B&C 8NDL64 8″ Professional Woofer LF Driver
The B&C 8NDL64 is a professional 8-inch woofer LF driver engineered for compact high-output loudspeaker systems requiring lightweight construction, strong motor control, and reliable thermal performance. Built around a neodymium inside slug motor assembly and advanced cooling architecture, the B&C 8NDL64 delivers professional output capability while maintaining reduced weight for portable and installed sound reinforcement applications.
Designed for compact two-way systems, stage monitoring applications, portable PA systems, and professional loudspeaker designs, the B&C 8NDL64 combines a powerful magnetic structure with optimized suspension geometry and thermal management technologies. Its compact loading characteristics and high efficiency make it particularly suitable for applications where enclosure size and system weight are critical considerations.
Key Features
- 350 W nominal power handling
- 700 W continuous program power capacity
- 64 mm (2.5 inch) copper voice coil
- 97 dB sensitivity
- 80 Hz – 4000 Hz frequency response
- Neodymium inside slug motor assembly
- Shorting copper cap for extended HF response
- Ventilated voice coil gap for reduced power compression
- WP waterproof front cone treatment
- Optimized for compact vented enclosure applications
Lightweight Neodymium Motor Structure
The B&C 8NDL64 utilizes a neodymium inside slug motor structure, allowing the driver to maintain strong magnetic performance while significantly reducing overall weight compared to conventional ferrite alternatives. Reduced driver weight makes the transducer particularly suitable for portable loudspeaker systems where lower cabinet mass is important.
The motor assembly incorporates a shorting copper cap, designed to reduce inductance modulation while improving upper-frequency behavior. Lower inductance variation contributes to smoother crossover integration and more controlled response characteristics when integrated into compact multi-way systems.
With a measured 1.25 T flux density and a strong 17.5 Tm BL factor, the motor structure maintains excellent control over cone movement while supporting efficient energy transfer and stable output performance. These characteristics contribute significantly to transient accuracy and acoustic efficiency.
Voice Coil Construction and Thermal Performance
At the center of the B&C 8NDL64 is a 64 mm copper voice coil wound on a glass fibre former. The larger diameter voice coil improves heat dissipation capability while maintaining mechanical rigidity during continuous operation. This construction supports improved long-term reliability in demanding professional applications.
The driver supports 350 W nominal power handling and 700 W continuous program power handling, allowing reliable operation in professional sound reinforcement systems requiring sustained output capability. A ventilated voice coil gap improves airflow through the motor assembly, helping minimize thermal buildup and reducing power compression during extended operation.
Combined with the optimized cooling structure, this design helps maintain more stable performance under demanding operating conditions.
Cone Geometry and Suspension Design
The B&C 8NDL64 utilizes an exponential cone profile combined with a double-roll surround geometry, supporting controlled cone movement while maintaining excursion capability for compact low-frequency applications. This suspension geometry balances efficiency with mechanical control.
A single spider suspension system provides mechanical stability while helping maintain predictable cone movement during higher output conditions. This suspension configuration contributes to controlled transient response and stable long-term performance.
The cone assembly incorporates WP waterproof front-side treatment, improving resistance against humidity and environmental exposure in both portable and installed sound reinforcement systems.
Compact Enclosure Integration
One of the major strengths of the B&C 8NDL64 is its ability to operate effectively in very compact enclosure designs.
The manufacturer recommends a 10 dm³ enclosure volume with an 85 Hz tuning frequency, allowing designers to achieve strong performance from compact vented cabinet designs while maintaining manageable enclosure dimensions. These loading characteristics make the driver especially suitable for lightweight professional loudspeaker systems.
Typical applications include:
- Compact two-way loudspeaker systems
- Portable PA systems
- Professional stage monitors
- Compact bass reflex cabinets
- Installed sound reinforcement systems
- Lightweight touring loudspeakers
Technical Specifications
Nominal Diameter: 200 mm (8 in)
Nominal Impedance: 8 Ω
Minimum Impedance: 7.2 Ω
Nominal Power Handling: 350 W
Continuous Program Power: 700 W
Sensitivity: 97 dB
Frequency Range: 80 Hz – 4000 Hz
Voice Coil Diameter: 64 mm (2.5 in)
Winding Material: Copper
Former Material: Glass Fibre
Winding Depth: 14 mm
Magnetic Gap Depth: 8 mm
Flux Density: 1.25 T
Magnet Material: Neodymium Inside Slug
Cone Shape: Exponential
Surround Shape: Double Roll
Spider Design: Single
Pole Design: T-Pole
Cone Treatment: WP Waterproof Front Side
Recommended Enclosure: 10 dm³
Recommended Tuning: 85 Hz
Thiele-Small Parameters
Fs: 80 Hz
Re: 5.4 Ω
Qes: 0.25
Qms: 10.91
Qts: 0.25
Vas: 9.6 dm³
Sd: 220 cm²
η₀: 1.88 %
Xmax: 4.5 mm
Xvar: 5 mm
Mms: 28 g
BL Factor: 17.5 Tm
Le: 0.62 mH
EBP: 320 Hz
Mounting Information
Overall Diameter: 225 mm
Bolt Circle Diameter: 210 mm
Baffle Cutout Diameter: 187 mm
Depth: 95 mm
Flange and Gasket Thickness: 10 mm
Air Volume Occupied by Driver: 1.5 dm³
Net Weight: 2.6 kg
Shipping Weight: 3.05 kg
Shipping Box: 255 × 255 × 150 mm
Recone Kit: RCK008NDL648
Applications
The B&C 8NDL64 is engineered for professional low-frequency applications where compact loading, lightweight construction, and high efficiency are priorities. Its neodymium motor structure, optimized cooling architecture, and compact cabinet compatibility make it particularly suitable for portable PA systems, stage monitors, compact loudspeaker systems, and installed professional audio applications.
For system designers requiring a lightweight professional woofer optimized for compact enclosure designs and high output density applications, the B&C 8NDL64 provides an effective balance of portability, efficiency, and dependable professional performance.
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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.
