Electro-Voice QRX-212/75-BLK Specifications

KEY FEA TURES

• Fully Rotatable Asymmetrical Horn for use in any
cabinet

• Externally Switchable Biamp or Passive Operation

General Product Description

The QRx-212/75 is two-way, full-range loudspeaker system
incorporating two 12-inch woofers and a 3-inch voice coil
compression driver on an asymmetrical 75-degree x 50-degree
fully rotatable constant-directivity horn. In factory delivered position,
this provides a 15-degree up/35-degree down vertical coverage
pattern. The trapezoidal cabinet design allows this main PA system
cabinet to easily conform to multi-cabinet arrangements or limited
space clearances without sacrificing internal volume. The fully
rotatable horn means regardless of cabinet position, pattern control
is user-determined. The QRx-212/75 is a good solution for medium
size rooms and audiences as a main PA providing moderate levels
with good bass response and added punch in the lower and mid
frequencies, satisfying most DJ and live band applications. The
asymmetrical horn can allow a single box to more adequately direct
the high frequencies as needed, as well as streamline multi-cabinet
arrays when rotated by extending horizontal coverage while
minimizing overlapping and allowing tighter packs between the
cabinets.

Architects’ and Engineers’ Specifications

The two-way, full-range loudspeaker system shall incorporate two
12-inch transducers with cast aluminum baskets as the LF
components and one 3-inch diameter voice coil/diaphragm
compression driver as the HF component. The compression driver
shall be mounted on a 75-degree x 50-degree asymmetrical
constant directivity horn with a factory delivered position of 15
degrees up/35 degrees down/50 degrees horizontal configuration.
The horn shall be constructed of a material and design so as to be
capable, structurally, of supporting the HF driver without any internal
braces or suspensions, allowing a full 360-degree rotation of the
horn. The enclosure shall be included, providing crossover filters
for component band passes and nominal system voicing. The input
panel shall incorporate two switches, allowing external configuration
between biamped or passive operation. Input connections shall be
accommodated with two paralleled NL4 female Speakon
connectors.

Loudspeaker system frequency response shall be no less than 52
Hz to 16 kHz (-3 dB) measured on axis. The loudspeaker shall
produce a sound pressure level (SPL) of 102 dB on axis at 1 meter
with a power input of 1 watt and shall be capable of sustaining a full
power, long-term average output of 129 dB on axis at 1 meter (135
dB peaks). The full-range system, with passive network engaged,

QRx-212/75

Dual 12-inch Full- Range

Loudspeaker System

shall handle 600 watts of amplified power long-term in compliance
with AES-EIA standards and have a nominal impedance of 4 ohms.

The loudspeaker enclosure shall be constructed of 13-ply void­free cross-grain-laminated Birch plywood. It shall be finished in black
or white acrylic paint or available unfinished. It shall be of a
trapezoidal shape. Handles shall be recessed within the sides of
the enclosure and of such design to allow safe handling from any

®

direction. The top and bottom of the enclosure shall have L-track
rigging installed and the rear shall have a pull-up point. Three single
studded ancra fittings rated for overhead use shall be included with
each loudspeaker system. Fittings shall include a tethered safety
pin to ensure proper installation.

The two-way full-range loudspeaker system shall be the Electro­Voice model QRx-212/75.

Specifications

Frequency Response

-3 dB ............................................................................. 75 Hz

-10 dB ........................................................................... 52 Hz

Axial Sensitivity

SPL, 1 watt @ 1 m, Passive ....................................... 102 dB

SPL, 1 watt @ 1 m, Biamp (LF/HF) ..................... 101/112 dB

Impedance

Passive ....................................................................... 4 ohms

Biamp .......................................................................4/8 ohms

Power Handling

Passive — Long-term EIA ...................................... 600 watts

Short-term peak .................................................... 2400 watts

Biamp — LF Long-term EIA ................................... 600 watts

Short-term peak .................................................... 2400 watts

Biamp — HF Long-term AES ................................... 75 watts

Short-term peak ...................................................... 300 watts

Calculated Maximum Output SPL

Long-term ................................................................... 129 dB

Peak ............................................................................ 135 dB

Nominal Coverage Angle

Horizontal (-6 dB).............................................................. 75°

Vertical (-6 dB) ........................................................ +15°/-35°

Dimensions

Height ................................................... 38.98 in. (990.1 mm)

Width at front ........................................ 15.47 in. (392.9 mm)

Width at back ........................................ 10.79 in. (274.1 mm)

Depth .................................................... 14.77 in. (375.2 mm)

Weights

Net weight ......................................................... 80 lb (36 kg.)

