Garmin Airmar R109LHW 2kW 38-75kHz & 150-250kHz Thru-Hull Transducer
Garmin Airmar R109LHW 2kW 38-75kHz & 150-250kHz Thru-Hull Transducer — Product description
Unlock Superior Sonar Performance with Dual-Frequency Precision
Imagine gliding through deep ocean trenches one moment and pinpointing structure in shallow bays the next—all with a single, powerful transducer. The Airmar R109LHW delivers that versatility through its innovative dual-band design, blending robust low-frequency penetration for extreme depths with high-frequency clarity for intricate details. Anglers, cruisers, and commercial operators alike rely on this thru-hull powerhouse to elevate their on-water experience, turning guesswork into confidence-boosting reads on fish location, bottom composition, and underwater obstacles.
Crafted for vessels demanding professional-grade sonar without compromise, it packs 2kW of raw power into a compact plastic housing that's easier to install than bulkier metal alternatives. Whether you're chasing trophy species offshore or navigating tricky inlets, this transducer adapts seamlessly to your boating style.
Standout Features for Demanding Marine Environments
- Dual Operating Bands: Low band (38-75kHz) excels in depths up to 8,000 feet, ideal for bluewater expeditions; high wide band (150-250kHz) shines in shallows under 500 feet with exceptional resolution.
- Optimized Beam Patterns: Low-frequency beam spreads at 9x23 degrees for broad coverage, while high-frequency maintains a constant 25-degree beam for focused imaging—perfect for separating targets in cluttered waters.
- Versatile Mounting: Thru-hull design suits hull deadrises from 0 to 25 degrees, ensuring clean water flow and minimal distortion on planing hulls or displacement boats.
- Bare Wire Flexibility: Customizable cabling lets you integrate precisely with your existing electronics setup, reducing clutter and signal loss.
- Durable Construction: Impact-resistant plastic hull withstands harsh marine conditions, from saltwater corrosion to repeated trailering stresses.
Deep Water Dominance Meets Shallow Water Sharpness
In low-frequency mode, expect unmatched bottom tracking at extreme ranges, revealing drop-offs, wrecks, and schools that single-band units miss. Switch to high-wide, and you'll see hyper-detailed images of bait balls, ledges, and vegetation—crucial for jigging or trolling in 50-300 foot zones. Real-world users report cleaner separations between thermoclines and game fish, thanks to the transducer's ability to handle variable sea states without excessive noise.
For larger sportfishers over 40 feet, this 2kW unit drives stronger signals through thicker hulls compared to 1kW options, minimizing power loss. It's a game-changer for live-lining tuna or swordfishing, where every foot of depth counts.
Streamlined Setup for Lasting Reliability
Thru-hull mounting keeps the element submerged in undisturbed water, delivering the purest signals possible. The slightly smaller footprint simplifies retrofits on crowded bilges, and the included guidelines ensure proper fairing and sealing to prevent leaks or cavitation. Pro tip: Pair with a dedicated fairing block for deadrises beyond 12 degrees to optimize beam projection and avoid air entrainment during high-speed runs.
Once wired to compatible multifunction displays, calibration is straightforward—adjust gain and range to match your local waters for peak performance.
Ideal Applications Across Boating Scenarios
From coastal charters targeting snapper reefs to offshore pelagics like marlin, this transducer supports it all. Tournament anglers love the shallow-water prowess for prefish scouting, while yacht owners appreciate the deep-water reliability for safe navigation. Even surveyors use its precision for mapping uncharted seabeds.
Frequently Asked Questions
What frequency ranges does the Airmar R109LHW support?
It features a low-frequency band of 38-75kHz for deep water and a high wide band of 150-250kHz for shallow water applications.
What is the maximum depth capability?
This transducer performs reliably up to 8,000 feet in low-frequency mode, making it suitable for deep-sea fishing and exploration.
What type of mounting is required?
It's a thru-hull mount, designed for installation through the boat's hull with compatibility for 0 to 25-degree deadrises.
What are the beamwidth specifications?
Low frequency offers a 9x23-degree beam for wide coverage; high frequency provides a constant 25-degree beam for detailed imaging.
What power rating does it have?
Rated at 2kW, it delivers strong signal output for larger vessels and challenging conditions.
What material is the housing made from?
The durable plastic housing resists corrosion and impacts, ideal for saltwater environments.
Is it suitable for high-speed boating?
Yes, with proper fairing, it maintains clear readings at planing speeds by minimizing turbulence.
What wiring configuration is provided?
It comes as a bare wire transducer, allowing custom integration with your electronics for optimal signal quality.
Airmar R109LHW 2kW 38-75kHz & 150-250kHz Thru-Hull Transducer
This plastic thru-hull mount transducer uses the low frequencies for deep water performance and high wide frequencies for shallow water performance.
A 2 kW in a slightly smaller package, this bare wire transducer has a depth of 8,000 feet; an operating frequency of 38 to 75 kHz and 150 to 250 kHz; a beamwidth of 9x23 degrees or a constant 25 degrees; and a 0 to 25 degree deadrise.
Transducer kit comes with installation instructions. Follow the instructions carefully to avoid damaging your boat.
We love outdoor activities and know that having the best equipment is essential for any new adventure. Our selected collection focuses on top brands from the marine, leisure and outdoor markets...
SKU: NVN-65540
MPN: 010-12182-20
UPC: 753759123567
Technical specifications
| Brand | Garmin |
| Model | Garmin Airmar R109LHW 2kW 38-75kHz & 150-250kHz Thru-Hull Transducer |
| SKU / MFR# | 65540 |
Set product metafields under specs.* to populate this table.
Frequently asked questions
No questions yet. Got one? Drop us a line.
