Airmar B275LHW through-hull bronze CHIRP 1 kW fishfinder

The Airmar B275LHW transducer is a 1 kW CHIRP through-hull transducer designed for sport fishing and navigation. It delivers detailed images of the seabed, structures, and fish using low frequencies (Low CHIRP) and wide-beam high frequencies (High-Wide CHIRP).

The B275LHW transducer operates on two CHIRP frequency ranges:

Low frequency (Low CHIRP): 40-60 kHz, providing excellent deep-water penetration and target detection.High-frequency wide beam (High-Wide CHIRP): 150-250 kHz, delivering extended coverage and precise detail of fish and structures in the upper water column.

The Airmar B275LHW transducer has a transmit power of 1 kW (1000 watts RMS). This high power ensures excellent performance, particularly for deep-water detection.

This depth sounder provides precise data on water depth, water temperature, fish detection, and underwater structure identification thanks to its advanced CHIRP technology.

CHIRP (Compressed High-Intensity Radiated Pulse) technology enables the fishfinder to send a continuous sweep of frequencies rather than a single fixed frequency. This results in significantly improved resolution and target separation, providing clearer and more detailed images of fish and structures, even in deep water.

The constant 25° wide-beam (High-Wide) from 150–250 kHz provides extended coverage beneath the boat. This allows you to see a larger area of the seabed and detect more fish and bait in the upper water column, which is especially useful for sport fishing.

Yes, absolutely. With its low-frequency range (Low CHIRP 40-60 kHz) and 1 kW power output, the B275LHW transducer is particularly effective for detecting fish and structures in deep water, providing excellent penetration and clear returns.

The Airmar B275LHW transducer housing is made of bronze, providing high robustness and durability in a marine environment.

Yes, the Airmar B275LHW transducer includes a water temperature sensor, providing this data directly to your compatible device.

The Airmar B275LHW transducer is a through-hull type. This means it is installed by drilling a hole in the boat's hull and securing it from the outside, with the transducer face in direct contact with the water.

The B275LHW transducer, with its bronze housing, is primarily designed for installation on fiberglass and wooden hulls. For aluminum hulls, transducers with stainless steel or plastic housings are generally recommended to avoid galvanic corrosion.

Yes, as it is a through-hull transducer, installing the B275LHW requires drilling a hole in the boat’s hull so the transducer can be mounted and the active face is submerged and in direct contact with the water.

Yes, the Airmar B275LHW transducer is generally supplied with a fairing block. This fairing block is crucial for optimizing the transducer’s performance, as it ensures a laminar water flow across the transducer face, reducing turbulence and improving signal quality, especially at high speeds.

The Airmar B275LHW transducer is typically supplied with a standard 10-meter (approximately 33-foot) cable to allow flexible installation on most boats.

For optimal installation, it is essential to choose a hull location where water flow is cleanest and least turbulent. The transducer shoe must be properly aligned with the waterline and the boat’s direction of travel. It is recommended to carefully follow the manufacturer’s installation instructions and, if necessary, consult a professional.

The B275LHW transducer is compatible with Garmin chartplotters and sounder modules equipped with a CHIRP 12-pin transducer port. This includes series such as GPSMAP (e.g., 7x2xs, 9x2xs, 10x2xsv, 12x2xsv, 74xx/76xx, 84xx/86xx), ECHOMAP Ultra, ECHOMAP UHD, and the GSD 25 sounder module.

No, the Airmar B275LHW transducer is equipped with a 12-pin connector specific to Garmin. It is not directly compatible with systems from other brands without an adapter or specific rewiring, which is not recommended and could void the warranty.

Yes, the B275LHW transducer is fully compatible with external Garmin fishfinder modules such as the GSD 25, which support CHIRP 1 kW 12-pin transducers. This allows adding advanced fishfinding capabilities to compatible navigation systems.

Yes, the B275LHW through-hull transducer is suitable for long-keel or displacement sailboats. Its through-hull installation and the use of a fairing block keep the transducer face in clean water flow, even on these hull types, ensuring optimal performance.

Yes, the B275LHW is designed to operate efficiently on fast powerboats. Installation with the included fairing block is critical to minimize turbulence and maintain a clear signal even at high speeds, though the depth sounder typically performs best at moderate speeds.