Echonautics CB131H1kW 1kW 130-210kHz High CHIRP Bronze Thru-Hull

The Echonautics CB131H1kW 1kW 130-210kHz High CHIRP Bronze Thru-Hull transducer is built for anglers and boaters who demand detailed structure imaging and reliable performance in freshwater and saltwater environments. This through-hull mounted sounder delivers professional-grade fish-finding capability without the compromise of a portable unit, making it the choice for serious fishermen upgrading their vessel's electronics. Whether you're targeting suspended smallmouth in deep reservoirs or scanning nearshore structure for stripers, this transducer integrates seamlessly into modern marine GPS/fishfinder systems to reveal what lies beneath with clarity and precision.

Operating across the 130–210kHz dual-frequency CHIRP range, the Echonautics unit generates 1 kilowatt of power—sufficient output to cut through thermoclines, thermocline transitions, and weedy bottom conditions with minimal signal loss. The bronze through-hull housing resists corrosion from saltwater exposure and provides excellent acoustic coupling to the hull, ensuring consistent bottom contact and fish returns even at cruising speeds. CHIRP (Compressed High Intensity Radar Pulse) technology transmits a continuous sweep of frequencies rather than discrete pulses, dramatically improving target separation and reducing false echoes so you see exactly where fish are holding.

Installation requires a properly drilled thru-hull mount with appropriate sealant and backing plate to prevent water intrusion—professional installation is recommended for boats without existing transducer holes. This transducer is compatible with any Echonautics chartplotter or third-party sounder rated for 1kW 130–210kHz input, making it a cost-effective upgrade path for boats running legacy electronics. Weighing just 4 pounds and engineered for permanent mounting, the CB131H1kW delivers tournament-grade sonar performance season after season with minimal maintenance beyond periodic rinsing and a winter haul-out inspection.