HUMMINBIRD XNT-9-HW-MSI-150-T TRANSOM MOUNT TRANSDUCER
Quick take
This transom-mount transducer is designed to pair with compatible Humminbird HELIX 7 G3/G3N and select HELIX 7 CHIRP MEGA Side Imaging setups. It combines MEGA Side and MEGA Down Imaging with Dual Spectrum CHIRP 2D sonar, plus a built-in temperature sensor. The biggest caveat is that this is not a universal transducer, so double-check compatibility with your HELIX 7 model before buying.
Pros and cons
Pros
- Supports MEGA Side Imaging and MEGA Down Imaging for side-to-side and down-looking views.
- Dual Spectrum CHIRP 2D sonar is intended to help with fish arches and target separation.
- Includes a built-in temperature sensor, useful for interpretation and day-to-day monitoring.
- 20-foot cable length and transom-mount hardware are included for a straightforward install.
Cons
- Compatibility is key, it is built around specific HELIX 7 MEGA Side Imaging setups.
- You only get best results when your sonar unit and settings are set up for MEGA SI/CHIRP use.
What buyers think
Buyer-review evidence is limited but consistent in the themes that matter for a transducer purchase. Multiple reviews describe it as an exact match for their HELIX 7 unit and say installation went smoothly. Shoppers also emphasize that it performs as expected after installation, and at least one review highlights that the package includes what they needed for the swap. Overall sentiment appears to be centered on fit (correct part for the HELIX 7), ease of install, and basic operational performance.
What this transducer is for
The Humminbird XNT-9-HW-MSI-150-T is a transom-mount transducer built for imaging-focused fishing and scanning. It’s aimed at anglers who want the familiar MEGA Side and MEGA Down Imaging experience, plus a Dual Spectrum CHIRP 2D sonar view for fish-catching situations where arches and separation are useful.
Key features that affect real-world use
MEGA side and MEGA down imaging coverage
MEGA Side Imaging and MEGA Down Imaging are intended to give you picture-like detail both to the side and below the boat. The stated side-to-side reach is up to 250 feet, with down-looking coverage up to 75 feet. If your fishing is structure-focused, that side-to-bottom perspective is usually the main reason to choose this type of transducer.
Dual Spectrum CHIRP 2D sonar
This transducer also includes Dual Spectrum CHIRP 2D sonar (150–220 kHz), intended to help reveal fish arches and improve target separation. The maximum measuring depth is listed up to 1200 feet, which is relevant if you fish deeper water and want capability for a wider range of spots.
Built-in temperature sensing
A built-in temperature sensor is included. This can be helpful for tracking water temperature changes and adding context to what the sonar is showing during a day on the water.
Compatibility and mounting: the make-or-break details
This is designed as a transom-mount accessory, and it’s specifically made for compatible HELIX 7 models that support MEGA Side Imaging. Look for compatibility with HELIX 7 G3 and G3N variants, particularly where MEGA Side Imaging is supported. If your HELIX 7 setup does not match the intended imaging configuration, you may not get the features you’re shopping for.
Pros and cons, in plain terms
When it’s a great fit
- You have a compatible HELIX 7 setup and want to add or replace a MEGA Side Imaging transducer.
- You fish in places where imaging helps you map structure, and you want down-looking views too.
- You want both imaging (side and down) and CHIRP 2D sonar capability in one transducer.
When you should pause
- You are using a HELIX 7 model that is not confirmed for this MEGA SI transducer pairing.
- You want a one-size-fits-all replacement transducer and you have not verified connector and feature support for your specific unit.
Price and availability
Pricing can vary by retailer. If you want the quickest way to confirm current cost and shipping options, check the latest listing here: Buy on Amazon.
Verdict
The Humminbird XNT-9-HW-MSI-150-T transom-mount transducer is a strong choice if you’re building out (or replacing) a compatible HELIX 7 MEGA Side Imaging system. Its combination of MEGA Side/Down Imaging, Dual Spectrum CHIRP 2D sonar, and built-in temperature makes it a practical imaging-first option. Just be sure your HELIX 7 model and setup are compatible, because that’s the main factor buyers need to get right before installation.
FAQ
What sonar technologies does the HUMMINBIRD XNT-9-HW-MSI-150-T support?
It supports MEGA Side Imaging and MEGA Down Imaging, plus Dual Spectrum CHIRP 2D sonar (150–220 kHz).
Is this transducer compatible with all Humminbird HELIX units?
No. It’s designed for compatible HELIX 7 models that support MEGA Side Imaging, including HELIX 7 G3 and G3N variants.
Does it include temperature sensing?
Yes, it includes a built-in temperature sensor.
How long is the cable?
The transducer includes a 20-foot cable.
What mounting style does it use?
It’s a transom-mount transducer.
Specifications
| Product Title | HUMMINBIRD XNT-9-HW-MSI-150-T TRANSOM MOUNT TRANSDUCER |
|---|---|
| Category | Electronics > Car & Vehicle Electronics > Marine Electronics > Fish Finders & Depth Finders |
| Brand | Humminbird |
| Manufacturer | Humminbird |
| Model Name | 73635 |
| Model Number | 710297-1 |
| Item Weight | 1.5 Pounds |
| Display | LCD |
| Maximum Measuring Depth | 1200 Feet |
| Mounting Type | Transom Mount |
| Brand Name | Humminbird |
| UPC | 082324053498 |
| Global Trade Identification Number | 00082324053498 |
| Manufacturer Part Number | 710297-1 |
| Included Components | Transom mount transducer (includes built-in Temperature) with 20 ft cable length; Mounting hardware; Installation instructions |
| Unit Count | 1.0 Count |
| Warranty Description | 1 year Manufacturer |
| Item Type Name | Fish Finder Transducer Accessory |
| Display Type | LCD |
| Maximum measuring depth | 1200 Feet |
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