The B&C DH450 – 1″ Compact Compression Driver with HLX™ Phase Plug

The DH450 from B&C Speakers is a compact 1-inch exit high-frequency compression driver designed for space-sensitive professional audio systems. It delivers high output, low distortion, and reliable performance using a neodymium motor and B&C’s HLX™ phase plug design.

This driver is built for two-way systems, coaxial configurations, and portable enclosures where space and weight constraints don’t allow compromise on clarity or efficiency.

Manufactured in Italy, the DH450 uses proven materials, tight tolerances, and practical mounting features that simplify integration into OEM and custom loudspeaker systems.

HLX™ Phase Plug for Controlled HF Reproduction

The DH450 features B&C’s patented HLX™ helical phase plug. Unlike standard radial phase plugs, the HLX™ design uses twisted, equal-length channels to minimize path length differences across the diaphragm surface.

The result is reduced phase cancellation, lower intermodulation distortion, and smoother high-frequency output. This enables more predictable performance when paired with horns and waveguides, even in wide-dispersion or coaxial configurations.

The HLX™ plug also allows for lower crossover points. The DH450 is optimized for use above 1 kHz, making it compatible with larger low-frequency transducers without forcing an overly steep slope or unnecessary EQ correction.

Neodymium Motor with Efficient Heat Management

Powering the DH450 is a lightweight neodymium magnet assembly. The motor is compact, weighing just 0.53 kg, yet capable of maintaining stable magnetic flux during extended use.

The voice coil diameter is 44 mm (1.7 in) and uses an aluminum former. It’s engineered to dissipate heat efficiently, preventing power compression and keeping performance consistent over time.

The driver is rated for 20W AES power handling and 40W program power. While this is modest compared to large-format drivers, the DH450 is designed for systems where controlled dispersion and speech clarity matter more than extreme SPL.

In install applications or distributed systems, the neodymium motor keeps cabinet weight low while still meeting the thermal and mechanical demands of long-term operation.

High Sensitivity and Defined Frequency Response

The DH450 delivers 109 dB sensitivity (1W/1m), ensuring high acoustic output without requiring excessive amplifier power. Its frequency range of 1 kHz to 18 kHz covers the entire upper midrange and treble range used in most professional reinforcement applications.

This makes it suitable for applications including vocal PA, fills, floor monitors, column arrays, and front-loaded point source systems.

The HT polymer diaphragm offers a balance between internal damping and stiffness. This material helps control resonance modes and prevents harshness at high output levels. The suspension is designed to remain stable under excursion without limiting upper frequency extension.

Small Footprint, Big Integration Flexibility

At just 69 mm in diameter and 48 mm in depth, the DH450 is one of the smallest 1-inch exit drivers in its class. It mounts via two M5 threaded holes on a 57 mm bolt circle, making it compatible with many standard horns and throat adapters.

This compact footprint is particularly useful for tight installations, lightweight portable speaker systems, and coaxial configurations where space behind the baffle is limited.

Its lightweight structure also makes it ideal for flown systems, mobile stages, or fixed installations where weight and structural load are critical concerns.

The bolt pattern is designed for easy horn integration with minimal mechanical adaptation. This keeps manufacturing processes simple for OEMs and reduces turnaround time during cabinet design.

Reliable Construction for Demanding Use

Every part of the DH450 is engineered for durability and consistency. The diaphragm and suspension are selected for fatigue resistance, while the magnet structure and venting system are designed to manage heat under normal and continuous usage.

The voice coil former and gap are manufactured with tight tolerances to maintain stability under load and to prevent performance drift over time.

Because it’s built by B&C in Italy, the DH450 adheres to the same manufacturing quality controls as the brand’s flagship compression drivers. This means long-term reliability and repeatable performance across large production batches.

Specifications

• Throat Diameter: 25 mm (1 in)
• Voice Coil Diameter: 44 mm (1.7 in)
• Diaphragm Material: HT Polymer
• Magnet Type: Neodymium
• Nominal Impedance: 8 ohms
• AES Power Handling: 20 W
• Program Power Handling: 40 W
• Sensitivity: 109 dB (1W/1m)
• Frequency Range: 1 kHz – 18 kHz
• Recommended Crossover: ≥1 kHz (12 dB/oct)
• Overall Diameter: 69 mm
• Depth: 48 mm
• Weight: 0.53 kg
• Made in: Italy

Conclusion

The DH450 is built for designers who need a professional-grade 1-inch compression driver that fits into compact enclosures without sacrificing performance.

It’s efficient, light, and easy to integrate, while its HLX™ phase plug and neodymium motor provide the kind of fidelity and control typically reserved for larger, more expensive drivers.

From compact PA tops to coaxial stage monitors and fixed installs, the DH450 provides solid HF performance, consistent manufacturing, and a form factor that makes it easy to spec.

If you’re building or upgrading a space-sensitive system and need clarity, efficiency, and reliability—DH450 is the right driver.

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About B&C Speakers S.r.L.

B&C Speakers products are built in Bagno a Ripoli (Florence), Italy., ensuring high quality products to suite your speaker building requirements. Their 10,500 square meter facility incorporates highly sophisticated automation and quality control. Over the years they become one of the world leaders in the Professional Audio market, a brand recognized everywhere as a premium product that offers excellent value to the consumer.