C-Phone HE4R Helium Speech Unscrambler

What it does

Rack Mount 4-channel Communications System with Helium Unscrambler

Image Gallery


Every life support package should be equipped with the C-Phone HE4R Helium Unscrambler Communications System. The HE4R Unscrambler is unparalleled in its’ ability to decipher the helium speech associated with deep diving. It stands out from those offered by other manufacturers because of its’ unique 4 channel configuration. It uses a powerful digital signal processor to concurrently process four independent speech channels, whereas other systems mix the inputs together before putting the mixed signals through one unscrambler channel.

Technical Detail

Code: CT7003
Description: 4-channel Communications w/ Helium Unscrambler

Technical specification

  • Dimensions: 19" x 3U x 430mm
  • Weight: 5 Kgs
  • Power Supply: 96-230V Mains AC 50-60Hz (battery optional)
  • Standby Current: 170mA
  • Nominal Frequency Response: 300Hz to 12KHz
  • Audio Power Output: 7.8W into 8Ohm
  • Communications Channels: 4
  • Volume Control: Individual for uplink/downlink
  • Depth Range: 0-300m
  • MRT tested to 180m
  • Individual channel unscrambler adjustment
  • Settings stored after power off
  • 2-wire and 4-wire configuration
  • Integrated Speaker
  • 2x Tender Inputs
  • Individual/Combined Recording Output via RCA


Supplied with:

  • Premium operator headset


  • Saturation Diving

Also Ordered

Thanks, your enquiry has been sent successfully.

A member of our team will respond to you as soon as possible.