A5 Hydrophone

The A5 provides our highest sensitivity and most linear response within the human auditory range. Its modular architecture and compact form factor enable flexible integration across a wide range of applications. Integrated signal conditioning ensures consistent performance with audio recorders operating on phantom or plug-in power.

The compact body allows the hydrophone to be easily inserted into plumbing and other tight spaces for leak detection applications. A threaded mounting interface also enables secure integration into marine and industrial devices such as dive cameras, smart buoys, and autonomous rovers. With the optional threaded weight installed, the A5 delivers our best performance for deep water audio recording.

The A5 uses a low-profile 3.5mm TRS output plug that is easy to pass through cable glands or penetrators and allows for the option of adding optional accessories. It is designed to connect directly with standard digital recorders that offer plug-in power on a standard mini jack. It can be powered from one leg of phantom power, as used in microphone preamps with XLR input. However, we recommend using the PIP>XLR adapter for lower noise and true low-impedance, balanced output. NOTE: TRRS jacks, typically used for headsets with cell phones and computers, will require an adapter to break out the separate mic and headphone jacks. The A5 will not work directly with AUX or LINE jacks, such as used on marine stereos and powered speakers, as these will not supply plug-in power and do not offer adequate gain.

Specifications:

• Sensitivity: -173dBV re: 1uPa (-193 sensor + 20dB integrated signal conditioning)
• Linear bandwidth 20Hz - 10KHz (+/-4dB)
• Directivity: Omnidirectional (<20KHz)
• Max depth: 100 meters
• Output connector: 3.5mm TRS (wired dual mono--tip and ring output; sleeve ground)(5.5mm outside diameter)
  
• Plug-in Power required (2.4V, 400uA min. 48V, 10mA max--see additional notes about connections above)

See product images for dimensions and response plot.

Hydrophones with cable lengths of 3-20m are now packaged and shipped in an EVA case.

'Custom length' price includes 0.5m cable length. For additional cable length, please purchase CA-53 cable separately. Cable will be added to the hydrophone unless we receive other instructions. If ordering multiple hydrophones, or buying bulk cable, leave instructions in the order notes. Custom lengths sold in even-meter lengths only.

No Weight: Hydrophone is close to neutral buoyancy.

Optional Weight: 114 gram cable weight that threads onto A5 body. Assists in sinking the hydrophone and dampens vibrations in cable. Low-drag shape. Shipped separately. You may also request we build your hydrophone with the weight already attached for longer cable lengths, though note that it may add to you lead time.  Please request this service in your order notes. This is highly recommended if you are purchasing a hydrophone cable that is longer than 15m - if no direction is given, we will likely contact you after receiving your order to determine the correct procedure for your needs. For further details, please visit A5-WT.

Reseller accommodation and Quantity discounts: Please see our policies page for details.