Airmar B785C-M Transducer CHIRP Thru-Hull 600W

Overview

Who This Is For: You run a boat where a thru-hull transducer makes sense, and you want reliable depth and temperature readings without overcomplicating your electronics. This bronze transducer is built for anglers who fish mid-range depths and want a proven, compact solution that integrates with CHIRP-capable fish finders.

Product Summary: The B785C-M is a thru-hull bronze transducer with a fairing block that delivers 600W of sonar power across the medium frequency band (80–130 kHz). You get fast-response depth and water temperature sensing in a package that's the same physical size as Airmar's B744V, making it an easy swap or retrofit on existing installations. The medium frequency range gives you the balance most serious anglers need—good coverage from shallow structure to deeper water without sacrificing detail.

Key Features

• Thru-Hull Bronze Construction with Fairing Block — protects the transducer from drag and corrosion while mounted through your hull — you get clean sonar performance without the noise and turbulence of a transom-mount.
• 600W Power Output — delivers strong, clear returns in a wide range of water conditions — more power means better target separation and detection of subtle structure, especially in deeper or murkier water.
• Medium Frequency CHIRP (80–130 kHz) — sweeps across a defined frequency range to eliminate interference and improve resolution — you'll pick up more fish and structure detail than single-frequency sonar, with less false readings.
• Fast-Response Water Temperature Sensor — reads temperature quickly and accurately — critical for finding the thermocline and matching seasonal patterns when targeting species like walleye and stripers.
• Compact Size Matching B744V Footprint — fits existing B744V mounting locations — simplifies installation if you're upgrading or replacing an older transducer.

Specs & What's Included

Compatibility: This transducer works with any fish finder that supports CHIRP sonar in the medium frequency band (80–130 kHz) and accepts a thru-hull bronze transducer. Confirm your head unit supports CHIRP before ordering. Not sure if this works with your setup? Call or text us at (833) 831-4077 — we'll tell you straight.

In the Box: B785C-M transducer with fairing block and bare wire cable. You'll need to connect the cable to your fish finder control head separately.