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Electro-Voice QRx S 18" Subwoofer Speaker B

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Frequently bought together:



  • High-level extended LF with concert proven performance
  • Accurate transient detail
  • Available in Standard and Riggable (L-Track) versions
  • EVX-180B woofers for superior linear excursion
  • High sensitivity, 139 db maximum SPL (peak)
  • Power handling: 1200 W continuous, 4800 W peak
  • Rectangular 13-ply birch vented enclosure
  • Built-in handles and sealed pocket wheels (Standard )
  • Integrated pole-mount receptacle (Standard )
  • Black EVCoat finish (white by special order)


Axial Sensitivity (SPL, 1 W @ 1 m) 102 dB
Chassis Size 457.2 mm (18")
Color Black, White, Unfinished
Coverage (Nominal -6 dB) Essentially Omni
Input Connections 2 Neutrik® NL4
Speaker Type Subs
Frequency Response (-3 dB) 38 - 125 Hz
Frequency Response (-10 dB) 31 - 250 Hz
Internal Crossover No
Recommended High-Pass Frequency 35 Hz 12 dB/octave
Sensitivity 1 W/1 m 102 dB
Max. SPL/1m (calc) 139 dB
System Power Handling (Continuous/Program/Peak) 1200//4800 Watts
LF Transducer Two 18-inch EVX180B
Crossover Frequency 100 Hz 24 dB/octave
Nominal Impedance (Passive) 4 Ω
Flying Optional
Outdoor No
Height 1015 mm (39.96")
Width 560 mm (22.05")
Depth 602 mm (23.7")
Weight Net 68 kg (149.91 lbs)
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