Airmar R409-LWM CHIRP Thru-Hull Transducer
Best high-performance sonar for serious deep-water sport anglers.
Unlock superior underwater detail with the Airmar R409-LWM CHIRP Thru-Hull Transducer. Engineered for serious anglers, its ultra-wide beam and dual-frequency CHIRP technology deliver exceptional fish detection and bottom structure clarity. This transducer is built for performance across various hull types and deadrise angles, ensuring reliable operation in demanding conditions. With its robust construction and advanced Xducer ID technology, it offers seamless integration and deep-water capability for an enhanced boating and fishing experience.
$4199.95
Owner Satisfaction
4.6
/ 5
Category Rank
63
/ 330
#63 in Marine Electronics
Price vs Category Average
+434%
Above average
Hull Deadrise
025
/ ° to °
Who it's for
- Offshore anglers targeting deep-water species
- Captains needing wide-area coverage for scouting
- Serious tournament fishermen requiring precise target identification
Who should skip it
- Boat owners seeking a simple, DIY-friendly installation
- Casual weekend anglers on a limited budget
- Performance boaters prioritizing maximum speed and fuel efficiency
Performance breakdown
Deep-water penetration
Two kilowatts of power reach depths that leave standard transducers behind.
Target separation
CHIRP technology distinguishes individual fish from tight schools with surgical precision.
Coverage width
The ultra-wide beam scans significantly more water than traditional narrow-angle sensors.
Hull versatility
Adapts seamlessly to diverse hull materials and steep deadrise angles.
Structural durability
Rugged urethane housing withstands the harshest marine environments for years.
System integration
Xducer ID technology ensures immediate, error-free recognition by your marine display.
Key Specs
Hull Deadrise
0° to 25°
Power
2kW RMS
Maximum Depth
1219m (4000')
Low Frequency Bandwidth
40 to 60 kHz
Medium Frequency Bandwidth
80 to 130 kHz
Hull Type Compatibility
Fiberglass, Wood, Metal
Acoustic Window Material
Epoxy/Urethane
Beam Angle
40° (Low), 13° to 8° (Medium)
Features
- Ultra-wide beam for comprehensive coverage
- CHIRP technology for enhanced target separation
- Suitable for fiberglass, wood, and metal hulls
- Accommodates wide hull deadrise angles
- Exclusive Xducer ID technology
- High power output for deep water
- Durable urethane housing for longevity
What customers say
Serious anglers consistently praise the exceptional build quality and precision of this transducer's sonar imaging. It offers reliable performance in deep water, making it a professional grade investment. The clarity from its low and medium frequency bands enables superior target identification. While a significant financial commitment, users find the durability and consistent results justify the cost. This component provides absolute certainty for those prioritizing clear underwater views, proving its value through dependable performance and robust construction.
Know before you buy
The ultra-wide beam provides a significantly larger coverage area beneath your boat, allowing you to scan more water and detect fish or structure that might be missed by narrower beams.
Yes, this transducer is compatible with fiberglass, wood, and metal hulls. Its robust urethane housing is designed to handle the installation requirements of various boat materials.
The R409-LWM is rated for a maximum depth of 1,219 meters (4,000 feet). Its 2kW power output ensures strong signal penetration for deep-water fishing.
Xducer ID allows your compatible sonar display to automatically recognize the transducer and its specific parameters. This simplifies the setup process and ensures your fish finder is configured correctly for the hardware.
Yes, it is engineered to accommodate hull deadrise angles ranging from 0° to 25°. This flexibility makes it suitable for a wide variety of hull shapes and configurations.
Using both bands allows you to balance depth and detail. The low frequency (40-60 kHz) is ideal for deep-water penetration, while the medium frequency (80-130 kHz) provides superior target separation and clarity for shallower depths.
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$4200