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Remote Station

  • Easy to use front panel with OLED displays & backlit keys
  • Headset or hands-free support with speaker and mic
  • 4 Keysets assignable to channels
  • All Talk, Stage Announce, RMK & Program Audio level control
  • Expansion mode for 8-24 channels


  • Ethernet Network port with PoE(1)
  • Powerline loop-through on XLR(3)
  • Program Audio input
  • Stage Announce output
  • Contact closure input & output

HelixNet System

  • Wired Partyline - Networked
  • Hosted by Arcadia or HMS-4X(4)
  • Up to 24 Channels – Licensed
  • Up to 64 HelixNet Endpoints
  • Program Audio user level control

Effortless Management 

  • Easy to use CCM browser configuration
  • Fast front panel control & configuration
  • Central discovery & pairing on Arcadia
  • Plug-and-go Powerline to HMS-4X(4)
  • Central firmware upgrades from host

Item Code

HRM-4X (includes): (1) Inline PSU 15W 48V DC (453G026)


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: 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.


XLR Powerline**: 3-pin XLR-M/F

Ethernet/PoE*: EtherCON RJ45

Headset: 4-pin XLR–M

Gooseneck Mic: 3-pin Tuchel

Program Audio: 3-pin XLR–F

Stage Announce: 3-pin XLR–M

Hot Mic/IFB Interface: 1/4\" (0.64 cm) TRS jack

GPIO: 9-pin D-type male (1xGPI, 1xGPO)

USB: Type A

DC Power: 3-pin KPJX-PM-3-S

Microphone Pre-amplifier

Headset Mic Impedance: 200O (Dynamic)

Headset Mic Voltage: 1.7V (Electret selectable)

Limiter: +23dB

Route to 4-wire output at 0dBu out: Mic Gain: 60dB (Dynamic), 45dB (Electret)

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

Distortion: <0.2% THD @ 1kHz

Noise: <-55dBu (Dynamic),<-65dBu (Electret)

Headphone Amplifier

Load Impedance: >32O

Output Level: +12dBu before clipping

Sidetone: -12dB (selectable)

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

Frequency Response: 180Hz – 10kHz +3dB

Distortion: <0.1% THD @ 1kHz

Noise: <-65dBu

Headphone Limiter: 0dB (selectable)

Loudspeaker Amplifier

Load Impedance: 8O

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

Program Audio Line Input

Arcadia System Host: Local Listen Only

HMS-4X System Host: Local or Channel Assignable.

Maximum Level Before Clipping: +18dBu

Nominal Input Level: 0dBu (selectable)

Input Impedance: >= 10KO

Route to 4-wire output at 0dBu out: Frequency Response: 20Hz - 10kHz ±3dB

Distortion: <0.2% THD @ 1kHz

Noise: <-65dBu

Stage Announce Output

Arcadia System Host: Local SA Only

HMS-4X System Host: Local SA or Channel Assignable.

Maximum Level Before Clipping: 18dBu

Nominal Output Level: 0dBu (selectable)

Output Impedance: <= 100O

Route from a dynamic headset: Frequency Response: 300Hz - 12kHz ±3dB

Distortion: <0.1% THD @ 1kHz

Noise: <-55dBu

Hot Mic Output

Maximum Level Before Clipping: +12dBu

Nominal Output Level: 0dBu (selectable)

Output Impedance: <= 100O

Route from a dynamic headset: Frequency Response: 300Hz - 12kHz ±3dB

Distortion: <0.2% THD @ 1kHz

Noise: <-55dBu

Logic Inputs -GPI

Assignable to talk, call, mic and headset keys

Input: 1

Style: Powered input, close contact to ground

Detection Voltage (Min): 3V

Input Voltage (Max): 5V

Output Voltage: 5V

Output Current (Max): 1mA

Logic Outputs – GPO/Relay

Assignable to talk, call, SA keys and channel events

Outputs: 1

Style: Power Relay

Normalized: Open or Closed, separate pins

Switching Voltage (Max): 30V

Switching Current (Max): 2A


Voltage: 48V DC

Current (Max): 0.3A

Power (Max): 14.4W

BTU (Max): 49BTU/hr

Input Power Connector: KPJX-PM-3-S

This unit can be powered via: AC Adapter - Inline: Input Voltage Range: 100 - 240V AC

Input Frequency Range: 50 - 60Hz

Input Power Connector: IEC-C14

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: 15.4W DC max @ Power Source Req.

PD: 12.95W DC max @ Powered Device Draw

Powerline**: Input Voltage: ±29.5V DC

Input Current (Speaker Off): 0.3A

Input Current (Max): 0.5A

Powerline Utilization:

HRM (Local Power) = 1 beltpack

HRM (Speaker Off) = 2 beltpacks

HRM (Speaker On) = 3 beltpacks

Note the maximum Powerline capacity of the HMS-4X. Use HelixNet Cable Calculator to validate load and cable distance.


32º - +104ºF (0 - +40ºC) 90% relative humidity


1RU, 1.75 x 19 x 6.4in (HxWxD)

(44 x 483 x 165mm)


4lbs (1.8kg)

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


Port 80 TCP–System Management, Expansion

Port 6001 TCP–System Management

Port 6001 UDP–Audio Streams

Multicast: Port 5353 UDP–mDNS, Names, Discovery, Linking, Expansion Optional for device names and linking Mandatory for HMS/HRM Expansion

Network Parameters

HMS-4X Endpoint Resource Use: 1-3

Bandwidth: 300-600 (max) kbps from HRM to HMS dependent on use of Program Audio Input 1200-2400 (max) kbps from HMS to HRM dependent on use of Stage Announce Output

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:

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

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