B&C 5NSM38 5″ Professional Midrange Driver
The B&C 5NSM38 is a high-efficiency 5-inch professional midrange LF driver engineered for applications where vocal clarity, transient accuracy, and lightweight construction are critical. Designed specifically as a dedicated midrange transducer, the B&C 5NSM38 combines a powerful neodymium motor assembly with a lightweight moving system to deliver exceptional sensitivity and outstanding mid-frequency reproduction in professional loudspeaker systems.
Developed for line arrays, multi-way loudspeaker systems, stage monitors, and high-performance sound reinforcement applications, the B&C 5NSM38 provides the accuracy and articulation required for demanding professional environments. Its dedicated midrange design allows it to reproduce vocals and instruments with remarkable detail while maintaining the efficiency and reliability expected from a professional B&C transducer.
With a sensitivity rating of 99 dB, a lightweight aluminium voice coil, and a powerful neodymium magnetic structure, the B&C 5NSM38 delivers exceptional output capability while minimizing overall system weight. This makes it particularly attractive for modern portable sound reinforcement systems and line array applications where performance and weight reduction are equally important.
The combination of advanced motor technology, low moving mass, and carefully optimized suspension geometry allows the B&C 5NSM38 to maintain excellent transient response and vocal intelligibility across its intended operating bandwidth. Whether deployed in compact line arrays, stage monitoring systems, or dedicated midrange sections of multi-way loudspeakers, this driver delivers professional-grade performance and long-term reliability.
Key Features
- 110 W nominal power handling
- 220 W continuous program power handling
- 38 mm (1.5 inch) aluminium voice coil
- 99 dB sensitivity
- 300 Hz – 3500 Hz frequency response
- Lightweight neodymium ring magnet assembly
- Glass fibre voice coil former
- Low moving mass design
- Double roll surround geometry
- WP waterproof front cone treatment
- Optimized for dedicated midrange reproduction
- Excellent power-to-weight ratio
Advanced Neodymium Motor Technology
At the heart of the B&C 5NSM38 is a powerful neodymium ring magnet motor assembly engineered to provide exceptional magnetic strength while minimizing overall driver weight. Neodymium technology offers a significant weight advantage compared to traditional ferrite designs, making the driver particularly suitable for portable sound reinforcement systems and line array applications.
The motor assembly generates an impressive 1.45 Tesla flux density, providing excellent control of the moving assembly and contributing to the driver’s outstanding sensitivity and transient response characteristics.
Combined with a strong Bl factor of 10.1 Tm, the motor system delivers precise cone control and highly efficient energy conversion. This allows the B&C 5NSM38 to maintain excellent articulation and clarity even during demanding high-output operation.
The driver’s optimized magnetic circuit contributes to low distortion performance and accurate midrange reproduction, ensuring vocals and instruments remain detailed and intelligible throughout its operating range.
Lightweight Voice Coil Design
The B&C 5NSM38 utilizes a 38 mm aluminium voice coil wound on a durable glass fibre former. This combination provides an excellent balance between low moving mass, thermal stability, and long-term reliability.
Aluminium winding material significantly reduces the moving mass of the driver, allowing for faster acceleration and improved transient response. This is particularly beneficial in dedicated midrange applications where speed and accuracy are essential.
The glass fibre former provides excellent thermal resistance while maintaining structural integrity under demanding operating conditions. Together, these materials allow the driver to handle 110 W nominal power and 220 W continuous program power while preserving performance consistency.
With a 7 mm winding depth and 6 mm magnetic gap depth, the voice coil assembly is optimized for accurate midrange reproduction while maintaining excellent efficiency.
Cone and Suspension System
The B&C 5NSM38 features a radial cone profile engineered specifically for midrange applications. This cone geometry promotes smooth response characteristics and controlled acoustic behaviour throughout the operating bandwidth.
The suspension system incorporates a double roll surround, helping maintain accurate cone movement while supporting the mechanical stability required for professional sound reinforcement applications.
A single spider suspension system ensures proper voice coil alignment and contributes to the driver’s excellent reliability and predictable performance characteristics.
