The B&C DH350 – 1″ Ultra-Compact Neodymium Compression Driver with HLX™ Phase Plug
The DH350 from B&C Speakers is a high-performance 1-inch exit compression driver designed for tight-space, high-efficiency sound systems. With a compact profile, low mass, and B&C’s patented HLX™ phase plug, the DH350 delivers smooth high-frequency reproduction, low distortion, and exceptional integration flexibility for coaxial designs, portable PA systems, and compact two-way enclosures.
Built in Italy to B&C’s rigorous standards, the DH350 is optimized for systems that demand reliable output, low weight, and precision in small-format packages.
HLX™ Helical Phase Plug for Smoother Response
The DH350 features B&C’s HLX™ helical phase plug—a twisted-channel design that equalizes the acoustic path lengths from the diaphragm to the throat.
This structure helps reduce phase-related cancellations and intermodulation distortion while improving high-frequency linearity and off-axis consistency. It allows for clean reproduction from 1 kHz to 17 kHz, with minimal breakup and improved transient response compared to traditional phase plug designs.
By enabling a lower recommended crossover point of 1 kHz (12 dB/oct), the HLX™ phase plug offers system designers more flexibility when pairing with larger mid or LF drivers, especially in two-way and coaxial setups.
Neodymium Motor for Lightweight, Efficient Output
At the heart of the DH350 is a compact neodymium magnet structure, which offers strong magnetic flux with minimal size and weight.
The 36 mm (1.4 in) aluminum voice coil is wound on a vented former to improve thermal management and extend lifespan during high-duty cycles. The motor is tuned to deliver consistent performance across its full frequency range without introducing compression artifacts or distortion under load.
With 15W AES power handling and 30W program power, the DH350 is well-suited for high-efficiency systems where SPL, clarity, and system weight are all critical. Its compact dimensions and reduced thermal mass mean faster thermal recovery and more consistent performance during extended operation.
Tight Dispersion and High Sensitivity
The DH350 delivers 108 dB sensitivity (1W/1m)—impressive for a driver of this size and power class. It produces a controlled and defined high-frequency output that integrates well with small-format waveguides and horns.
The HT polymer diaphragm is optimized for stiffness and damping, producing clean HF response without harsh resonance peaks. This makes the DH350 suitable for high-intelligibility applications like speech reinforcement, vocal-forward music playback, or front-fill boxes in larger systems.
Its frequency range of 1 kHz to 17 kHz ensures it captures all critical vocal and instrument detail without sacrificing smoothness or control at the top end.
Minimal Footprint for Space-Critical Designs
The DH350 is designed for enclosures where space is at a premium. With an overall diameter of 48 mm, a maximum width of 64 mm, and a depth of just 46 mm, this driver can be installed in systems that can’t accommodate traditional large-format compression drivers.
It weighs only 0.25 kg, making it a strong choice for portable applications, flown systems, or compact wedges.
The driver is secured via two M5 threaded holes on a 53 mm bolt circle, compatible with many horn flare adapters or custom mounts. This simplifies cabinet integration and ensures mechanical stability under vibration or impact.
Whether you’re building a compact coaxial cabinet, floor monitor, or ultra-light top box, the DH350 offers the performance-to-size ratio system integrators need.
Rugged Construction for Professional Use
The DH350 is engineered to handle the demands of daily use in touring and fixed installation environments. The diaphragm material and surround are designed to withstand mechanical fatigue, while the motor assembly is fully sealed and corrosion-resistant.
Every detail—from gap venting to mounting hardware placement—is considered to ensure performance stays consistent, even under challenging conditions. The result is a driver that performs predictably show after show, install after install.
With its reliability, output, and size advantage, the DH350 has become a go-to option for speaker designers who need clean, high-frequency performance in space-restricted or weight-sensitive designs.
Specifications
- Throat Diameter: 25 mm (1 in)
- Voice Coil Diameter: 36 mm (1.4 in)
- Diaphragm Material: HT Polymer
- Magnet Type: Neodymium
- Nominal Impedance: 8 ohms
- AES Power Handling: 15 W
- Program Power Handling: 30 W
- Sensitivity: 108 dB (1W/1m)
- Frequency Range: 1 kHz – 17 kHz
- Recommended Crossover: ≥1 kHz (12 dB/oct)
- Overall Diameter: 48 mm
- Max Width: 64 mm
- Depth: 46 mm
- Weight: 0.25 kg
- Made in: Italy
Conclusion
The DH350 is built for designers who need serious high-frequency performance in minimal space. Its HLX™ phase plug, neodymium motor, and compact footprint make it a professional solution for coaxials, small tops, distributed systems, and install-grade monitors.
If you’re looking to save weight, reduce cabinet depth, and maintain audio quality, the DH350 delivers pro-grade performance in a form factor that’s hard to match.
VIEW MORE B&C PRODUCTS HERE.
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.
