QRx-115/75
Loudspeaker System
General Product Description
The QRx-115/75 is a two-way, full-range loudspeaker system
that incorporates a 15-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 regardless of cabinet position, pattern
control is fully user-determined.
The QRx-115/75 is a good solution for small-to-medium size
rooms as a main PA, providing moderate levels with good
bass response in music or speech reproduction for DJs or
live bands. The asymmetrical horn can allow a single box to
more adequately direct the high frequencies as needed, as
well as streamline multi-cabinet arrays 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 15-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
Speaker Description:
Part Number ............................................................... 300995-001
LF Section & Components .. 15-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 perforated 16-GA steel
Options:
WHI - white textured paint
UN - unfinished
Accessories ............. SST-1 single stud rigging fitting (3 included)
component bandpasses 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 60 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 124 dB on axis at 1 meter. The full-range system
with passive network engaged shall handle 400 watts of
amplified power long term in compliance with AES-EIA
standards and have a nominal impedance of 8 ohms.
KEY FEATURES
•
Fully rotatable asymmetrical horn for use in any
cabinet position
•
Externally switchable biamped or passive
operation
