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Amron International Amcom ™ II 2-Diver Rack Mount Communicator with Helium Speech Unscrambler and Call Indicator

SKU: 2825R/24/26DSP2-4002 Rate this product


Availability: Contact us for availability

Restrictions / Notifications

  • This item cannot be cancelled or returned once an order has been placed.

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  • 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 diver’s microphone performance
  • Treble Boost Control feature allows for optimum frequency enhancement and improved intelligible speech from the 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 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
  • Call Indicator 

Rechargeable with Internal Charger 2-Diver Rack Mount DSP2 Communicator: Part Number 2825R/24/26DSP2-4002 Includes

  • Hand-Held Push-to-Talk Microphone: Part Number 2405-28
  • (2) 6VDC Spring-Top Gel-Cell Rechargeable Batteries: Part Number 2890-04 - Expected life: 20 Hrs
  • MS Connector – 20 Pin: Part Number MS-3106A-28-16P
  • MS Connector Cable Clamp: Part Number MS-3057-16A
  • Power Cord: Part Number P-2392
  • User Manual



  • Audio Power Output: 20 Watts per channel
  • Frequency Response: 300Hz to 12kHz
  • Isolation Transformer: Split Bobbin Medical Grade
  • Dimensions: 7 in. H x 19 in. W x 13in. D (17.8 cm x 48.3 cm x 33.0 cm)
  • Weight: 20 lbs (9.1kg)
  • Power: 110/220VAC 50/60 Hz (automatic sensing), or 2 Internal Batteries 12VDC

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.

2 and 3 Year Extended Warranties are available for this product. Please refer to the Documents Tab for further information on these programs.


Amron's line of Rack Mount Communicators are the most versatile and powerful communicators 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 up-link and the down-link paths.You can set the volume for each diver and tender to their individual comfort level. Both divers can be set up on 4-Wire or 2-Wire mode, or one diver on 4-Wire and the other diver on 2-Wire mode, or any combination of the two modes.

Comes standard with rear mounted MS connector, providing connections to diver and tender inputs and outputs. All rack mount radios include a hand-held, push-to-talk microphone.


Additional Information

Brand Amron International
Communication Mode 2-wire/4wire
Video No

Product FAQ's

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  • Can you stack the banana plugs from the diver's communicators cable so you can have two divers on each diver channel?

    Although it may be possible, we stronly discourage such operation. The added workload would cause overheating and stress to the amplifier card. Prolonged use in this condition will eventually cause perment damage and failure to the amplifier card.

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  • Should I use a GFI when operating my radio off AC power?

    When operating your Amron Diver Communicator on AC, it is critical to use a Ground Fault Circuit Interrupter (GFCI) or isolation transformer for tender and diver safety. Surges and spikes are common on AC lines found on ships, generated locally, or at the end of long extension cable runs and can exceed 1kVolt. Such surges and spikes can cause the fuses, F1 and F2, to blow on the battery charger board and in extreme cases damage the charger circuitry. The battery charger is designed so that such a failure will be isolated and will not cause a safety issue to the tender or divers. It is strongly advised that your Amron Diver Communicator be operated on an AC circuit with a high quality surge arrester or an AC isolation transformer.

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  • When my battery does not appear to be holding a charge, how do I know if the problem is a bad battery or if the charger is broken?

    To determine whether the problem is with the battery or charger you will need to verify if the charger is properly charging the battery.
    Troubleshooting: Unplug your communicator and turn on the POWER switch. Measure the voltage across the yellow PUSH-TO-TALK (PTT) jack and write down this value for future reference. It should be greater than 9 Volts. Plug the communicator into an AC source and verify that the AC POWER LED on the front panel turns on. Re-measure the voltage across the PTT jack and note it down for future reference. It should be higher than the previous measurement. If this AC POWER LED does not light up when the communicator is plugged in, then check fuses F1 and F2 on the charger Printed Circuit Assembly (PCA). Allow the communicator to charge overnight. Unplug the communicator and re-measure the voltage across the PTT jack. If it is the same or less than the voltage you measured previously, then the charger is broken and the communicator needs to be sent in for repairs If it is the same or less than the voltage you measured previously, then the charger is broken and the communicator needs to be sent in for repairs. If the voltage higher than previous measurement but less than 13.5 Volts, then the battery is bad and needs to be replaced. If it is greater than 13.5 Volts but it still appears that the battery is not holding a charge, contact Amron for additional support. less than 13.5 Volts, then the battery is bad and needs to be replaced. If it is greater than 13.5 Volts but it still appears that the battery is not holding a charge, contact Amron for additional support.

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  • How can I test for a blown fuse on my Amcom II series communicator?

    If the unit is plugged into a live outlet and turning on the switch does not cause the AC POWER LED to light up, then the fuse(s) are probably blown. Unplug the unit from the outlet, remove the fuses and check continuity with a multimeter. Replace any fuse that does not show continuity.

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  • Can two batteries be charged at the same time if I run a splitter inline?

    Yes, but it will take twice as long to charge the batteries.

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  • Does the noise reduction filter remove all the background noise from the diver's topside audio?

    Depending on the settings you’re using, the sound level of the background noise could be reduced by as much as 50%, but it will never be eliminated.

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  • How do I install a new microphone in my Amcom II Communicator?
    Please refer to the Panel Microphone Installation instructions located in the attachments tab.
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  • Can my Amcom communicator work on 240V / 60Hz?
    Yes, the unit will operate on 240V 50/60Hz.
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  • Why does the speaker on my communicator sound muffled?
    The simplest way to fix this issue is to unplug the red banana plug from the red microphone 5-way binding post on the communicator and rotate it 180 degrees then reinstall it. This should fix your problem. For a more detailed explanation of what happened, please read below. The issue is not with the communicator, it is with the wiring of the umbilical. There is always the potential for wiring the speakers and microphone out of phase, similar to wiring the speakers on a car stereo system. There is an orientation to the banana jacks and they should be wired for proper phasing with the communicator. A banana plug does have an identified ground side marked on the plug. Amron always sets up their umbilicals so that the ground side is located on the left side so the user can consistently plug in their umbilical and avoid phasing issues. If a banana plug is plugged upside down or is wired out of phase, the sound quality will be significantly reduced. If the phasing is out and the orientation of both plugs are the same, then the banana plug wiring should be reversed on “only one plug” to avoid this issue again. It does not matter which plug you choose to reverse the wiring on.
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