Humminbird XHS-9-HDSI-180T Transom-Mount HD Side Imaging Transducer

The Humminbird XHS-9-HDSI-180T (part 710201-1) is the transom-mount HD Side Imaging transducer for compatible older Humminbird fish finder units. The 9-element design (the XHS-9 part of the model number) combines four distinct sonar functions in one transducer body: 200 kHz traditional sonar for fish marks and bottom contour view, 83 kHz wide-beam traditional sonar for broader area coverage in shallower water, 455 kHz HD Side Imaging for the wide horizontal view to either side of the boat, and 800 kHz operating frequency for the highest-detail near-field imaging. The right transom transducer for boats running compatible Humminbird HDSI-capable units (typically the older 1100, 900, 700, and 800 series Humminbird fishfinders) where the original transducer has failed or where you're adding HDSI capability to a unit that originally shipped without it.

What HD Side Imaging actually shows. Side Imaging sonar transmits high-frequency sonar pulses out to either side of the boat (port and starboard) and receives the bottom returns. The Humminbird HDSI processing renders the returns as a near-photographic horizontal view of the bottom out to roughly 240 feet to each side at 455 kHz. Drop-offs, brush piles, dock pilings, weed lines, fish-holding structure - all visible in the side view as you idle along the surface. Compared to traditional 2D sonar (which only sees what's directly under the boat), Side Imaging covers a huge area on either side of the boat's track in one pass.

Multi-beam down imaging. The transducer outputs three different down-beam angles depending on which mode the head unit selects: 20 degrees (narrow, focused beam for sharp individual fish marks at a specific depth), 60 degrees (medium beam for typical fish-finding work), and 180 degrees (wide beam for area coverage in shallower water). The selectable beam pattern lets you match the sonar coverage to the specific fishing situation - narrow for picking out individual fish, wide for surveying a larger area.

200 kHz / 83 kHz dual-frequency traditional sonar. The traditional 2D sonar runs at 200 kHz (narrower beam, sharper detail, better target separation - the right choice for most fishing situations) or 83 kHz (wider beam, deeper penetration, broader area coverage - useful for offshore deep-water sonar where the 200 kHz signal doesn't reach). Switch frequencies on the head unit based on the depth and detail level you need.

4000 watts peak-to-peak power. The transducer's high power rating (4000 W peak-to-peak corresponding to roughly 500 W RMS) provides the acoustic energy needed to penetrate deep water and produce strong returns at the head unit. Combined with the high-quality piezo-electric crystal stack inside the transducer, the high power rating is what gives Humminbird HDSI transducers their characteristic strong, clear returns at extended ranges.

Built-in water temperature sensor. The transducer includes an integrated water temperature sensor that outputs surface water temperature to the head unit. Useful for thermocline tracking (cool water above warm = thermocline depth, where fish often suspend), for matching water temperature to species temperature preferences (water at 65-70 F is prime for many warmwater species), and for noting temperature breaks across the lake where two different water masses meet (often productive fish-holding zones).

Transom-mount install. The XHS-9 is a transom-mount design with the supplied stainless-steel transom mounting bracket. Mount the bracket to the boat's transom below the lowest part of the running surface so the transducer face stays in clean water at speed (above-the-running-surface placement gets aerated water that destroys sonar performance). The bracket allows up-tilt adjustment for optimal trim alignment with the boat's running attitude. For boats where you can't transom-mount (e.g., large outboards or twin engines blocking the transom), check the trolling-motor or thru-hull alternatives in the Humminbird transducer line.

20-foot cable. The 20-foot cable length covers the typical run from the transom to a helm-mounted Humminbird fishfinder. For longer cable runs (boats with the head unit mounted at a flybridge or in a cabin), check the 30-foot or 50-foot cable variants (sold separately as different SKUs). For very short runs (small boats with the head unit at the bow), the 20-foot cable has plenty of slack to coil up neatly without affecting performance.

Compatible Humminbird units. The XHS-9-HDSI-180T is compatible with the older Humminbird fishfinders that support HDSI: the 700 / 800 / 900 / 1100 series HDSI variants. For current-generation HELIX, SOLIX, and APEX units, the transducer's connector style and the head unit's preferred transducer specification have changed - check the current Humminbird transducer compatibility chart for your specific head unit model and pick the matching current-generation transducer (typically the XNT-9 series for HELIX or XM-series for SOLIX / APEX).

Made in the USA. The XHS-9 is manufactured in the United States. The made-in-USA aspect matters for the dimensional tolerances and quality control on the piezo-electric crystal stack and the precision-machined housing - those are the components most sensitive to manufacturing variation, and U.S. manufacturing maintains the tighter tolerances that keep transducer performance consistent across units.

Install. Position the transducer bracket on the transom 6-8 inches below the lowest running surface and 4-6 inches inboard from any propeller (to keep the transducer face in clean undisturbed water at speed). Drill the supplied template's pattern of mounting holes through the transom. Bolt the bracket using the supplied stainless steel hardware (use 3M 5200 or similar marine-grade sealant on the bolt holes to prevent water entry). Adjust the transducer up-tilt so the face is parallel to the water surface at running attitude. Run the cable through the boat's wire chase to the head unit location and plug into the head unit's transducer port. Total install time is typically 1-2 hours.

What's in the box. The XHS-9-HDSI-180T transducer with attached 20-foot cable terminating in the Humminbird transducer connector, the stainless steel transom mounting bracket, the mounting hardware kit, the install instruction sheet, and the documentation pack.

1-year limited Humminbird warranty. Same-day shipping before 3 PM ET on in-stock units. Note: California Prop 65 warning applies (lead in the connector solder).