Electro Voice Speaker QRx 218S User Manual

QRx218S  
Dual 18” Subwoofer  
Loudspeaker System  
Key Features:  
Compact, high-output dual 18-inch sub with  
concert-proven EVX-180B woofers  
Available in black and by special order in  
white or with L-track rigging  
Rear-mounted tilt-back pocket wheels allow  
one person to move the system  
(not available on rigging version)  
EV comfort-lift handles  
Comes with metal socket and 34-inch pole  
for elevating two-way system  
(not available on rigging version)  
13-ply birch plywood enclosure finished in  
Futuratm  
General Description:  
Technical Specifications:  
System Configuration: Subwoofer (requires active electronic  
filtering)  
The QRx-218S is a dedicated subwoofer system that features  
the excellent low-frequency capabilities of two powerful EVX-  
180B 18-inch drivers with 4-inch voice coils. In the QRx-218S,  
these drivers are front-mounted in a compact enclosure that  
is tuned to 36 Hz and delivers solid bass fundamentals. The  
1,200-watt continuous, 4,800-watt peak power capacity of  
the QRx-218S easily provides 133 dB SPL continuous, 139  
dB peak output capability at 1 meter. The QRx-218S  
enclosure has EV’s recessed comfort-lift handles on the top  
and the bottom of the enclosure so the box can be lifted easily.  
On the back of the standard versions of the enclosure are  
two sealed pocket wheels at the bottom and two handles at  
the top of the system so it can be tilted back and moved  
comfortably by one person. On the rigging versions of the  
QRx-218S, there are two L-tracks on the top and bottom of  
the enclosure to allow the system to be hung horizontally or  
vertically. The standard versions of the QRx-218S are also  
equipped with a metal 1-3/8-inch mounting socket and are  
shipped with a 34-inch pole to allow elevation of full-range  
speakers above the sub. The QRx-218S enclosure is built of  
13-ply, void-free, grain-oriented birch plywood that is coated  
with Futura, a sprayed on polyurethane finish that is very  
rugged and weather resistant. The drivers are protected from  
damage by a 16-gauge powder-coated steel grille with fabric  
backing. The enclosure is available in black or white finishes,  
with or without the rigging hardware. When paired with a  
powerful, high-quality amplifier such as EV’s P1201 Modular  
Precision Series or the P3000 Precision Series units, the QRx-  
218S can augment the performance of even the finest sound  
systems with high levels of extended bass response.  
Freq. Response (-10 dB): 31 Hz - 250 Hz  
Recommended High- 35 Hz, 12 dB/octave minimum  
Pass Frequency:  
Axial Sensitivity, SPL: 102 dB (1 watt@1m)  
Max Calculated SPL: 139 dB (1 watt@1m)  
Long-Term Power 1,200 watts  
Handling:  
Short-Term Power 4,800 watts  
Handling:  
Transducers: (2) EVX180B Cast Frame 18-inch  
Woofer, 4" Voice Coil  
Recommended Crossover 80 - 120 Hz, 24 dB/octave  
Frequency Range:  
Nominal impedance: 4 ohms  
Enclosure Material: 13-Ply Birch Plywood  
Grille: Powder-Coated Steel, Fabric Backed  
Recommended EV Dx38 or AC-One  
Controller:  
Input connectors: (2) Neutrik Speakon NL4's  
Dim (H x W x D): 39.98" x 22.05" x 23.77"  
(1015mm x 560mm x 603mm)  
Net Weight (each): 150 lbs (68 kg)  
Shipping Weight: 160 lbs (73 kg)  
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