NX S21-A High Power Subwoofer

Compact and powerful, the NX S21-A offers the performance of a 21" subwoofer in a package not much larger than a typical 18" sub.

NX S21-A 2 X 15

The NX S21-A is a compact, high power active subwoofer system containing a neodymium magnet 21" woofer in a front-loaded, vented enclosure


  • 4.5" voice coil high power 21" neodym. woofer
  • 1000W digital amplifier: lightweight and compact
  • Large port area for reduced distortion
  • Stereo professional XLR line and 1/4" inputs (Combo) with loop through
  • Powercon Input/Output
  • Pole mount, stacking ready, wheels, aluminium side handles


  • Live sound
  • Music playback and sound reinforcement in mid-size venues.
  • Live performance systems and sound system rental.
  • Portable PA, clubs, ballrooms, corporate AV, live theatre, houses of worship, theme parks

Acoustical Specifications

Frequency Response: 30 Hz - 80 Hz
Max SPL: 135 dB
Woofer: 21"neo, 115 mm voice coil

Input Section

Input connector: Stereo combo xlr-jack
Output connector: Stereo xlr
Input sensitivity: + 4 dBu

Processor Section

Crossover frequencies: 60 Hz /80 Hz
Protections: Thermal, rms
Sensitivity control: Yes
Limiter: Soft peak limiter
Controls: Side/floor, contour
Phase switch: Yes
Controls: Xover/link, frq. cut


Total power: 1000 Watt
Low frequencies: 1000 Watt
Cooling: Convection
Connection: Powercon in/out

Physical Specifications

Height: 750 mm
Width: 660 mm
Depth: 700 mm
Weight: 53.2 kg
Cabinet: Baltic Birch
Hardware: Stacking fittings
Handles: 4 on side
Pole Mount/Cap: Yes

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