The GECKO® REVELATION SLA 818WA is an active 18" C.R.I.S.T.A.L.® Audiophile long-throw line array subwoofer module. It belongs to the extraordinary REVELATION SLA series line array system, which is the first audiophile-grade line array system in the world. It incorporates GECKO®'s revolutionary 3-tier C.R.I.S.T.A.L.® Audiophile Class-H amplification technology which operates optimally on single-phase 13A universal power supply!

Its long-throw and C.R.I.S.T.A.L.® WaveGuide 360° field coverage translates to balanced low frequency distribution gently to a very wide audience sweet spot, creating an equal-volume experience throughout the concert venue, without having ear-splitting damage to front row audience.

The GECKO® REVELATION SLA SLA 812RA/SLA 818WA active C.R.I.S.T.A.L.® Audiophile long-throw line array system is easy to set up and run, thanks to its plug-and-use concept. Its high-fidelity sound reproduction making it ideal for all genres of music — from classical, jazz, pop, electronic to rock.

The GECKO® REVELATION SLA 812RA/SLA 818WA active C.R.I.S.T.A.L.® Audiophile long-throw line array system is the perfect complement to all large houses-of-worship and reputable concert venues.


  • Speaker: 18” Waterproof Cloth/Aluminium C.R.I.S.T.A.L.® Woofer with Diecast Aluminium Frame
  • Max SPL: 140dB/m
  • Max RMS: 1200W
  • Impedance:
  • Sensitivity: 120dB/W/m
  • Frequency Response: 30Hz ~ 155Hz (C.R.I.S.T.A.L.® Audiophile Linear Response)
  • Nominal Coverage: C.R.I.S.T.A.L.® WaveGuide 360° Coverage
  • Amplifier Rated Output: 8Ω: 900W, 3-Tier C.R.I.S.T.A.L.® Audiophile Class-H
  • Amplifier Protections: Mid-Point DC Drift, Short Circuit (ISC), Open Circuit, Thermal (UQC), Overload, Clip Limiter (ACLC), Soft Start (SSC), Subsonic (DHPF), Ultrasonic and RF
  • Systems: GECKO® Active-X™, Phase Reverse Circuit, Ultra Quiet Cooling Design
  • AC Power: 110/220V ~ 50/60Hz Selectable Voltages

Physical Properties

  • Enclosure: 20mm Baltic Birch Plywood

  • Finish: Wear-Resistant Textured Black Paint
  • Hardware: Multi-Point Mounting/Rigging Frames
  • Grille: Powder Coated Perforated Steel, Foam-Backed (Black)
  • Audio Connectors: Balanced XLR Male Out (1), Balanced XLR Female In (1)
  • Power Connectors: PowerCON AC In (1), PowerCON AC Out (1)
  • Net Weight: 84kg
  • Dimension: (H) 610mm x (W) 910mm x (D) 780mm

Included Accessories

  • GECKO® Line Array Flight Case
  • Rigging Accessories (1 Lot)

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