XSONIC Airmar B275LH-W

The XSONIC Airmar B275LH-W through-hull bronze transducer is a 1 kW unit featuring Airmar’s dual-frequency CHIRP technology. Designed for depth sounding and water temperature measurement, it operates at 42–65 kHz (low frequency) and 150–250 kHz (high frequency). Supplied with a 10 m cable, it has two 9-pin connectors.

The XSONIC Airmar B275LH-W transducer has a nominal power output of 1 kW. It can reach a maximum depth of 914 m (3,000') in low frequency and 152 m (500') in high-frequency wide mode.

This CHIRP dual-frequency transducer covers a frequency range from 42 to 65 kHz for low frequencies and 150 to 250 kHz for high frequencies.

For low frequencies (42–65 kHz), the beam angle ranges from 25° to 16°. For high frequencies (150–250 kHz), the transducer uses a constant 25° beam (wide).

Yes, the XSONIC Airmar B275LH-W transducer is equipped with a water temperature sensor in addition to its depth detection function.

The XSONIC Airmar B275LH-W transducer weighs 7.3 kg (16 lb).

The transducer is supplied with a 10-metre (33 ft) cable.

CHIRP dual-frequency technology allows the transducer to transmit across a wide range of frequencies (low and high) for extended coverage. This results in sharper sonar images and improved fish detection, particularly thanks to the constant 25° wide beam at high frequency, which doubles the coverage under the boat compared to traditional narrow-beam transducers.

The B275LH-W bronze transducer is recommended only for fiberglass or wood hulls.

No, it is strongly advised against installing a bronze transducer on a metal hull, as this would cause electrolytic corrosion.

Yes, a high-performance fairing block is included and its installation is recommended, especially if the hull’s deadrise angle exceeds 10°. It directs the sonar beam downward and optimizes water flow under the transducer.

The high-performance fairing block included allows installation on hulls with a deadrise angle up to 20°.

For installation of the B275LH-W transducer, a 33 mm (1-5/16") hole is required for the transducer itself. A pilot hole of 3 mm (1/8") is first recommended.

Yes, applying a water-based antifouling paint is mandatory in saltwater. Airmar also certifies that applying the Foulfree coating does not result in any loss of performance for the transducer.

CHIRP transducers generate more heat than traditional transducers. The B275LH-W is a through-hull transducer of the "external" or "shaft" type, meaning it is installed entirely outside the hull, with its active face and sides submerged in water. It is critical to follow installation instructions to ensure adequate heat dissipation and prevent overheating. Never operate the transducer out of water.

For installation in a fiberglass sandwich hull, specific instructions must be followed. These instructions detail additional tools and materials required, such as hole saws and drills for the hull interior, a cylinder, wax, tape, and casting epoxy.

The XSONIC Airmar B275LH-W transducer is a hardware accessory compatible with Lowrance sonar systems. It features two 9-pin connectors, making it compatible with Navico-branded devices (Lowrance, Simrad, B&G) that use this type of CHIRP transducer connection.

No, the B275LH-W transducer is made of bronze and is specifically recommended for fiberglass or wooden hulls. It must not be installed on metal hulls due to the risk of electrolytic corrosion.

The XSONIC Airmar B275LH-W transducer provides depth and water temperature data. With its CHIRP dual-frequency technology and wide beam, it delivers detailed sonar images for fish detection and seabed mapping.

Yes, the high-performance fairing block included with the transducer is designed to direct water around the transducer to minimize drag. Its performance is excellent above 15 knots (18 MPH), making it suitable for boats capable of higher speeds.