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Hardware > Tools > Measuring Tools & Sensors > TransducersHumminbirdSold by Humminbird Johnson Outdoors
XM 9 20 MSI T - Transom HELIX MEGA SI MEGA DI Transducer
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$399.99
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SKU: 1093529
Overview
Designed for transom mounting, this Humminbird transducer is built to support compatible HELIX systems with MEGA SI, MEGA DI, and DualBeam PLUS sonar capabilities. It includes built-in temperature and operates across 200/83/455/800 kHz and 1.2 MHz, giving anglers multiple sonar options for interpreting what’s below the boat. The listed beam angles of 20/60/86/55 degrees provide a range of coverage suited to different scanning needs on the water. It is a specialized choice for users who want a transducer configured for side-imaging and down-imaging applications in a transom-mount setup.
Why Hunters Choose the Humminbird
Transom-mount Design
For straightforward installation at the
Supports Mega
SI and MEGA DI imaging
Includes Dualbeam
PLUS sonar capability
Covers Multiple
Beam angles: 20, 60, 86,
Operates Across
200, 83, 455, 800 kHz
Key Features
- Transom-mount transducer for Humminbird HELIX MEGA SI and MEGA DI systems.
- Supports MEGA SI, MEGA DI, and DualBeam PLUS sonar modes.
- Beam angles listed at 20, 60, 86, and 55 degrees.
- Operates at 200, 83, 455, 800 kHz, and 1.2 MHz.
- Includes built-in temperature sensing.
- Retailer-listed as the XM 9 20 MSI T transducer.
Best Used For
- Boat owners needing a transom-mounted transducer for compatible Humminbird HELIX setups
- Anglers wanting MEGA SI and MEGA DI sonar support with DualBeam PLUS capability
- Users who need built-in temperature reading alongside multiple sonar frequencies
- Fishermen configuring a system around 20/60/86/55 degree coverage options
Specifications
| Beam Angles | 20/60/86/55 degrees |
|---|---|
| Built In Temperature | Included |
| Dual Beam Plus | Yes |
| Frequencies | 200/83/455/800 kHz and 1.2 MHz |
| Long Description | Transom Mount, MEGA SI, MEGA DI, DualBeam PLUS, 20/60/86/55 degrees, 200/83/455/800 kHz and 1.2 MHz, Includes built-in temperature | Humminbird XM 9 20 MSI T - Transom HELIX MEGA SI MEGA DI Transducer |
| Mega Di | Yes |
| Mega Si | Yes |
| Mount Type | Transom Mount |
| Short Description | Transom Mount, MEGA SI, MEGA DI, DualBeam PLUS, 20/60/86/55 degrees, 200/83/455/800 kHz and 1.2 MHz, Includes built-in temperature |
Pros
- Transom-mount design for straightforward installation at the stern.
- Supports MEGA SI and MEGA DI imaging functions.
- Includes DualBeam PLUS sonar capability.
- Covers multiple beam angles: 20, 60, 86, and 55 degrees.
- Operates across 200, 83, 455, 800 kHz and 1.2 MHz frequencies.
- Built-in temperature sensor adds an extra data point on the water.
Considerations & Trade-offs
- Transom-mount installation is required, so this transducer is suited to boats where that mounting position is appropriate.
- The unit is built around MEGA SI, MEGA DI, and DualBeam PLUS sonar support, so it is intended for compatible Humminbird HELIX systems rather than universal use.
- It operates across multiple beam angles and frequencies, which adds flexibility but also means setup and interpretation may be more involved than with a simpler transducer.
- Built-in temperature is included, but no other accessory or installation hardware details are provided in the product data.
Suggested Comparisons
- Transom-mount transducers
- Side imaging transducers
- Down imaging transducers
- Dual-beam sonar transducers
Suggested Accessories
- Transducer mounting hardware
- Sonar display unit
- Marine cable management accessories
- Temperature sensor accessories
Frequently Asked Questions
What type of mount does the XM 9 20 MSI T use?
It is a transom mount transducer.
Which sonar technologies are listed for this transducer?
The provided data lists MEGA SI, MEGA DI, and DualBeam PLUS.
What frequencies and beam angles are specified?
The product data lists 200/83/455/800 kHz and 1.2 MHz, with beam angles of 20/60/86/55 degrees.
Does this transducer include temperature sensing?
Yes. The description says it includes built-in temperature.
What product category does this belong to?
It is a Humminbird transducer, specifically the XM 9 20 MSI T - Transom HELIX MEGA SI MEGA DI Transducer.