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Hardware > Tools > Measuring Tools & Sensors > TransducersHumminbirdSold by Humminbird Johnson Outdoors
XNT 9 HW MDI 75 T - HELIX 7/8 MEGA DI, Dual Spectrum CHIRP w/ Temp Transom Transducer
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$239.99
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SKU: 1103412
Overview
Built for anglers using compatible HELIX 7/8 units, this transom-mount transducer supports MEGA Imaging/455 kHz and Dual Spectrum CHIRP 2D sonar with a 150–220 kHz range. It includes a built-in temperature sensor, a rugged composite body, an impact-release mounting bracket, and a 20-foot cable for installation flexibility. The setup is aimed at sonar and imaging use from the transom, with features focused on practical mounting and data delivery rather than extra complexity.
Why Hunters Choose the Humminbird
Supports Mega
Imaging and 455kHz for compatible
Dual Spectrum
150-220kHz CHIRP range
Built-in Temperature
Sensor adds water temperature monitoring
Rugged Composite
Design suits demanding transom-mounted use
Impact-release Mounting
Bracket helps reduce damage from
Key Features
- Supports MEGA Imaging and 455 kHz for compatible Humminbird HELIX 7/8 units.
- Works with Dual Spectrum CHIRP 2D Sonar across a 150-220 kHz CHIRP range.
- Built-in temperature sensor adds water temperature data at the transducer.
- Rugged composite design is paired with an impact-release mounting bracket.
- Includes a 20-foot cable for transom-mounted installation.
Best Used For
- For anglers using HELIX 7/8 units with MEGA DI and Dual Spectrum CHIRP compatibility
- For transom-mounted sonar setups needing a built-in temperature sensor and 20-foot cable
- For boat owners wanting an impact-release mounting bracket for added transducer protection
- For users who need MEGA Imaging/455kHz and 150-220kHz CHIRP sonar support
Specifications
| Cable Length | 20' cable |
|---|---|
| Chirp Range | 150-220kHz |
| Compatibility | HELIX 7/8 MEGA DI |
| Design | Rugged composite design |
| Mounting Bracket | Impact-release mounting bracket |
| Sonar Support | MEGA Imaging/455kHz and Dual Spectrum CHIRP 2D Sonar |
| Temperature Sensor | Built-in temperature sensor |
| Transducer Type | MEGA Down Imaging Transom Mount Transducer |
Pros
- Supports MEGA Imaging and 455kHz for compatible Humminbird systems
- Dual Spectrum CHIRP 2D sonar with 150-220kHz CHIRP range
- Built-in temperature sensor adds water temperature monitoring
- Rugged composite design suits demanding transom-mounted use
- Impact-release mounting bracket helps reduce damage from strikes
- Includes a 20-foot cable for flexible installation
Considerations & Trade-offs
- Designed as a transom-mount transducer, so it’s intended for boats set up to use that mounting style rather than universal placement.
- Built for HELIX 7/8 MEGA DI compatibility, so it should be matched to supported Humminbird units rather than assumed to fit every sonar display.
- The 20' cable provides installation flexibility, but cable routing and mounting location still need to be planned around the boat layout.
- Includes an impact-release mounting bracket, which adds protection in contact situations but also means the mount is designed to release under impact rather than stay rigidly fixed.
Suggested Comparisons
- Transom mount transducer
- Down imaging transducer
- CHIRP sonar transducer
- Humminbird HELIX 7/8 compatible accessories
Suggested Accessories
- Transducer mounting bracket
- Transom mount hardware
- Sonar cable extension
- Protective transducer cover
Frequently Asked Questions
What Humminbird units is this transducer intended for?
The product title identifies it as a HELIX 7/8 MEGA DI transducer. Beyond that, the provided data does not list additional compatible models.
What sonar functions does it support?
It supports MEGA Imaging/455 kHz and Dual Spectrum CHIRP 2D Sonar, with a CHIRP range of 150-220 kHz.
Does it include a temperature sensor?
Yes. The description states that it includes a built-in temperature sensor.
What mounting setup comes with it?
It is a transom-mount transducer and includes an impact-release mounting bracket.
What is included in the package?
The listed inclusions are the transducer, built-in temperature sensor, impact-release mounting bracket, and a 20' cable.