B&C DE640P 1.4″ Professional HT Polymer Compression Driver
The B&C DE640P is a high-performance 1.4-inch professional compression driver engineered to deliver exceptional efficiency, smooth frequency response, high power handling, and outstanding reliability for demanding professional sound reinforcement applications. Designed for use in touring systems, fixed installations, stage monitors, high-output point source loudspeakers, line arrays, and premium professional audio systems, the B&C DE640P combines advanced HT Polymer diaphragm technology with a powerful neodymium motor structure to provide remarkable acoustic performance across a wide operating bandwidth.
Developed to meet the needs of modern loudspeaker designers, the B&C DE640P offers an excellent balance between output capability, sonic accuracy, and long-term durability. The driver utilizes a substantial 65 mm (2.5 inch) aluminium voice coil coupled to a high-strength HT Polymer diaphragm, allowing it to reproduce high frequencies with impressive detail while maintaining smooth, natural tonal characteristics.
A key advantage of the B&C DE640P is its combination of high efficiency and controlled frequency response. With an impressive 109 dB sensitivity, the driver delivers substantial acoustic output with minimal amplifier power requirements. This efficiency makes it particularly attractive for professional systems where maximum headroom and performance are essential.
The compression driver is further enhanced by a powerful magnetic assembly producing 1.95 Tesla flux density, providing exceptional diaphragm control and contributing to the driver’s outstanding transient response and low distortion characteristics.
With 70 W nominal power handling, 140 W continuous power handling, a recommended crossover frequency of 1.2 kHz, and an operating range extending from 1 kHz to 18 kHz, the B&C DE640P provides a versatile solution for a wide variety of professional loudspeaker designs.
Key Features
- 1.4-inch throat diameter compression driver
- 70 W nominal power handling
- 140 W continuous power handling
- 109 dB sensitivity
- Frequency response from 1 kHz to 18 kHz
- Recommended crossover frequency of 1.2 kHz
- 65 mm (2.5 inch) aluminium voice coil
- HT Polymer diaphragm technology
- High-energy 1.95 T magnetic structure
- Low inductance design
- Excellent transient response
- Smooth and natural high-frequency reproduction
- High-output professional performance
- Compact and lightweight construction
- Designed for demanding professional applications
Engineered for Modern Professional Loudspeaker Systems
The B&C DE640P has been developed to satisfy the demanding requirements of contemporary professional sound reinforcement systems. Whether deployed in touring productions, permanent installations, houses of worship, theatres, or large-scale event venues, the driver is engineered to provide consistent and dependable performance.
Professional audio systems must deliver exceptional clarity and intelligibility while operating at elevated sound pressure levels. Compression drivers play a critical role in achieving these objectives, particularly in applications where vocal reproduction and high-frequency detail are essential.
The B&C DE640P addresses these requirements through a carefully engineered combination of advanced diaphragm materials, high magnetic flux density, and efficient motor design.
Its 36 mm (1.4 inch) throat diameter ensures compatibility with a broad range of professional horns and waveguides, providing loudspeaker designers with flexibility when developing custom system solutions.
Whether used in a two-way point source loudspeaker, a multi-way touring enclosure, or a high-performance installation system, the B&C DE640P delivers the performance required for professional audio applications.
Advanced HT Polymer Diaphragm Technology
One of the defining features of the B&C DE640P is its HT Polymer diaphragm.
Unlike traditional metallic diaphragms, HT Polymer technology is engineered to provide a highly controlled and smooth frequency response while maintaining excellent durability and output capability. The material’s mechanical characteristics help reduce unwanted resonances, contributing to a more natural sonic presentation.
This design approach is particularly beneficial in applications where vocal intelligibility, musical detail, and long-term listening comfort are priorities.
The HT Polymer diaphragm also offers excellent resistance to fatigue and thermal stress, making it suitable for demanding professional environments where drivers may be subjected to extended operating periods.
The result is a compression driver capable of delivering detailed and articulate high-frequency reproduction while maintaining tonal smoothness across its operating range.
For system designers seeking a refined and balanced high-frequency solution, the B&C DE640P provides significant advantages.
Large 65 mm Voice Coil Assembly
The B&C DE640P incorporates a substantial 65 mm (2.5 inch) aluminium voice coil, providing the thermal capacity and mechanical stability required for professional sound reinforcement applications.
Larger voice coils offer improved heat dissipation and greater thermal efficiency compared with smaller designs. This helps maintain consistent performance during extended operation at elevated power levels.
The robust voice coil architecture enables the driver to achieve 70 W nominal power handling and 140 W continuous power handling, ensuring dependable operation in demanding environments.
The aluminium winding material contributes to lower moving mass, improving transient response and allowing the diaphragm assembly to react rapidly to changing audio signals.
This combination of thermal stability and responsiveness helps the driver reproduce dynamic musical content with precision and accuracy.
For professional users, these characteristics translate into greater reliability, improved detail retrieval, and enhanced overall performance.
High-Energy 1.95 Tesla Magnetic Structure
At the core of the B&C DE640P is a powerful magnetic motor structure producing 1.95 Tesla flux density.
The high magnetic flux density provides exceptional control over diaphragm movement, contributing directly to the driver’s impressive 109 dB sensitivity rating.
Strong magnetic force allows rapid acceleration and deceleration of the diaphragm assembly, helping preserve transient information and improve overall sonic accuracy.
Precise diaphragm control also assists in reducing distortion and maintaining clarity during high-output operation.
The efficiency of the motor structure enables substantial acoustic output while minimizing amplifier power requirements, providing valuable headroom for professional sound systems.
