, Linking

Optional for device names and linking

Network Parameters

Endpoint Resource Use: 1


300 (max) kbps from each HKB to HMS

1200 (max) kbps from HMS to HKB

Network Jitter Tolerance:

<= 128ms jitter buffer per audio stream receiver automatically adjusted to network performance

QoS tags:

DSCP=46, High Priority / Expedited Forwarding (EF)

Link-Local Default IP address range:

System reserved IP range: for endpoints

Recommended Ethernet Switches

Managed Ethernet Switch – Layer 3

100/1000 Base-T ports for endpoints

1000 Base IP Trunks between switches

QoS configuration

Energy Efficient Ethernet bypass option

IGMP Snooping bypass option

Associated Products

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