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I offer a FREE Tuition and FREE service where I fine tune the unit once the transducer has been installed.


For a competitive rate I can professionally INSTALL the transducer.




Call Darren Buttigieg to arrange pick up or questions on 0407090494




Pick up available from Keilor or Safety Beach or happy to post for a small fee...

If you do not find the transducer your looking for please notify me for a price.


The R509LHW - 2-3 kW >Broadband CHIRP Transducer is the Biggest and Baddest! Want to increase your catch? Want to detect ground Fish holding tight to the bottom in deep water? Want to mark bait Fish as closely-spaced, individual fish? Then Airmar’s R509 connected to a Simrad NSS or  multifunction display and S5100 CHIRP Sounder Module is the answer.


Chirp Transducers - Deeper Broader Clearer GAME CHANGING TECHNOLOGY!


Airmar’s >Broadband R509LH was formerly known as an R209LH and can operate at ANY Frequency between 28 kHz to 60 kHz and 150 kHz to 250 kHz. Adjusting the Frequency allows you to change the R509LH's beamwidth and depth capabilities. 

If you are tuna or marlin fishing in deep blue water, the wider, high Frequency beam in addition to providing vast bottom coverage and precise Fish detection in the upper water column that can sometimes go unseen with our narrow Beam transducers, but more importantly show you what is around your vessel, including bait which may attract game Fish. With the 509LH-W, you choose the Frequency for your fishing.



  • Precise separation between bait Fish & game fish
  • 2-3KW Equivalent Output Power
  • Low Frequency 24 Elements 28-60KHz 23-9° Beamwidth
  • High Frequency 1 Element 150-250KHz 25° Beamwidth
  • Constant Wide 25° Beamwidth with High CHIRP
  • 2400m Range with Low CHIRP (S5100 module required)
  • Ability to find targets within the noise(snow) on the display
  • Includes Water temperature Sensor
  • Transducer Cable Length: 10m
  • Suitable for boats over 8m


More Energy on Target = Better Fish Detection


Traditional fishfinders,

transmit pulses at a single frequency (such as 50 kHz and 200 kHz) and this pulse is often referred to as a “tone burst”. These pulses can be of very high power but are typically of very short duration and this limits the energy that can be transmitted into the water.  With tone burst fishfinders there is always the trade-off between pulse length and target resolution. For example, if a fishfinder transmits a pulse that is 500 microseconds in duration, it has a pulse length of 0. 7 m (2. 4’). With a tone burst, no targets can be resolved that are closer to one another than the pulse length. So fish less than 0. 7 m (2. 4’) apart will appear as a single large mass, and fish less than 0. 7 m (2. 4’) from the bottom will appear attached to the sea bed and will be difficult or impossible to detect. See graphic illustration above. Longer pulse lengths at 50 kHz are typically used to put more energy into the water to improve deep-water detection but doubling the pulse length reduces target discrimination by half thereby compromising resolution and detail. There is no ‘free lunch”



With CHIRP fishfinders,

there is no trade-off between pulse length and target resolution. While CHIRP fishfinders may output less peak power than a conventional fishfinder, what really matters is the energy put into the water with each pulse. Wide band, frequency modulated pulses (130-210 kHz, for example) can be very long in duration and put 10-50 times more energy into the water.  Unsurpassed target detection and resolution is achieved with digital signal processing using pattern matching techniques. With CHIRP fishfinders, the ability to determine the separation between fish and between fish and bottom can be a matter of inches as compared to several feet with traditional fishfinders. Closely grouped fish can now be shown as distinct targets instead of a single mass and show fish close to the bottom rather than being hidden. See graphic illustration. It is well known that different fish species and fish sizes return stronger echoes as certain frequencies. With traditional fishfinders operating at fixed frequencies(50k Hz and 200 kHz), fish echoes may be weak or not detected at all. Since CHIRP fishfinders transmit pulses over wide frequency bands, this maximises fish detection capability


Country of ManufactureUSA
Physical Dimensions587mmL x 170mmW x 106mmH
Transducer Cable Length10m
Frequency (KHz) & Beam Angle (°)High Chirp 130-210KHz 15°/9°
Transmit Power2-3kW
Mounting OptionsThru-Hull
Chirp SonarYes
Down Imaging (Transducer Dependant)None
Sonar Useable Depth (T/D & Frequency Dependant)500m+ with 2kW T/Ducer
Side Imaging (Transducer Dependant)None


R509LHW 2-3KW Xsonic Chirp Transducer for all Sounder models

$7,480.00 Regular Price
$6,899.00Sale Price

    Contact Us Directly to purchase:

    Darren Buttigieg


    Local Phone: 0407090494

    International Phone: +61407090494

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