Description
The QRx-218S is a dedicated subwoofer system that
features the excellent low-frequency capabilities of
two (2) powerful EVX-180B 18-inch drivers with 4-inch
voice coils. In the QRx-218S, these drivers are frontmounted 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 handling 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 (2) sealed pocket
wheels at the bottom and two (2) handles at the top
of the system so it can be tilted back and moved
comfortably by one (1) person. On the rigging versions
of the QRx-218S, there are two (2) 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, for use 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
EVCoat, 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 QRx-218S can
augment the performance of even the finest sound
systems with high levels of extended bass response.
Technical specifications
System Configuration: Subwoofer (requires active
electronic filtering)
Frequency Response (-10 dB): 31 Hz – 250 Hz
Recommended High-Pass
Frequency:
35 Hz, 12 dB/octave minimum
Axial Sensitivity, SPL: 102 dB (1 watt@1m)
Max Calculated SPL: 139 dB (1 watt@1m)
Long-Term Power Handling: 1,200 watts
Short-Term Power Handling: 4,800 watts
Transducers: (2) EVX180B Cast Frame 18-inch
Woofer, 4-inch Voice Coil
Recommended Crossover
Frequency Range:
80 – 120 Hz, 24 dB/octave
Nominal Impedance: 4 Ω
Enclosure Material: 13-Ply Birch Plywood
Grille: Powder-Coated Steel, Fabric
Backed
Recommended Controller: AC-One or EV Dx46
Input Connectors: (2) Neutrik Speakon NL4’s
Dimensions (H x W x D): 39.98 in x 22.05 in x 23.77 in
(1015 mm x 560 mm x 603 mm)
Net Weight: 150 lb (68 kg) (each)
Shipping Weight: 160 lb (73 kg)