Shipping Weight ................................................ 88 lb (40 kg.)

Speaker Description

Part Number ............................................................. 301115-001

LF Section & Components ........... (2) 12-inch woofers in vented

enclosure
HF Section & Components DH7 compression driver with 3-inch

titanium diaphragm on asymmetric 75 x 50 horn

System Configuration.................................. Two-way, Full-range

Powering Configuration ................ Switchable passive or biamp

Recommended Active High-pass Frequency

(12 dB/octave min.) .............................................................. 45 Hz

Recommended Active Crossover Frequency

(24 dB/octave min.) .......................................................... 1500 Hz

Passive Crossover Frequency...................................... 1800 Hz

Cabinet Type (shape).................................................... Trapezoid

Enclosure Materials ................................... 13-ply birch plywood

Finish ................................................ Black acrylic textured paint

Connectors ..................................................... Two Neutrik® NL4

Suspension Hardware
L-track top and bottom; single-stud plate on back for pull-up

Grille......................... Powder-coated perforated 16-GA steel

Options: WHI-white textured paint

UN-unfinished

Accessories................................ SST-1 single stud rigging fitting

Top View

Front View

(without grille)

USA 12000 Portland Ave South, Bur nsville, MN 55337, Phone: [phone], Fax: [phone]
Canada 705 Progress Avenue, Unit 46, Scarborough, Ontario, Canada, M1H2X1, Phone: [phone], Fax: [phone]
Germany Hirschberger Ring 45, D94315, Straubing, Germany, Phone: [phone], Fax: [phone]
France Parc de Courcerin, Allee Lech Walesa, Lognes, 77185 Marne la Vallee, France, Phone: [phone], Fax: [phone]
Australia Unit 23, Block C, Slough Business Park, Slough Avenue, Silverwater, N.S.W. 2128, Australia, Phone: [phone], Fax: [phone]
Hong Kong Unit E & F, 21/F, Luk Hop Industrial Bldg., 8 Luk Hop St., San PO Kong, Kowloon, Hong Kong, Phone: [phone], Fax: [phone]
Japan 5-3-8 Funabashi, Setagaya-ku, Tokyo, 156-0055 Japan, Phone: [phone], Fax: [phone]
Singapore 3015A Ubi Rd 1,05-10, Kampong Ubi Industr ial Estate, Singapore 408705,Phone: [phone], Fax: [phone]
Mexico Av. Parque Chapultepec #66-201, Col. EI Parque Edo. De Mexico 53390, Mexico, Phone: [phone], Fax: [phone]
UK 4, The Willows Centre, Willow Lane, Mitcham,Surrey CR4 4NX, UK, Phone: [phone], Fax: [phone]
Africa,Mid-East Hirschberger Ring 45, D94315, Straubing, Germany, Phone: [phone], Fax: [phone]
Latin America 12000 Portland Ave South, Bur nsville, MN 55337, Phone: [phone], Fax: [phone]

www.electrovoice.com  Telex Communications, Inc.  www.telex.com

© Telex Communications, Inc. 07/2001
Part Number 38110-009 Rev A

Side View

Back View

For customer orders, contact the Customer Service department at

For warranty repair or service information, contact the Service

For technical assistance, contact Technical Support at 866/78AUDIO

Please refer to the Engineering Data Sheet for warranty information.

Specifications subject to change without notice.

U.S.A. and Canada only.

800/392-3497 Fax: [phone]

Repair department at 800/685-2606