ASF-2 MKII – Hydrophone

The Compact Ambient Hydrophone


The ASF-2 MKII Hydrophone is affordable, easy to use – and simply a great sounding hydrophone. Designed with key components used in the renowned ASF-1 MKII, the ASF-2 MKII effectively utilizes the same professional hydrophone technology for outstanding underwater audio capture.
With a frequency range of 70Hz-20kHz, we designed a microphone able to capture a perfect spectrum of sounds while effectively avoiding low frequency noise created by cable handling.

Designed to withstand roughest conditions

The housing is machined out of high-quality aluminium with an anodized exterior for protection against the corrosive nature of seawater, while the 10m polyurethane cable is cast into the housing for a water-tight seal. This design enables the ASF-2 MKII Hydrophone to easily withstand roughest field conditions. In addition to being an affordable hydrophone, the ground-breaking design of the ASF-2 MKII makes it affordable to operate as it is compatible with standard professional audio equipment.

Terminated with an XLR connector and powered by 48V phantom power, this plug-and-play hydrophone is designed for use with today’s professional field mixers and recorders for outstanding underwater recordings.

Never before has professional underwater audio capture been so affordable.

Technical Details
Usable frequency range: 70Hz-100kHz
Horizontal directivity: omnidirectional ±3dB at 100kHz
Vertical directivity: 270° ±3dB at 15kHz
Sensitivity: -208dB re 1V/μPa
Power supply: 48V Ph
Dimensions (L / W / H): 75 x 30 x 30 mm (incl. bend relief)
Weight: 200g (incl. cable)
Maximum depths: 50m
Material: anodized aluminum
Capsule material: seawater resistant PUR system
Operating temperature: -5°C to +50°C (23°F to 122°F)