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Aquarian Audio H2d

H2a, quality basic hydrophone
  • Aquarian Audio H2d
  • Aquarian Audio H2d
The H2d hydrophone, updated version of the H2a, is designed to work with any recording device, computer, or transmitter that offers a plug-in-powered, 3.5mm microphone input.
Includes a low noise internal impedance buffer amp.
Operation is very simple: just connect to your recorder or computer and use.
Plug-in power (PIP) is present in nearly all devices with a microphone jack of this size. 
Check the user manual for your device to be sure.  Check your recording device where PIP may need to be switched on.

The H2d offers:
  • Low cost.
  • Low self-noise.
  • Good sensitivity.
  • Robust design handles accidental drops and temperature extremes.
  • Compact (4.5mm Overall Diameter) Low-noise cable with tough urethane jacket.
  • Connects directly with consumer audio, wireless and computer products.
  • Adapters allow use with telephone, radio, and pro audio equipment.
  • High-quality output connector.
  • High specific gravity and streamlined shape keeps hydrophone down in currents.

COMPATIBILITY NOTES: The output connector used with H2d is also used for many other types of audio connections. The standard output is a mini-jack also used, for instance, in headphones but MUST be connected to MICROPHONE INPUT in order to properly work.
A compatible jack format does not ensure proper operation. You must check that your equipment has a stereo microphone input with plug-in-power.
SMART PHONES, TABLETS AND COMPUTERS: All smart phones and tablets that we are aware of use the same connection, if any, for both the microphone and headphones.  Many newer computers also use this combination jack that has four pins instead of three.
The H2d will not work directly with these combination jacks.  An adapter must be used in these situations.
The quality of the preamps that are built into these devices (phones, tablets and computers) is often limited.
Different options or interfaces must be considered.

MARINE STEREOS: The H2d hydrophone will not work with a line or auxiliary audio input on a marine stereo system. You do need a real, powered, Microphone input. It will connect to many stereos, but these will not supply plug-in power or adequate gain. A mic preamp is required in these situations.

DIGITAL CAMERAS AND RECORDERS: Many of the current digital recorders and cameras, when equipped with microphone input, require that you go into the menu system and switch on plug-in power. The H2d will not work correctly before doing this.


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H2d, 3m cable


H2d, 9m cable


H2d, 15m cable


H2d, 25m cable


Aquarian Audio H2d


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