NavicoXSONIC SS175M Stainless Steel Thru-Hull Tilted Medium CHIRP Transducer - 20° Element - 9-Pin

Discover Superior Underwater Detection with the SS175M Medium CHIRP Transducer

Engineered for anglers and boaters who demand crystal-clear sonar images without compromise, this stainless steel thru-hull transducer delivers exceptional performance across a variety of hull types. Its tilted 20-degree element design ensures optimal beam projection even on vessels with deadrise angles, minimizing the need for fairing blocks and simplifying installation. Whether you're chasing trophy fish in coastal waters or navigating commercial routes, the medium-frequency CHIRP capability strikes the perfect balance—punching through to impressive depths while resolving fine details like individual baitfish schools.

Crafted from durable stainless steel, it withstands harsh marine environments, including saltwater exposure on steel or aluminum hulls. Paired with a fast-response temperature sensor, it provides real-time water column data to help you locate temperature breaks where game fish congregate. The 9-pin black connector integrates seamlessly with popular sounders, unlocking a 50 kHz bandwidth that sweeps from 85 to 135 kHz, capturing everything from 88 kHz downriggers to versatile mid-range frequencies.

Key Advantages for Serious Fishermen

• Balanced CHIRP Performance: Medium frequencies offer deeper penetration than high-CHIRP options (ideal for 100-300 foot depths) and sharper target separation than low frequencies, revealing bait balls, wrecks, and bottom structure with stunning clarity.
• Versatile Beam Width: Dynamically adjusts from 24 degrees at lower frequencies to 16 degrees at the upper end, providing wide coverage for searching and narrow focus for pinpointing marks.
• Rugged Low-Profile Design: Usable shaft length of about 71mm allows flush mounting on boats up to 36 feet, reducing drag and vulnerability to underwater obstacles.
• All-Weather Reliability: Internal broadband ceramic assembly resists fouling, while the stainless housing fights corrosion for years of trouble-free service.
• Integrated Sensors: Combines precise depth readings with analog/digital temperature output, essential for jigging, trolling, or live-lining in stratified waters.

Why Choose Medium CHIRP Over Traditional Fixed Frequencies?

Unlike single-frequency transducers that lock you into one speed or depth range, CHIRP technology continuously varies the pulse to paint a hyper-detailed picture of the underwater world. Medium CHIRP shines in scenarios where high frequencies fall short on depth but low ones blur targets—think mid-depth reefs, suspended pelagic species like tuna or mahi-mahi, or structure fishing in 200-foot contours. Users report fish arches so lifelike they rival forward-facing sonar, with minimal noise from thermoclines or bait clouds.

For sportfishing boats, this means fewer missed hookups from poor returns. Commercial operators appreciate the consistent bottom tracking at speed, even in choppy conditions up to 20 knots.

Installation Insights for Peak Performance

Mounting is straightforward on fiberglass, wood, steel, or aluminum hulls—position it forward of props and struts for clean water flow. The 20-degree tilt compensates for hull deadrise between 8-25 degrees, aligning the beam perpendicular to the keel for maximum forward reach. With a 33-foot cable, routing to the helm is hassle-free. Pro tip: Pair with high-output amplifiers for full 1kW potential, and always bed in polyurethane sealant for a watertight seal.

"Switched to this from a basic 50kHz unit—night and day difference in marking stripers on wrecks. Depth and temp data alone paid for it on the first offshore trip."

Perfect Match for Your Electronics Suite

The black 9-pin XID connector supports plug-and-play with a range of chartplotters and fishfinders, enabling automatic frequency tuning and software updates. It's a go-to upgrade for vessels chasing everything from inshore snapper to bluewater billfish, where reliable sonar is non-negotiable.