Echonautics BT70MB300-18 300w 95-155kHz Medium CHIRP 18d Tilted Element Bronze TH

The Echonautics BT70MB300-18 300w 95-155kHz Medium CHIRP 18° Tilted Element Bronze TH transducer is purpose-built for anglers and boaters who demand reliable, high-speed sonar performance in serious freshwater and saltwater applications. This low-profile thru-hull CHIRP transducer bridges the gap between tournament-grade imaging and practical durability, offering the speed-friendly design that modern multi-species fishermen require. Whether you're running a center console at cruising speed or need crystal-clear bottom detail in deeper structure, this mid-range frequency band delivers the acoustic performance to locate and track fish with confidence.

The 300-watt power output paired with dual-frequency CHIRP coverage spanning 95–155 kHz produces exceptional target separation and fish-holding structure detail across variable water conditions and depths. The 18° tilted element is engineered to match typical vessel deadrise angles, minimizing turbulence and drag while maintaining optimal acoustic cone projection even at displacement and planing speeds. Bronze construction resists corrosion in saltwater environments, while the thru-hull mounting design keeps the transducer profile minimal—critical for high-speed stability and fuel efficiency. The CHIRP sonar technology continuously sweeps frequencies rather than pulsing fixed tones, resulting in superior bottom definition and the ability to differentiate baitfish from gamefish with remarkable clarity.

This transducer is ideal for anglers running fiberglass hulls on boats between 20–45 feet, particularly those with deadrise angles in the 15–22° range where the tilted element will perform optimally without requiring custom mounting brackets. Professional and recreational users benefit equally from the balance of imaging clarity, speed tolerance, and build quality that this mid-frequency CHIRP package provides. Proper installation in a thru-hull pocket with a fairing block will ensure maximum acoustic transmission and longevity; consult your sounder's integration guide to confirm compatibility with your existing chartplotter or fish finder display.