GeoSpectrum designs and manufactures a variety of wide-band omnidirectional hydrophones which include an integral low-power, low-noise, voltage- or current-signalling preamplifier. GeoSpectrum’s hydrophones can be configured to operate over customer-defined bandwidths, required sensitivity, and allow for customizable gain. The depth rating for each hydrophone can be tailored to meet export requirements and range from shallow- to deep-water applications.