Airmar Transducers

Airmar B258 1kW Bronze D/T Thru Hull - Raymarine A Series

Brand: Airmar
Part Number: B258-RAYA

Sport fishermen get excellent 1 kW performance with the moderately-priced B258. Its economical, four-ceramic-element construction puts out a narrow beam for good deep-water capability with very good target and bottom definition.

The B258 is 25 times more sensitive than a single-element 50/200 kHz transducer. This innovative 1 kW transducer makes 600 W fishfinders perform like their more powerful big brothers—especially at 50 kHz. How does it do it? The B258 uses Airmar’s new and unique ceramic-element construction. The resulting narrow beams will clearly distinguish individual fish and bottom fish from their habitat at depths down to 670 m (2,200’).


  • Entry-level, 1 kW thru-hull, Bronze
  • 50/200 kHz
  • Cone: 14° x 23° / 3° x 5°
  • 1 kW RMS
  • Maximum Depth Range:
    • 50 kHz—441m to 647m
    • (1,500’ to 2,200’)
    • 200 kHz—206m to 294m
    • (700’ to 1,000’)
  • Depth and new fast-response water-temperature sensor
  • Recommended for sport fishing boats above 9 m (30’) and small to mid-size commercial fishing boats
  • Four 50/200 kHz ceramics as compared to one ceramic in 600 W units
  • Provides greater surface area resulting in better sensitivity
  • Compatible with single-transmission line sounders
  • Usable Shaft Length: ~ 121 mm (4.75”)
  • High-Performance Fairing included

A male connector used on the Raymarine A-series, DSM25 and a/c/e-series.