Unlock Crystal-Clear Underwater Insights with the B258 Thru-Hull Transducer

Imagine gliding through open waters, your boat slicing effortlessly while your sonar paints a vivid picture of the depths below—schools of fish darting, rugged bottom contours revealing hidden structures, and precise depth readings guiding your every move. The Lowrance B258 thru-hull transducer delivers exactly that, blending rugged durability with pinpoint accuracy for serious boaters and anglers who demand more from their electronics.

Crafted for thru-hull mounting, this powerhouse operates at dual 50/200 kHz frequencies, pushing 1kW RMS power to conquer deep waters. Paired with its included fairing block, it minimizes turbulence and maximizes signal clarity, even at higher speeds. Whether you're chasing trophy fish offshore or mapping lake bottoms for structure fishing, the B258 transforms raw data into actionable intelligence, helping you locate prime spots faster and with greater confidence.

Standout Performance Features That Set It Apart

• Dual-Frequency Versatility: Switch seamlessly between 50 kHz for expansive deep-water coverage and 200 kHz for sharp, detailed shallow-water imaging—ideal for adapting to varied fishing environments without swapping gear.
• High-Power Output: 1kW RMS ensures strong signals penetrate deeper, delivering superior target separation and bottom tracking in challenging conditions like heavy currents or murky depths.
• Integrated Temperature Sensor: Monitor water temps in real-time to track thermoclines and baitfish movements, a game-changer for targeting species like walleye or stripers.
• Fairing Block Included: Streamlines water flow over the transducer face, reducing dead zones and boosting performance up to planing speeds for reliable readings underway.
• Robust Bronze Construction: Built tough with a marine-grade bronze housing that withstands corrosion, impacts, and the harshest saltwater assaults.

Unlike basic transducers that falter in rough seas or lose detail at speed, the B258 maintains exceptional bottom hardness discrimination and fish arch resolution. Anglers report spotting wrecks and drop-offs with ease, turning average outings into record-breakers.

Seamless Integration for Peak Results

Engineered to pair flawlessly with Lowrance chartplotters and fishfinders supporting high-power sonar, this transducer elevates your setup without compatibility headaches. Its 20-degree beam at 50 kHz casts a wide net for offshore scouting, while the narrower 12-degree beam at 200 kHz hones in on tight targets nearshore.

Pro tip: Position it forward on the hull for optimal forward-facing coverage, ensuring bubbles from props don't interfere. Deadrise compensation via the fairing block keeps beams perpendicular to the seabed, sharpening your view of structure and fish.

Real-World Applications for Boaters and Anglers

Offshore adventurers use the B258 to probe 1,000+ feet for swordfish and tuna, its deep-water prowess cutting through layers to reveal bait balls and upwellings. Inshore, bass pros leverage its temp data alongside high-res imaging to dial in post-spawn patterns around submerged timber.

For tournament anglers, the edge comes from consistent bottom lock—no more guessing in 200-foot-plus depths. Sailors and cruisers appreciate the thru-hull design's low-profile install, preserving hull integrity while providing navigation-critical depth info.

Backed by years of field testing, this transducer isn't just equipment; it's a trusted ally that sharpens your instincts and boosts success rates on the water.