Amron International Amcom ™ II DSP2 Helium Speech Unscrambler – 2 Diver – Portable

Amron International Amcom ™ II DSP2 Helium Speech Unscrambler – 2 Diver – Portable

SKU: 2825A/24/26DSP2


  • Real-time audio processing uses both frequency and time domain technologies for optimized performance over a wide range of depths and background noise

  • Treble Boost Control provides means of adjustment to enhance the commercial diver’s microphone performance

  • Treble Boost Control feature allows for optimum frequency enhancement and improved intelligible speech from the commercial diver’s voice

  • The Depth Control increases or decreases the diver’s depth algorithm changing the amount of correction to the raw helium speech

  • Mode Switch allows for two choices of operation

    • Mode A is typically used for shallow depths with lower concentrations of helium

    • Mode B is used for deeper depths requiring higher concentrations of helium

  • Advanced Noise Reduction Filter (NRF) incorporates a complex DSP algorithm which filters out background noise while allowing the commercial diver’s speech to be clear and intelligible

  • Noise Reduction Filter has four adjustment levels for the reduction of background noise in both depth modes A and B

    • Mode A, simply toggle the mode switch from A to B and back to A – Each time a toggle cycle is completed, the filter will advance to the next level

    • Mode B, simply toggle the mode switch from B to A and back to B – Each time a toggle cycle is completed, the filter will advance to the next level

he Amcom ™ II 2825A series of commercial diver communication systems are full-featured, hard-wired, two-diver communicators for mixed gas commercial diving.

Amron’s new DSP2 Helium Speech Unscrambler (HSU) utilizes the latest in technological advancements. The heart of our design incorporates dual digital signal processors. This revolutionary concept allows our HSU to be truly the first unscrambler to use both frequency and time domain technologies for real-time audio processing. This state-of-the-art digital design accommodates a multitude of functions ranging from the correction of the diver’s raw helium speech to normal intelligible voice levels, advanced treble boost and complex noise reduction filters (NRF).

The Amcom ™ II Series 2825A communicator is the most versatile and powerful two-diver communicator on the market today. The most unique feature is the design of separate channels and volume controls for each diver and the tender, both for the uplink and the downlink paths. Each diver may have different equipment such as microphones and speakers or different listening and speaking characteristics. You can set the volume for each diver and tender to their individual comfort level. Both divers can be set up on 2-wire and/or 4-wire mode, or one diver on 4-wire mode and the other on 2-wire mode or any combination of the two modes.


  • Audio Power Output: 22 Watts per channel
  • Frequency Response: 300Hz to 12kHz
  • Isolation Transformer: Split Bobbin Medical Grade
  • Dimensions: 10 in. H x 9 in. W x 14.5 in. L (25.4 cm x 22.9 cm x 36.8 cm)
  • Weight: 22 lbs (9.98 kg)
  • Power: 110/220VAC 50/60 Hz (automatic sensing), or Internal/External Batteries 12VDC

DSP2 Helium Speech Unscrambler Radio – 2-Diver – Portable – Rechargeable with Internal Charger: Part Number 2825A/24/26DSP2 Includes

  • Hand-Held Push-to-Talk Microphone: Part Number 2405-28
  • (1) 12VDC Slide Terminal Gel-Cell Rechargeable Battery: Part Number 2890-05 – Expected life: 20 Hrs
  • User Manual

Tech Note

All communicators will transfer topside noise to the diver when using the radio speaker only. To eliminate background noise and achieve clear concise communications, use a Push-to-Talk microphone, headset, or a Remote Walk-and-Talk with a headset.

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