Electro-Voice QRx 112/75, QRx-112, QRx-75 Specifications

KEY FEA TURES

• Fully rotatable asymmetrical horn f or use in
any cabinet position

• Externally switchable biamped or passive
operation

General Product Description

The QRx-112/75 is a two-way, full-range loudspeaker system that
incorporates a 12-inch woofer 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 the horn
provides a 15-degree up/35-degree down vertical coverage pattern.
The five-sided cabinet design allows this main PA system cabinet
to easily conform to duties as a floor monitor or to be tucked tightly
against a ceiling for low-profile applications. The fully rotatable horn
means that regardless of cabinet position, pattern control is fully
user-determined.

The QRx-112/75 is a good solution for small-to-medium size rooms
as a main PA, providing optimized midrange reproduction for speech
intelligibility and vocal clarity at moderate levels. As a floor monitor,
the tight and clear midrange coupled to a large format HF diaphragm
helps cut through stage rumble while delivering smooth reproduction.
The asymmetrical horn can allow a single box to more adequately
direct the high frequencies as needed, as well as streamline multi­cabinet arrays 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 one
12-inch transducer with a cast aluminum basket as the LF
component 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 positioning 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 suspension, allowing a full 360-degree rotation of the horn. The
enclosure shall be vented and tuned for optimum low-frequency
extension. An internal passive filter network shall be included
providing crossover filters or component bandpasses and nominal
system voicing. The input panel shall incorporate two switches
allowing external configuration between biamped or passive

QRx-112/75

Loudspeaker System

operation. Input connections shall be accommodated with two
paralleled NL4 female Speakon® connectors.

Loudspeaker system frequency response shall be no less than 75
Hz to 15 kHz (-3 dB) measured on axis. The loudspeaker shall
produce a sound pressure level (SPL) of 98 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 125 dB on axis at 1 meter. The
full-range system with passive network engaged shall handle 300
watts of amplified power long-term in compliance with AES-EIA
standards and have a nominal impedance of 8 ohms.

The loudspeaker enclosure shall be constructed of 13-ply void-free
cross-grain-laminated Birch plywood. It shall be finished in black or
white acrylic paint or available unfinished. It shall have five sides
with the fifth side angle as such to provide stable and safe placement
of the cabinet on its side for floor monitor applications. Handles

Speaker Description:

Part Number ............................................................... 301018-001

LF Section & Components .. 12-inch woofer 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

minimum) ............................................................................... 45 Hz

Recommended Active Crossover Frequency (24 dB/octave

typical) ............................................................................... 1500 Hz

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

Cabinet Type (shape) ....................................... Modified 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 16-GA steel

Options

WHI - white textured paint
UN - unfinished

Accessories............. SST-1 single stud rigging fitting (3 included)

shall be recessed within the sides of the enclosure and of such design to
allow safe handling from any direction. There shall be a 1-3/8 diameter pole
mounting socket located on the bottom of the cabinet. 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

Speaker Characteristics:

Frequency Response

- 3 dB .......................................................................... 75 Hz - 15 kHz

- 10 dB ........................................................................ 52 Hz - 18 kHz

Axial Sensitivity

SPL, 1 watt @ 1 m, Passive ..................................................... 98 dB

SPL, 1 watt @ 1 m, Biamp (LF/HF) ................................. 100/112 dB

Impedance

Passive ....................................................................................8 ohms

Biamp (LF/HF) ......................................................................8/8 ohms

Power Handling

Passive - Long-Term EIA .................................................... 300 watts

Short-term peak ................................................................ 1200 watts

Biamp - LF Long-Term EIA ................................................. 300 watts

Short-term peak ................................................................ 1200 watts

Biamp - HF Long-Term AES ................................................. 75 watts

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

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 Electro-Voice model
QRx-112/75.

Calculated Maximum SPL Output

Long-Term ............................................................................... 125 dB

Peak ......................................................................................... 131 dB

Nominal Coverage Angle

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

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

Dimensions

Height ................................................................ 26.60 in. (675.5 mm)

Width at front ..................................................... 15.35 in. (389.9 mm)

Width at back ....................................................... 6.86 in. (174.2 mm)

Depth ................................................................. 16.02 in. (371.5 mm)

Trapezoid Angle ........................................................ 10 Deg. per side

Weights

Net Weight ...................................................................... 58 lb (26 kg)

Shipping Weight ............................................................. 64 lb (29 kg)

Top View

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. 7/2001

Part Number 38109-985 Rev A

Front View

(with grille removed)

Dimensions

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.

800/392-3497 Fax: [phone]

Repair department at 800/685-2606

Specifications subject to change without notice.

U.S.A. and Canada only.