NS21 Subwoofer Driver

Product Description

This is a subwoofer driver with a nominal diameter of 548 mm (21 in), designed for extremely high-output, deep low-frequency performance in professional audio and large-scale sound reinforcement systems. It features a 152 mm (6 in) copper voice coil (wound outside and inside) for excellent thermal management and extreme power handling.

The driver has a rated impedance of 8 ohms and a nominal AES power rating of 2100 W (4200 W continuous program), delivering a sensitivity of 96 dB (1 W/1 m). Its frequency response ranges from 28 Hz to 600 Hz, making it ideal for ultra-low frequency reinforcement in subwoofer enclosures.

Thiele-Small parameters include:

         Fs: 28 Hz

         Re: 5.6 ohms

         Qms: 6.647

         Qes: 0.3148

         Qts: 0.3

         Vas: 308 L

         Sd: 0.172 m

         Mms: 432 g

         BL: 38.2 TM

Mechanical & Mounting Details

         Overall diameter: 549 mm (21.6 in)

         Depth: 262 mm (10.3 in)

         Mounting bolt circle: 525 mm (20.6 in)

         Baffle cut-out: 506 mm (20 in)

         Bolt holes: 8 8 mm (0.37 in)

Shipping Information

         Net weight per unit: 18.8 kg

         Shipping weight per unit: 23 kg

         Package dimensions per unit: 61 59 34 cm