To improve durability and environmental resistance, the cone assembly incorporates WP Waterproof Front Side treatment. This protective coating helps safeguard the cone against moisture and humidity while maintaining long-term performance consistency.
Optimized for Midrange Performance
The B&C 5NSM38 has been developed specifically as a dedicated midrange driver and is optimized for applications requiring maximum vocal intelligibility and articulation.
Its operating frequency range of 300 Hz to 3500 Hz places it directly within the critical vocal and instrument reproduction region. This allows the driver to reproduce speech, vocals, guitars, keyboards, and other midrange content with outstanding accuracy.
The combination of a lightweight moving assembly and high sensitivity allows the driver to maintain excellent dynamic performance while requiring relatively little amplifier power to achieve high output levels.
The extremely low 0.15 mH inductance contributes to extended high-frequency performance and improved transient accuracy, making the B&C 5NSM38 particularly effective in demanding professional applications.
Professional Loudspeaker Integration
The compact dimensions and lightweight construction of the B&C 5NSM38 make it highly versatile for a wide range of professional loudspeaker designs.
Typical applications include:
- Professional line array systems
- Multi-way loudspeaker systems
- Stage monitoring systems
- Vocal reinforcement systems
- Dedicated midrange sections
- Portable PA systems
- Installed sound reinforcement systems
- High-output compact loudspeakers
Its neodymium motor structure allows designers to minimize system weight while maintaining the performance standards required for professional audio applications.
Technical Specifications
Nominal Diameter: 127 mm (5 in)
Nominal Impedance: 8 Ω
Minimum Impedance: 6.3 Ω
Nominal Power Handling: 110 W
Continuous Power Handling: 220 W
Sensitivity: 99 dB
Frequency Range: 300 Hz – 3500 Hz
Voice Coil Diameter: 38 mm (1.5 in)
Winding Material: Aluminium
Former Material: Glass Fibre
Winding Depth: 7 mm (0.29 in)
Magnetic Gap Depth: 6 mm (0.24 in)
Flux Density: 1.45 T
Woofer Cone Treatment: WP Waterproof Front Side
Thiele-Small Parameters
Fs: 300 Hz
Re: 5.3 Ω
Qes: 0.99
Qms: 4.1
Qts: 0.79
Vas: 0.3 dm³ (0.01 ft³)
Sd: 95 cm² (14.73 in²)
η₀: 1.15 %
Xmax: 2.2 mm
Xvar: 3 mm
Mms: 9 g
Bl: 10.1 Tm
Le: 0.15 mH
EBP: 303 Hz
Design Features
Surround Shape: Double Roll
Cone Shape: Radial
Magnet Material: Neodymium Ring
Spider: Single
Pole Design: T-Pole
Woofer Cone Treatment: WP Waterproof Front Side
Mounting Information
Overall Diameter: 157 mm (6.2 in)
Bolt Circle Diameter: 142 mm (5.6 in)
Baffle Cutout Diameter: 122 mm (4.8 in)
Depth: 108 mm (4.25 in)
Flange and Gasket Thickness: 9 mm (0.35 in)
Air Volume Occupied by Driver: 1.2 dm³ (0.04 ft³)
Net Weight: 1.4 kg (3.09 lb)
Shipping Units: 1 Piece
Shipping Weight: 1.6 kg (3.53 lb)
Shipping Box: 170 × 170 × 140 mm
Recone Kit: RCK005NSM388
Applications
The B&C 5NSM38 is engineered specifically for professional midrange applications where high sensitivity, low weight, and exceptional vocal reproduction are required. Its powerful neodymium motor assembly, lightweight aluminium voice coil, and dedicated midrange tuning make it an excellent choice for line arrays, stage monitors, multi-way loudspeaker systems, and professional sound reinforcement projects.
With outstanding efficiency, excellent transient response, and proven B&C reliability, the B&C 5NSM38 provides system designers with a professional-grade midrange solution capable of delivering exceptional clarity and performance in demanding audio environments. For applications where accurate vocal reproduction and lightweight construction are priorities, the B&C 5NSM38 is an outstanding choice.
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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.