This balance of efficiency and control is a major factor in the driver’s ability to deliver both high output levels and refined sound quality.
Excellent Sensitivity and Efficiency
With a sensitivity rating of 109 dB, the B&C DE640P ranks among the most efficient professional compression drivers in its class.
High sensitivity allows the driver to generate greater acoustic output from a given amplifier input, reducing power demands while increasing available system headroom.
This characteristic is especially important in large-scale sound reinforcement systems where maximizing efficiency can significantly improve overall system performance.
The driver’s efficiency contributes to strong projection, excellent vocal intelligibility, and impressive dynamic capability across a wide range of applications.
For system operators and loudspeaker designers alike, this efficiency translates into greater flexibility and improved acoustic performance.
Optimized Frequency Response
The B&C DE640P is engineered to operate across a frequency range of 1 kHz to 18 kHz, providing excellent coverage of the critical vocal and high-frequency spectrum.
This operating range allows the driver to reproduce essential vocal information, upper harmonics, and fine musical detail with exceptional clarity.
The combination of the HT Polymer diaphragm and powerful motor structure contributes to smooth response characteristics and accurate reproduction throughout the driver’s operating bandwidth.
Whether reproducing speech, live vocals, recorded music, or theatrical content, the driver is designed to maintain consistent tonal balance and articulation.
This capability makes the B&C DE640P suitable for both speech-focused and music-oriented sound reinforcement systems.
Designed for Low Crossover Applications
The recommended crossover frequency of 1.2 kHz provides loudspeaker designers with valuable system integration flexibility.
Lower crossover frequencies allow the compression driver to reproduce a larger portion of the vocal range while reducing the operating bandwidth requirements of the low-frequency section.
This can contribute to improved system coherence and more consistent directivity characteristics through the crossover region.
The combination of the large diaphragm assembly, robust voice coil, and powerful magnetic motor allows the B&C DE640P to perform effectively at these crossover points while maintaining reliability and output capability.
For professional loudspeaker designers, this flexibility can be a significant advantage when optimizing overall system performance.
Applications
The B&C DE640P is ideally suited for a wide range of professional audio applications, including:
- Touring PA systems
- Professional point source loudspeakers
- Multi-way sound reinforcement systems
- Stage monitoring systems
- Theatre audio systems
- Houses of worship
- Corporate AV installations
- Premium installation loudspeakers
- Entertainment venues
- Outdoor event systems
- Line array systems
- Live music reinforcement
Its combination of efficiency, power handling, and sonic refinement makes it suitable for both fixed and portable applications.
Compact and Lightweight Construction
Despite its impressive performance capabilities, the B&C DE640P maintains a compact and practical form factor.
The driver features an overall diameter of 110 mm (4.33 inches) and a depth of 51 mm (2.01 inches), allowing integration into a broad range of loudspeaker designs.
With a net weight of only 1.4 kg (3.09 lb), the driver offers an excellent balance between performance and installation convenience.
This compact construction makes it particularly attractive for applications where weight reduction and efficient enclosure design are important considerations.
Built for Professional Reliability
Reliability is a critical requirement in professional sound reinforcement systems, particularly in touring and installation environments where equipment is expected to operate consistently under demanding conditions.
The B&C DE640P has been engineered with durability and long-term performance in mind.
The robust HT Polymer diaphragm resists fatigue while maintaining consistent acoustic characteristics over time. The large voice coil provides effective thermal management, reducing the effects of heat buildup during extended operation.
Combined with the powerful magnetic structure and precision manufacturing standards associated with B&C Speakers, these features contribute to dependable performance throughout the driver’s operational life.
Technical Specifications
Throat Diameter: 36 mm (1.4 in)
Nominal Impedance: 8 Ω
Minimum Impedance: 7.6 Ω
Nominal Power Handling: 70 W
Continuous Power Handling: 140 W
Sensitivity: 109 dB
Frequency Range: 1 kHz – 18 kHz
Recommended Crossover: 1.2 kHz
Voice Coil Diameter: 65 mm (2.5 in)
Winding Material: Aluminium
Inductance: 0.14 mH
Flux Density: 1.95 T
Diaphragm Material: HT Polymer
Design Features
Driver Type: High Frequency Compression Driver
Throat Diameter: 36 mm (1.4 in)
Voice Coil Diameter: 65 mm (2.5 in)
Voice Coil Winding Material: Aluminium
Diaphragm Material: HT Polymer
Magnetic Flux Density: 1.95 T
Inductance: 0.14 mH
Recommended Crossover Frequency: 1.2 kHz
Mounting Information
Mounting Configuration: Four M6 holes positioned 90° apart on a 76 mm (3 in) diameter bolt pattern
Overall Diameter: 110 mm (4.33 in)
Depth: 51 mm (2.01 in)
Net Weight: 1.4 kg (3.09 lb)
Applications Summary
The B&C DE640P is a premium professional 1.4-inch compression driver designed to provide exceptional efficiency, refined sonic performance, and dependable long-term reliability. Featuring a 65 mm aluminium voice coil, HT Polymer diaphragm, powerful 1.95 Tesla magnetic structure, 109 dB sensitivity, 70 W nominal power handling, and 140 W continuous power handling, the driver is ideally suited for professional touring systems, high-performance installations, stage monitors, line arrays, and premium loudspeaker designs.
With its combination of smooth frequency response, high acoustic output, low crossover capability, and compact construction, the B&C DE640P delivers the performance and flexibility required by modern professional sound reinforcement systems. For loudspeaker designers seeking a high-output compression driver that combines efficiency, clarity, and reliability, the B&C DE640P represents an outstanding solution within the B&C professional product range.
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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.
