Humminbird XM 9 Transducer MEGA DI+ CHIRP Transom Mount

Overview

Built for anglers running Humminbird HELIX G3N units who need serious imaging power on a budget. If you're running a HELIX 8, 9, 10, or 12 G3N and want to upgrade from basic sonar to MEGA Down Imaging and Dual Spectrum CHIRP, this transom mount transducer is your entry point.

This is a pure imaging transducer that plugs into your existing HELIX unit and unlocks MEGA Down Imaging (up to 1150 kHz for photographic-quality bottom structure), plus Dual Spectrum CHIRP 2D sonar. You get three depth-finding modes in one package: shallow high-frequency imaging for detail, mid-range CHIRP for fish, and deep-water capability out to 1200 feet. It's rugged, comes with a 20-foot cable, and includes the mounting bracket—ready to bolt to your transom.

Key Features

• MEGA Down Imaging — captures structure and bottom composition at 1075-1150 kHz with clarity that shows you brush piles, drop-offs, and isolated rocks—you'll see what fish are relating to instead of guessing.
• Dual Spectrum CHIRP 2D Sonar — full 150-220 kHz range with narrow and wide bandwidth options; 1200-foot max depth puts you on suspended fish and deep structure other anglers miss.
• Multiple frequency bands — 455 kHz for medium-range detail (400 feet), 800 kHz for shallow precise imaging (125 feet), and MEGA DI+ for extreme clarity; switch between them on the fly to match your water and target.
• Built-in temperature sensor — water temp data helps you identify thermocline depth and seasonal fish movement without a separate probe.
• Transom mount with impact-release bracket — secures to your transom cleanly, quick-disconnects if you take a hard hit, and deploys/retracts without tools.
• 20-foot cable — enough run from transom to helm on most center consoles and open boats; if your boat is longer or you need to route the cable, contact us.

Specs & What's Included

Compatibility: Works exclusively with Humminbird HELIX 8 G3N, HELIX 9 G3N, HELIX 10 G3N, and HELIX 12 G3N equipped with MEGA DI+ or MEGA SI+ sonar capability. This is a standalone transducer—your HELIX unit must be on the boat already. Not sure if this matches your setup? Call or text us at (833) 831-4077—we'll confirm compatibility straight.

In the Box: XM 9 HW MDI T transom mount transducer, impact-release mounting bracket, 20-foot transducer cable. Mounting hardware for transom installation is included.