Overview

The 18 Sound 21NLW9601-8 is a high-caliber 21-inch subwoofer designed for exceptional audio performance. It features a remarkable 98 dB SPL 1W / 1m average sensitivity and a robust 135 mm split winding four-layer ISV copper coil. The subwoofer has a program power handling capacity of 3600 W, ensuring powerful and clear sound reproduction. Its carbon fiber reinforced treated cellulose cone and Triple Silicon Spider (TSS) system improve excursion control and linearity under extreme loading and SPL conditions. The Single Demodulating Ring (SDR) significantly reduces distortion, and its low noise cooling design minimizes power compression. This subwoofer is an ideal choice for bandpass and horn-loaded subwoofer designs.

Features

• 98 dB SPL 1W / 1m average sensitivity.


• 135 mm split winding four-layer ISV copper coil.


• 3600 W program power handling.


• Carbon fiber reinforced treated cellulose cone.


• Triple Silicon Spider for improved excursion control.


• Single Demodulating Ring for lower distortion.


• Low noise cooling design.


• Suitable for bandpass and horn-loaded subwoofer designs.

Specifications

• Nominal Diameter: 533 mm (21 inches)


• Nominal Impedance: 8 Ω


• Minimum Impedance: 7.9 Ω


• Power Handling: Nominal 1800 W, Continuous 3600 W


• Sensitivity: 98.0 dB


• Frequency Range: 25 - 2000 Hz


• Voice Coil: Diameter 135 mm, Copper winding


• Magnet Material: Neo


• Woofer Cone Treatment: Water and UV repellent


• Recommended Enclosure: 200.0 dm³ (7.06 ft³)


• Resonance Frequency: 37 Hz


• Xmax: 14.0 mm


• Net Weight: 13.5 kg (29.76 lb)

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