S 18a

Touring high performance self-powered 18″ subwoofer

TransducersLF : 1 x 18″
SPL peak / 1m (measured)134 dB
Weight40kg / 88.18lbs
RiggingPole mount
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S 18a is a compact, high-performance self-powered touring subwoofer, providing the perfect companion to the AUDIOFOCUS VENU, FR-X, or ARES 8 series in standalone and stacked configurations.

The subwoofer houses a long excursion 18″ neodymium driver and combines front diffusion, bass reflex, and transmission line design for ultimate efficiency and performance.

An advanced AUDIOFOCUS Class D amplifier module with integrated DSP and 4 versatile presets allows S 18a to be quickly deployed in any configuration, including cardioid and end-fire.

S 18a is built with pride in Belgium and coated in tough, weather-resistant polyurea to safeguard your investment. The cabinet front is protected by a rigid metal grill, backed by acoustically transparent foam. Its compact design and ergonomic handles make S 18a easy to transport and deploy.


  • Powerful bass-reflex T-line design
  • Mobile applications
  • Pole mount socket
  • Self-powered, plug ‘n play
  • 6 presets

Technical specifications

DescriptionHigh-power self-powered subwoofer
Transducers LF: 1 x 18″
Frequency range (-6dB)38Hz-100Hz
SPL max (1)134 dB
ProcessingDedicated AUDIOFOCUS omni and cardioid presets
RiggingPole socket
Audio ConnectorsIN: 1×3-point XLR
LINK: 1×3-point XLR
Power ConnectorsIN: 1×3-point powerCON TRUE1TOP
LINK: 1×3-point powerCON TRUE1TOP
Dimensions (H x W x D)510 x 650 x 560 mm
20.07 x 25.59 x 22.04 inches

Weight40kg / 88.18lbs
FinishHighly resistant polyurea coating

CabinetHigh grade birch plywood

(1) Peak level measured at 1 m under free field conditions using pink noise with crest factor 5

Gll files for Ease and Easefocus

S 18

Gll • 1.64 Mo • 06/01/2022

S 18 Stack

Gll • 1.78 Mo • 06/01/2022

Firmware update SCiO
+ Procedure guide

ZIP • 5.9 Mo • 09/04/2024
PDF • 143 Ko • 09/04/2024