Triton's hydrophone system uses four Reson TC4013 piezoelectric elements to detect incoming sound waves. The elements output electrical signals to an analog front-end circuit board. This board provides pre-amplification, filtering, variable gain amplification and analog-to-digital conversion. Eight Microchip MCP6S21 variable gain amplifiers (VGAs) provide up to 40 dB of software adjustable gain on each channel. The signals from the VGAs are sampled at 2 MHz with 12 bits of resolution using two AD7266 ADCs. These ADCs use a proprietary SPI protocol to communicate with a Blackfin BF-537 digital signal processor (DSP), which lies on a separate circuit board within the hydrophone enclosure. The DSP estimates the heading and elevation of the sound source and sends this information to Triton's computer.

The back endcap of the hydrophone enclosure has a Seacon MCBH-6F connector to communicate with the submarine and a MCBH-8F connector for debugging with JTag. On the other endcap are four custom glands that allow the wires from the Reson elements to pass through the endcap without the elements being potted directly into the endcap. This allows more flexibility in element mounting and future use of the elements with other systems. Both endcaps have a double bore seal design similar to the battery pod pressure vessels.