Raymarine B175H Bronze Low Profile 1000W D/T Through Hull Transducer 20° Angle

Raymarine B175H Bronze Low Profile 1000W D/T Through Hull Transducer 20° Angle

Raymarine B175H Bronze Low Profile 1000W D/T Through Hull Transducer 20° Angle is high-performance, 1000W bronze through-hull transducer is specifically engineered for those who demand precision and clarity at speed.

As a "Low Profile" model, the B175H sits nearly flush against your hull, protruding less than 6mm (1/4”) outside the boat. This design significantly reduces drag and turbulence compared to traditional fairing-block installations, ensuring a cleaner sonar return and allowing your boat to sit safely on trailer rollers or bunks without risk of damage.

This specific 20° angled version is designed for boats with a hull deadrise of 16° to 24°. The internal ceramic element is factory-tilted to compensate for the slope of your hull, ensuring the sonar beam points straight down to the seabed for the most accurate depth readings and strongest echo returns.

Whether you are pinpointing fish holding tight to wrecks or looking for crisp target separation in bait schools, the B175H delivers the High-CHIRP performance required for elite-level coastal and offshore fishing.

Raymarine B175H Bronze Low Profile 1000W D/T Through Hull Transducer 20° Angle Key Features

• 1 kW High-CHIRP Performance: Delivers professional-grade power (1000 Watts) for deep-water penetration and incredible target detail.
• High-Frequency Precision: Operates across the 130kHz to 210kHz spectrum, providing a narrow beamwidth (10° to 6°)—perfect for isolating individual fish and fine bottom structure.
• 20° Tilted Element: Specifically calibrated for hulls with a 16° to 24° deadrise, eliminating the need for a bulky fairing block while maintaining a vertical sonar beam.
• Low-Profile Bronze Housing: Crafted from durable, marine-grade bronze for use on fiberglass or wood hulls. The sleek design minimises drag and improves performance at high cruising speeds.
• Depth & Temperature: Equipped with a fast-response water temperature sensor and depth sensing capabilities down to 304m (1,000ft).
• CHIRP Technology: Provides up to 80kHz of total bandwidth, resulting in superior resolution, better noise suppression, and the ability to distinguish between baitfish and game fish.

Technical Specifications

• • Material: Bronze (Suitable for Fiberglass or Wood hulls)
  • Power: 1000W (1kW)
  • Frequency: High CHIRP (130-210 kHz)
  • Beam Width: 10° to 6°
  • Maximum Depth: 304m (1,000ft)
  • Tilt Angle: 20° (For 16°-24° deadrise)
  • Installation: Through-hull (95mm / 3.75" hole)

Morgan Marine Advice: If you are unsure if your hull deadrise falls within the 16° to 24° range, or if you need assistance selecting the correct adapter cable for your Raymarine Axiom or CP series sonar module, please contact our team for expert guidance

Raymarine B175H Bronze Low Profile 1000W D/T Through Hull Transducer 20° Angle FAQs

What makes the B175H "High-Frequency" and why does it matter?

The ‘H’ in B175H stands for High Frequency. This transducer operates across the 130kHz to 210kHz range. In practical terms, this provides a narrower beamwidth (between 15° and 9°), which is absolutely superb for pinpointing fish holding tight to wrecks, reefs, and bottom structures. If you are looking for exceptional target separation of baitfish and schooling gamefish in shallower to mid-depth waters, this is the one for you.

Why do I need the 20° Tilted Element version?

This is one of the most important factors for your installation. The 20° tilt is designed specifically for boats with a hull deadrise (the V-angle of your hull) between 16° and 24°.
By having the ceramic element tilted inside the bronze housing, the sonar beam points straight down to the sea floor even though the transducer is mounted on a sloped part of your hull. This ensures you get the strongest possible echo returns and the most accurate depth readings.

Can I use this on any hull material?

The B175H features a marine-grade bronze housing. This is ideal for fibreglass (GRP) or wooden hulls.

Crucial Note: If you have an aluminium or steel hull, you must not use a bronze transducer, as it will cause galvanic corrosion. For metal hulls, please contact us for the Stainless Steel (SS175) equivalent.

How deep will the B175H reach?

As a 1kW (1000-watt) powerhouse, the B175H has significant "punch." While performance always depends on water conditions and salinity, you can expect clear bottom tracking and fish detection down to approximately 300 metres (1,000 feet).

What is the difference between the B175H and the B175HW?

It’s a common point of confusion! The B175H (this model) has a narrow beam for detail and depth. The B175HW (High Wide) has a constant 25° wide beam.

Choose the B175H if you want to see specific structure and fish at greater depths.

Choose the B175HW if you want maximum coverage in the upper water column (perfect for pelagic fishing).

Is it a "Low Profile" design?

Yes. Unlike traditional transducers that require a large fairing block (which can cause drag and affect boat handling), the B175H sits nearly flush with the hull. This "Low Profile" design results in less turbulence, allowing for much clearer sonar imagery at higher cruising speeds.

Does it provide temperature data?

Yes, the B175H is a D/T (Depth and Temperature) sensor. It includes a fast-response water temperature sensor, which is vital for anglers looking for thermal breaks and "fishy" water.

Which Raymarine sonar modules is this compatible with?

The B175H is a single-element CHIRP transducer. It is directly compatible with Raymarine’s professional sonar modules like the CP470 and CP570.

Top Tip: Depending on your setup, you may require a specific adapter cable (e.g., A80328) to connect to certain Axiom displays or modules. If you're unsure about your current cabling, give the Morgan Marine team a ring, and we’ll match it up for you.

What size hole do I need to drill?

For a standard installation in a fibreglass or wood hull, you will need a 95mm (3.75") hole saw. We always recommend professional installation to ensure a watertight seal and proper alignment of the "tilted" internal element.

Need more help?

If you’re still not sure if the 20° angle is right for your hull, or if you need to discuss a twin-transducer setup (pairing High and Low frequencies), the Morgan Marine team is here to help. Drop us a message or visit us at the chandlery!