Raymarine B175M Bronze Low Profile 1000W D/T Through Hull Transducer 12° Angle

Raymarine B175M Bronze Low Profile 1000W D/T Through Hull Transducer 12° Angle

Raymarine B175M Bronze Low Profile 1000W D/T Through Hull Transducer 12° Angle is a powerhouse 1kW through-hull transducer designed for serious offshore and coastal anglers. At Morgan Marine, we recommend the B175M for those seeking the perfect balance between deep-water reach and high-definition target separation.

The B175M is a low-profile, bronze through-hull transducer that utilises Medium-band CHIRP technology. By sweeping across a frequency range of 85kHz to 135kHz, it provides incredibly clear images of fish targets and bottom structure at medium depths—up to approximately 450 metres (1,500 feet).

The "12° Angle" refers to the internally tilted ceramic element. This clever design allows the transducer to be mounted almost flush to the hull, reducing drag and improving performance at speed, while the internal tilt compensates for your boat’s deadrise. This ensures the sonar beam is directed straight down for the most accurate echo returns.

Raymarine B175M Bronze Low Profile 1000W D/T Through Hull Transducer 12° Angle Key Features

• 1kW Power Rating: Provides the high-energy output needed to punch through the water column for superior deep-water performance and clear bottom tracking.
• Medium Frequency CHIRP (85–135kHz): The "sweet spot" for many UK anglers, offering a wide 16° to 24° beamwidth that delivers excellent coverage under the boat while maintaining crisp target resolution.
• Tilted Element Design: The 12° fixed tilt compensates for your hull’s deadrise, allowing for a low-profile installation that sits nearly flush to the hull—perfect for trailed boats or high-speed vessels.
• Built-in Sensors: Provides highly accurate depth and fast-response water temperature data directly to your Raymarine MFD.
• Bronze Construction: Robust and durable, this housing is designed for use on fibreglass or wood hulls.
• Superior Target Separation: Experience the clarity of CHIRP technology, allowing you to distinguish between individual baitfish, game fish, and complex underwater structures.

Technical Specifications

• • Frequency: 85-135 kHz (Medium CHIRP)
  • Beamwidth: 16° to 24°
  • Maximum Depth: 457m (1,500ft)
  • Hull Material: Fibreglass or Wood
  • Deadrise Compatibility: 8° to 15°
  • Cable Length: 10m (33ft)

Compatibility: Designed for use with Raymarine CP470 / CP570 sonar modules and Axiom series displays (requires appropriate adapter cable depending on your setup—please contact us at Morgan Marine if you need advice on connectivity).

Dealer Note: To ensure you get the best performance from your Raymarine electronics, correct transducer selection is vital. If you are unsure if your hull deadrise falls within the 8° to 15° range, please get in touch with our team at Brightlingsea for expert guidance.

Raymarine B175M Bronze Low Profile 1000W D/T Through Hull Transducer 12° Angle FAQs

What does the "12° Angle" (Tilted Element) actually mean?

This is the most critical part of your purchase! Most boat hulls are V-shaped, meaning the bottom isn't flat. If you installed a standard flush transducer, the sonar beam would point off to the side rather than straight down.

The B175M 12° version has the internal ceramic element permanently tilted at a 12-degree angle. This is designed for boats with a hull deadrise angle of 8° to 15°. When installed, the housing sits flush with your hull, but the beam shoots straight to the seabed.

Why should I choose the "Medium" (M) frequency over Low (L) or High (H)?

The 'M' in B175M stands for Medium CHIRP (85–135 kHz). It is widely considered the "sweet spot" for UK coastal and offshore fishing.

• • Depth: It reaches deeper than the High-frequency version (up to 457m / 1,500ft).
  • Detail: It provides much better target separation than the Low-frequency version.

Best For: Anglers fishing in 60m to 250m of water who want to see individual fish icons and clear bottom structure.

What are the benefits of the "Low Profile" bronze housing?

Unlike traditional "block" transducers that require a large fairing block, the B175M is a "Flushing" or "Low Profile" thru-hull. It extends less than 7mm outside the hull.

• • Speed: It creates almost no drag, making it perfect for fast-planing hulls and RIBs.
  • Trailer-Friendly: Because it sits nearly flush, there is no risk of damaging it when loading the boat onto a trailer or rollers.

Is this transducer compatible with my Raymarine display?

The B175M is designed for Raymarine’s premium sonar modules and chartplotters. It is directly compatible with:

• • Axiom Pro / Axiom 2 Pro (RVM or RVX models)
  • CP470 / CP570 Professional Sonar Modules

Note: You may require a specific adapter cable (e.g., A80328) depending on your specific display model. Please contact us at Morgan Marine with your display's serial number if you're unsure!

Can I use this in a "Pair" configuration?

Yes. While the B175M is a powerhouse on its own, many of our customers eventually pair it with a B175L (Low) to get incredible deep-water performance or a B175H (High) for ultra-clear shallow-water detail. To do this, you would use a Raymarine Y-cable (A012146) to feed both signals into a single sonar port.

Does it measure temperature as well as depth?

Yes, the "D/T" in the description stands for Depth and Temperature. The B175M features a fast-response water temperature sensor, which is vital for finding thermal breaks where predatory fish often congregate.

What material is my hull? (Bronze vs. Stainless Steel)

This is a Bronze transducer.

• • Use it if: You have a Fibreglass (GRP) or Wood hull.
  • Do NOT use it if: You have an Aluminium or Steel hull. Using bronze on metal hulls can cause galvanic corrosion, which can damage your boat. (If you have a metal hull, ask us about the Stainless Steel version).

How difficult is the installation?

Because this is a "Thru-Hull" transducer, a hole must be drilled through the hull (approx. 95mm / 3.75"). While many DIY boat owners feel comfortable with this, we always recommend professional installation to ensure the hull is properly sealed and the 12° orientation is aligned correctly (pointing toward the keel).