NEXO RS18 SubBass

NEXO RS18 applies NEXO's patent pending RAY SUB technology in a 2 x 18" subwoofer format.

NEXO RS18 SubBass

RAY SUB technology optimizes the positioning and phase relationships of radiating surfaces in vented enclosures, permitting acoustic distance from rear to front sections to always increase as frequency decreases. Consequently rear and front sections sum up efficiently over the entire subwoofer bandwidth, allowing for an average of 5db gain from the rear section in the forward direction and cancelling in the rear direction.


  • Low Profile, High Output, Modular Scalable Bass
  • Configurable directivity pattern
  • Cardioid pattern reduces rear levels by minimizing rear/side wall reflections
  • Aerodynamic profiled vents with 20db noise reduction and improved linearity at high SPL
  • Applies across entire NEXO product line


Components: 2 x 18" (46cm) long excursion neodymium 8Ω drivers
Dimensions (HxWxD) 520 x 1403 x 732mm with handles
520 x 1238 x 732mm without handles
Shape: Rectangular
Weight: Net Weight 90Kg
Net Weight with handles 105Kg
Net Weight with rigging system 126Kg
Connectors: 4 x NL4MP SPEAKON 4 pole on two connection plates(In & Through)
Construction: Baltic birch ply finish with structured black coating. Dark grey carpet finish also available.
System Operation
Electronic Controller: NX242ES4 Digital TDcontroller & NXAMP Powered Digital TDcontroller presets are precisely matched to RS18 and include sophisticated protection systems. Using RS18 without a properly connected TDController will result in poor sound quality and can damage components.
Speaker Cables: 1-/1+ = Right or Rear
2-/2+ = Left or Front
RS18 must use separate cables to the main system
Accessories: Bumper - Flying Plates - Handles - Dolly - Front Wheel Board
Rigging System [d] Please refer to the user manual before any operation

RS18 with NX242-ES4 TDController or NXAMP System Specification

  Omni Directional
Frequency Response @ -3db [a]: 31Hz-100Hz 31Hz-100Hz
Usable Range @ -6db [a]: 29Hz-200Hz 29Hz-120Hz
Sensitivity 1W @ 1m [b]: 107dB SPL Nominal 105dB SPL Nominal
Peak SPL @ 1m [b]: 143-146dBPeak (2x1750W to 2 x 4000/8Ω) 140-143dBPeak (2x1750W to 2 x 4000/8Ω)
Dispersion: Omni & Directional pattern over the entire useable bandwidth depending on the NX242ES4 or NXAMP TDcontrollers setup. (two channels of the NX242 or NXAMP are required to process directional setups)
Directivity Index [c]: 1.5 Q=4.3 DI=5.3dB
Crossover Frequency NX242 or NXAMP TDcontrollers preset dependent From 75Hz to 100Hz
Nominal Impedance: 2 x 8Ω
Recommended Amplifiers: 1 amplifier channel is required for omni mode operation, rated at 3500 Watts into 4Ω 2 amplifier channels are required for directional mode operation, each rated at 1750 to 4000 Watts into 8Ω per channel

As part of a policy of continual improvement, NEXO reserves the right to change specifications without notice.

[a] Response curves and data: anechoic far field above 200 Hz, half-space anechoic below 200 Hz.
[b] Sensitivity & peak SPL: will depend on spectral distribution. Measured with band limited pink noise. Refers to the specified +/- 3 dB range. Data are for speaker + processor + recommended amplifier combinations.
[c] Directivity curves and data: 1/3 octave smoothed frequency response, normalized to on-axis response. Data obtained by computer processing of off-axis response curves.
[d] Please refer to the RS15 user Manual.
Usable range data: frequency response capability with TD crossover slopes removed.

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