Clear-Com HKB-2X HelixNet 4-Channel Speaker 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.

This innovative front panel user station provides two keysets assignable to any intercom channel to each of the two pages, which the user can toggle between for a total of four channels. The station's displays can be swiveled for optimal viewing angle. The user station is provided with a headset connection, gooseneck mic connector, loudspeaker and Program Audio level controls.

Clear-Com HKB-2X Features

• 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

• HKB-2X HelixNet 4-Channel Speaker Station1

• HelixNet System Hosts
  • Arcadia: Supports up to 64 HelixNet endpoints (HRM-4X, HKB-2X & HXII-BP) over Ethernet. Up to 24 Channels can be HelixNet Enabled using a Licensed Port for assignment to any HelixNet endpoints keyset.
  • HMS-4X(3): Supports up to 64 endpoints (HRM-4X, HKB-2X, HBP-2X, HXII-BP, HLI-2W2, HLI-4W2, LQ port). User stations can connect via HMS’s 2 Powerlines (see datasheet for limits) or over Ethernet via optional HLI-ET2 module. HMS allows use of 12 channels which can be expanded to 24 using optional license.
• Connectors
  • Powerline(2): Powerline, Terminal Block 5 pole, 5mm pitch
  • Ethernet/PoE(1): RJ45
  • Headset: 4-pin XLR–M or 7-pin XLR-M with (2) PTT GPI (-X7)
  • 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
  • Noise: <-50dBu
• Logic Inputs – PTT/GPI (-X7 only)
  • Assignable to talk, call, mic and headset keys
  • Input: 2
  • Style: Powered input, close contact to ground
  • Detection Voltage (Min): 3V
  • Input Voltage (Max): 5V
  • Output Voltage: 5V
  • Output Current (Max): 1mA
• 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
• Environmental
  • 32º – +113ºF (0 – +45ºC)
  • 90% relative humidity
• Dimensions (HxWxD)4-Gang NEMA, 4.5x8.2x2.4" (114x209x61mm)
• Weight18.8oz (0.53kg)
• Network Specifications (Firmware Version 4.2+)
  • Network Protocols
    • Ethernet IPv4 – Unicast Audio and Control
    • mDNS – Multicast Device Discovery
    • Layer 3-Routable with mDNS function limitations
    • HTTP-Management
    • RTP-Audio Transport
    • WavPack – Audio Codec
  • Network Ports
    • Unicast:
    • Port 80 TCP – System Management
    • Port 6001 TCP – System Management
    • Port 6001 UDP – Audio Streams
  • Multicast:
    • Port 5353 UDP – mDNS, Names, Discovery, Linking
    • Optional for device names and linking
  • Network Parameters
    • HMS-4X Endpoint Resource Use: 1
    • Bandwidth:
    • 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=41, Assured Forwarding (AF)
    • Link-Local Default IP address range: 169.254.0.0/16
    • System reserved IP range: 10.0.0.0/8 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
  • Please refer to the Clear-Com HelixNet Network Guide for additional switch settings and network characteristics.
• Notes
  • (1) Ethernet to HMS-4X requires HLI-ET2
  • (2) Not available for Arcadia. Contact Clear-Com
  • (3) HMS-4X is a legacy product as of 2022