Humminbird XPTH-9 Transducer MEGA SI+ DI+ CHIRP Thru-Hull

Overview

Who This Is For: Anglers running HELIX 8, 9, 10, or 12 MEGA SI+ units who need a high-performance thru-hull transducer for deep-water structure fishing, suspended fish, and detailed side imaging. If you're fishing lakes where you need to see 800 feet to the side and 1,200 feet down, this is your transducer.

Product Summary: This is a thru-hull transducer that delivers MEGA Side Imaging+ and Down Imaging+ plus traditional CHIRP 2D sonar in one package. It gives you photographic-quality side and down views of structure, weed lines, and fish, plus a built-in temperature sensor to track water conditions. The 30-foot cable and composite construction mean it's built to last on a working boat.

Key Features

• MEGA Side Imaging+ at 1075–1150 kHz — produces wide-angle, high-resolution images up to 400 feet to the side of your boat — you'll spot fish suspended near cover and distinguish individual baitfish schools in real time.
• MEGA Down Imaging+ at 1075–1150 kHz — creates photo-like images straight below your boat to 200 feet — critical for identifying hard bottom, brush piles, and the difference between keeper-sized fish and shorts.
• Dual Spectrum CHIRP 2D Sonar (150–220 kHz range) — traditional sonar with switchable frequency bands to 1,200 feet — your backup for deep structure and a cleaner read on suspended fish in open water.
• High-frequency Secondary Channels (455 kHz and 800 kHz) — fills in the gap between MEGA imaging and standard CHIRP, giving you flexible depth and detail options depending on your fishing scenario.
• Built-in Temperature Sensor — streams water temperature to your display — helps you track seasonal movement and locate thermal breaks in stratified lakes.
• 30-Foot Cable — longer cable run means flexibility in transducer placement on larger boats without a second cable splice.
• Composite Thru-Hull Design — lightweight, corrosion-resistant material that won't delaminate or fail in freshwater or saltwater exposure over years of use.

Specs & What's Included

Compatibility: This transducer is designed exclusively for Humminbird HELIX 8, 9, 10, and 12 MEGA SI+ GPS G3N units. Do not attempt to use it with non-MEGA HELIX models or other brands' systems — the cable connector and sonar protocol are proprietary. Not sure if this works with your setup? Call or text us at (833) 831-4077 — we'll tell you straight.

In the Box: One XPTH-9-HW-MSI-T thru-hull transducer with 30-foot cable and temperature sensor. Mounting hardware and installation adhesive are not included — you'll need a thru-hull kit for your specific boat hull type.