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SPECIFICATIONS QW
™
-1
Third Harmonic:
200 Hz: 5.25%
1 kHz: 0.31%
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rreeggiioonn aanndd ssllooppee::
Mid Frequency to High Frequency:
1,000 Hz at 18 dB/octave
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Mid Frequency: 0 ms
High Frequency: delay 0.813 ms
IImmppeeddaannccee ((ZZ))::
Mid Frequency:
Nominal: 4 Ohms
Minimum: 4.2 Ohms
High Frequency:
Nominal: 8 Ohms
Minimum: 5.4 Ohms
IInnppuutt ccoonnnneeccttiioonnss::
2xNL4MP bi-amp MF and HF inputs in
parallel
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0.720 plywood finished in black
Hammer Head
™
hard coating
MMoouunnttiinngg pprroovviissiioonnss::
(12) 3/8"-16 threaded mounting
suspension points (three each top and
bottom and two each side and back).
Use only forged shoulder machinery eye
bolt, Mil Spec MIL51937-3.
DDiimmeennssiioonnss ((HH xx WW xx DD))::
Front:
48.5" H x 21.0" W x 30.38" D
1232 mm x 533 mm x 772 mm
Rear:
48.5" H x 10.38" W x 30.38" D
1232 mm x 264 mm x 772 mm
NNeett wweeiigghhtt::
154 lbs. (70 kg)
FFeeaattuurreess
• 200 Hz to 18 kHz
• Patented 4" diaphragm titanium
compression driver, ferro fluid cooled
• Patented Quadratic Throat
Waveguide
™
• Flexible suspension provisions
• Maximum concert power
• Designed for professional bi-amp
applications
AApppplliiccaattiioonnss
• Stadiums
• Arenas
• Multi-purpose facilities
• Cruise ships
• Theme parks
• Concerts
• Theaters
DDeessccrriippttiioonn
The new QW-1 is designed for the top end
of a three- or four-way professional high
performance sound system. When used in
conjunction with the QW-215 and QW-218,
in four-way applications, the sound
pressure levels of a single four-way can
reach SPLs of 140 dB continuous. The
power handling of this system in four-way
applications approaches 6800 Watts
program. Due to its high efficiency drivers,
the QW-1 has a rating of 1200 Watts
program for the mids, with a 44XT
™
rated
at 200 Watts program (band limited
1000 Hz to 20 kHz). For reference, the
QW-215 is rated at 2400 Watts program
and the QW-218 is rated at 3200 Watts
program.
The QW’s patented CH
®
-642qt horn is
loaded with the patented 44XT high
efficiency compression driver and a BWX
1008-8 HE high powered mid, designed
specifically for the QW-1. The horn has a
coverage pattern of 60˚ in the horizontal
axis and 40˚ in the vertical axis.
The QW-1 is designed for arraying in flying
applications or stacking on a stage. Twelve
mounting points are located on the unit
for flying applications. Three flying points
are located on the top and bottom, and
two points are on the right and left sides
and the rear of the enclosure.
The QW-1 is constructed with a special
grade of high density 3/4" plywood and
covered with a black Hammer Head hard
coat, a tough finish equivalent to the
durable liners used in truck beds today.
This finish makes the enclosure very road-
worthy, but more importantly the Hammer
Head finish helps to dampen resonant
modes that may develop. These minor,
subtle resonant modes are dampened to
help improve the overall sound quality of
the system.
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This measurement is useful in determining
how accurately a given unit reproduces an
input signal. The frequency response of
the QW-1 is measured at a distance of
1 meter using a 1 Watt swept-sine input
signal (into the nominal impedance). As
shown in Figure 1, the selected drivers in
the QW-1, in conjunction with the Peavey
CEX 5, combine to give a smooth
frequency response from 200 Hz to 18 kHz.
DDiirreeccttiivviittyy
Beamwidth is derived from the -6 dB
points from the polar plots (see Figure 2),
which are measured in a whole space
anechoic environment. Q and Directivity
Index are plotted for the on-axis
measurement position. These
specifications provide a reference to the
coverage characteristics of the unit and
insight into proper placement and
installation in the chosen environment.
The combination of components in the
QW-1 exhibit a desirable beamwidth and
directivity (Figures 2 and 3) suitable for
sound reinforcement applications.
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Peavey rates this loudspeaker system’s
power handling using a full range form of
the AES Standard 2-1984. Using audio
band 20 Hz to 20 kHz pink noise with
peaks of four times the RMS level, our
strenuous testing assures that every
portion of this system can withstand
today’s high technology music. This rating
is contingent upon having a minimum of
3 dB amplifier headroom.
HHaarrmmoonniicc ddiissttoorrttiioonn
Second and third harmonic distortions vs.
frequency are plotted in Figures 4 and 5
for two power levels: ten percent (10%) of
rated input power and either one percent
(1%) of rated input power or 1 Watt,
whichever is greater. Distortion is the
difference between the fundamental
signal (frequency response) and the
desired harmonic. For example, a
distortion curve down 40 dB from the
fundamental is equivalent to 1%
distortion.
2