Ciare NDH18-4S – 18″ High-Power Subwoofer Driver
The Ciare NDH18-4S is a professional 18-inch neodymium low-frequency driver designed for high-output subwoofer applications. Engineered to deliver deep, clean bass while maintaining high efficiency, this driver is suitable for both touring systems and fixed installations. Its lightweight neodymium magnet structure provides strength and reliability without the bulk of ferrite designs, allowing for easier handling and transportation.
With robust construction, precise thermal design, and excellent mechanical stability, the NDH18-4S ensures consistent performance across a wide range of demanding audio environments.
Deep and Controlled Low-Frequency Response
Featuring a nominal diameter of 450 mm (18 inches), the Ciare NDH18-4S moves large volumes of air to generate powerful sub-bass frequencies. Its frequency range from 30 Hz to 200 Hz ensures extended low-end reproduction, providing impactful and accurate bass for both music and effects.
Whether deployed in vented subwoofer enclosures, bass modules, or large-format PA systems, the NDH18-4S offers tight, controlled bass that remains distortion-free even at high SPL levels. The driver’s design prioritizes linear excursion and minimal cone breakup, resulting in a clear, authoritative low-frequency response.
High Power Handling and Thermal Management
The NDH18-4S is capable of 1000 W nominal power handling and 2000 W continuous program power, giving it the headroom necessary for demanding audio content. Its 100 mm (4-inch) voice coil is wound on a high-temperature former, ensuring excellent thermal stability under sustained high-output operation.
The driver’s efficient neodymium motor, combined with a ventilated gap, reduces heat buildup, minimizing thermal compression and maintaining consistent performance. This allows the NDH18-4S to produce loud, accurate bass for extended periods without compromising reliability.
High Sensitivity and Efficiency
With a sensitivity of 96.5 dB (1W/1m), the Ciare NDH18-4S converts amplifier power into high output efficiently. This makes it an excellent choice for systems requiring both strong low-end performance and manageable amplifier demand. High sensitivity ensures that the driver can achieve impactful bass even with moderate amplifier power, while retaining clarity and control over the frequency range.
Stable Impedance and System Integration
Operating at a nominal impedance of 8 Ω, with a minimum impedance of approximately 6.1 Ω, the NDH18-4S integrates easily into professional audio systems. Its predictable electrical behavior simplifies crossover design, cabinet integration, and system tuning, providing designers with confidence that performance will remain consistent across multiple units.
The neodymium motor structure also contributes to uniform magnetic flux and linear excursion, ensuring reliable performance in high-output subwoofer applications.
Robust Construction for Professional Environments
The Ciare NDH18-4S is built for professional use, featuring a die-cast aluminum basket for structural rigidity and long-term durability. The rubber half-roll surround and Nomex fabric suspension provide precise excursion control, while a treated paper cone ensures low-frequency fidelity with minimal distortion.
These materials and construction techniques allow the driver to withstand rigorous touring schedules, repeated high-SPL operation, and long-term installed system use without degradation in performance.
Ideal Applications
The Ciare NDH18-4S is optimized for a range of professional audio applications, including:
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High-output vented subwoofer systems
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Bass modules in two-way or multi-way cabinets
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Touring PA and concert subwoofer systems
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Fixed installations requiring reliable, deep bass reproduction
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OEM speaker designs demanding consistent performance
Its combination of deep low-frequency extension, high power handling, and lightweight neodymium design makes it a versatile solution for professional audio designers and installers.
Specifications
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Nominal Diameter: 450 mm (18 in)
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Voice Coil Diameter: 100 mm (4 in)
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Continuous Power Handling: 2000 W
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Nominal Power Handling: 1000 W
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Nominal Impedance: 8 Ω
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Minimum Impedance: ~6.1 Ω
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Frequency Range: 30 Hz – 200 Hz
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Sensitivity: 96.5 dB (1W/1m)
Performance Summary
The Ciare NDH18-4S provides deep, controlled bass with high efficiency and extended excursion capabilities. Its robust construction and thermal management allow for reliable operation under heavy load, making it an ideal choice for subwoofer enclosures, bass modules, and high-output professional audio systems.
This driver combines impactful low-end performance with long-term durability, providing designers and technicians with a trusted solution for demanding environments.
Conclusion
For professional subwoofer applications that require reliable high-output bass, the Ciare NDH18-4S delivers exceptional performance. With its combination of neodymium motor efficiency, extended low-frequency response, high sensitivity, and robust mechanical construction, it is a professional-grade solution for touring systems, fixed installations, and high-demand audio setups.
The Ciare NDH18-4S ensures powerful, clean bass in a compact, lightweight package, providing both performance and reliability for the most challenging professional audio environments.
Learn more about Ciare HERE
About Ciare
Ciare products are proudly manufactured in Italy, with production rooted in tradition and precision engineering. Built in their advanced facility near Ancona, Ciare combines Italian craftsmanship with cutting-edge automation and strict quality control to deliver components that meet the highest standards. With decades of experience in the Pro Audio industry, Ciare has earned its reputation as a trusted name for speaker builders worldwide—offering reliable, high-performance solutions that deliver real value without compromise.
