Hardware > Tools > Measuring Tools & Sensors > TransducersHumminbirdSold by Humminbird Johnson Outdoors

Humminbird

XM 9 MDI T - Transom HELIX MEGA DI Transducer

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Transom-mount Transducer

For Humminbird HELIX systems

Supports Mega

Down Imaging and Digital CHIRP

Includes 25/42

Degree and 45/75 degree coverage

Operates 455

KHz, 800 kHz, and 1.2

Built-in Temperature

Sensor included

$219.99
View on Humminbird Johnson Outdoors

You'll be taken to Humminbird Johnson Outdoors to complete your purchase.

Hunter's Outpost earns a commission from affiliate links at no extra cost to you.

SKU: 1096972

Overview

This transom-mounted transducer is designed for anglers using compatible Humminbird HELIX systems who want MEGA Down Imaging and Digital CHIRP Dual Spectrum in one setup. It offers the listed 25/42 degree and 45/75 degree beam options, along with 455 kHz, 800 kHz, and 1.2 MHz frequencies for detailed sonar coverage. Built-in temperature adds another layer of on-water information for monitoring conditions while fishing. It is a practical choice for boat owners setting up a transom installation and looking for a dedicated imaging transducer for serious freshwater or inshore use.

Why Hunters Choose the Humminbird

Transom-mount Design

Suits compatible transom installations

Supports Mega

Down Imaging for detailed underwater

Includes Digital

CHIRP Dual Spectrum sonar capability

Multiple Beam

Angles for flexible sonar coverage

Built-in Temperature

Sensor adds an extra data

Key Features

  • Transom-mount transducer for Humminbird HELIX systems.
  • Supports MEGA Down Imaging and Digital CHIRP Dual Spectrum.
  • Includes 25/42 degree and 45/75 degree coverage options.
  • Operates at 455 kHz, 800 kHz, and 1.2 MHz.
  • Built-in temperature sensor included.

Best Used For

  • Boat owners needing a transom-mounted transducer for HELIX MEGA DI compatible setups.
  • Anglers focused on down imaging and digital CHIRP dual spectrum sonar views.
  • Users wanting built-in temperature data from a transom mount installation.
  • Boaters working with 25/42 degree and 45/75 degree sonar coverage options.

Specifications

Beam Angles25/42 Degree and 45/75 Degree
Built In TemperatureIncluded
Frequencies455kHz/800 kHz and 1.2 MHz
Imaging TypeMEGA Down Imaging
Mount TypeTransom Mount
Sonar TypeDigital CHIRP Dual Spectrum

Pros

  • Transom-mount design suits compatible transom installations.
  • Supports MEGA Down Imaging for detailed underwater viewing.
  • Includes Digital CHIRP Dual Spectrum sonar capability.
  • Offers multiple beam angles for flexible sonar coverage.
  • Built-in temperature sensor adds an extra data point.

Considerations & Trade-offs

  • Transom-mount installation may not suit every hull or mounting preference, so compatibility should be checked before purchase.
  • This transducer is built around MEGA Down Imaging and Digital CHIRP Dual Spectrum, so it is purpose-specific rather than a general all-purpose sonar solution.
  • The listed beam angles and frequencies indicate multiple operating modes, which can add setup decisions depending on how you want to use the unit.
  • Built-in temperature is included, but no other accessory or mounting hardware details are provided in the product data.

Suggested Comparisons

  • Transom-mount transducers
  • Down imaging transducers
  • CHIRP sonar transducers
  • Temperature-sensing transducers

Suggested Accessories

  • Transom mount hardware
  • Transducer mounting accessories
  • Marine cable management accessories
  • Fish finder display accessories

Frequently Asked Questions

What type of mount is this transducer designed for?

It is a transom mount transducer.

What sonar features are listed for the XM 9 MDI T?

The product lists MEGA Down Imaging and Digital CHIRP Dual Spectrum.

What frequencies and beam angles are provided in the product data?

The listed frequencies are 455 kHz, 800 kHz, and 1.2 MHz, with 25/42 degree and 45/75 degree beam angles.

Does this transducer include temperature sensing?

Yes. The product description states that it includes built-in temperature.

Is this transducer compatible with HELIX units?

The title identifies it as a HELIX MEGA DI transducer, but the provided data does not list specific compatibility details beyond that.