Peavey ILS 1564 User Manual
Frequency Response, 1 meter
on-axis, swept-sine in anechoic
environment:
47 Hz - 18.5 kHz (±3 dB)
Usable Low Frequency Limit
(-10 dB point):
38 Hz
Power Handling:
Full Range:
750 w continuous
1,500 w program
3,000 w peak
Low Frequency Section:
600 w continuous
1,200 w program
2,400 w peak
High Frequency Section:
100 w continuous
200 w program
400 w peak
Sound Pressure Level, 1 Watt, at
1 meter in anechoic
environment:
Full Range:
95.0 dB SPL, (2.83 V input)
Low Frequency Section:
98.0 dB SPL, (2.83 V input)
High Frequency Section:
109.0 dB SPL, (2.83 V input)
Maximum Sound Pressure Level
(1 meter):
Full Range:
124.0 dB SPL continuous
130.1 dB SPL peak
Low Frequency Section:
125.8 dB SPL continuous
131.8 dB SPL peak
High Frequency Section:
129.0 dB SPL continuous
135.0 dB SPL peak
Radiation Angle, measured at
-6 dB point of polar response:
500 Hz – 1.6 kHz:
Horiz. 95o± 20
o
Vert. 100o± 10
o
1.6 kHz - 5 kHz:
Horiz. 95o± 20
o
Vert. 50o± 15
o
5 kHz - 16 kHz:
Horiz. 55o± 5
o
Vert. 35o± 5
o
Directivity Factor, Q (Mean):
16.35 ± 9.58
Directivity Index, Di (Mean):
11.25 dB ± 2.93 dB
Transducer Complement:
Low Frequency Section:
1x 15 in. Woofer, Vented
1508-8 Cu
High Frequency Section:
1x 1.6 in. Exit/100 mm Voice Coil
Compression Driver on Quadratic
Throat Waveguide
44 XT (w/o adapter) on CH-642qt
Box Tuning Frequency:
Low Frequency Section: 50 Hz
Harmonic Distortion:
1% rated power
2nd Harmonic:
100 Hz: 1.34%
1 kHz: 0.24%
SPECIFICATIONS
ILS™1564
3rd Harmonic:
100 Hz: 0.27%
1 kHz: 0.51%
10% rated power
2nd Harmonic:
100 Hz: 6.58%
1 kHz: 0.87%
3rd Harmonic:
100 Hz: 1.14%
1 kHz: 0.78%
Crossover Frequency (internal
passive): Low Frequency - High
Frequency:
1,600 Hz
Time Offset:
Low Frequency: 0.00 ms
High Frequency: 0.74 ms
Impedance (Z):
Full Range:
Nominal: 8.0 Ω
Minimum: 7.6 Ω
Low Frequency:
Nominal: 8.0 Ω
Minimum: 7.8 Ω
High Frequency:
Nominal: 8.0 Ω
Minimum: 7.9 Ω
Input Connections:
2x Neutrik®Speakon®NL4MD and
1x five-position barrier strip
Enclosure Materials and Finish:
3/4 in. Poplar Plywood Finished in
Exterior Grade Hardened Black
Paint
Mounting Provisions:
(12) 3/8"-16 threaded mounting
suspension points (three each top
and bottom and two each sides
and back). Use only forged
shoulder machinery eye bolt, Mil
Spec MIL51937-3.
Dimensions (H x W x D):
Front:
33.75 in. x 19.38 in. x 21.75 in.
857 mm x 492 mm x 552 mm
Rear:
33.75 in. x 8.63 in. x 21.75 in.
857 mm x 219 mm x 552 mm
Net Weight:
96 lbs. (43.6 kg)
2
Amplitude Response (1W 1m On-Axis)
110
100
90
80
dB SPL (re 20 Pa)
70
60
20 50 100 200 500 1k 2k 5k 10k 20k
Figure 1
Frequency (Hz)
Impedance
100
50
30
20
Z
(
)
10
5
3
2
1
20 50 100 200 500 1k 2k 5k 10k 20k
Figure 2
Frequency (Hz)
Beamwidth
360
300
180
140
100
80
60
40
Beamwidth (Degrees)
30
20 50 100 200 500 1k 2k 5k 10k 20k
Figure 3a - ILS 1564 V
Horizontal
Vertical
Frequency (Hz)
Beamwidth
360
300
180
140
100
80
60
40
Beamwidth (Degrees)
30
20 50 100 200 500 1k 2k 5k 10k 20k
Figure 3b - ILS 1564 H
Horizontal
Vertical
Frequency (Hz)
3
Features
• 47 Hz to 18.5 kHz bandpass
• 4" diaphragm, 1.6" exit, ferrofluid
equipped high frequency compression
driver
• Patented Quadratic Throat Waveguide
• Carefully tailored directivity patterns
• Flexible suspension provisions
• Robust power handling capabilities
• Passive crossover included
• Biamplified crossover provisions
Applications
• Stadiums
• Arenas
• Multi-purpose facilities
• Cruise ships
• Theme parks
• Houses of worship
• Live music venues
• Hotels meeting rooms
• Conference facilities
• Theaters
• Auditoriums
• Civic centers
• Judicial facilities
• Gymnasiums
• Performing arts centers
Description
The new Peavey ILS 1564V (vertical)
and ILS 1564H (horizontal) Loudspeaker Systems are two-way, vented
low frequency enclosures using a 15
inch low frequency driver paired with a
60° (horizontal) by 40° (vertical) high
frequency waveguide. The HF section
employs a 1.6 exit/100 mm voice coil
compression driver mounted on one of
Peavey’s revolutionary new Quadratic
Throat Waveguides. In the ILS 1564H
unit, the waveguide is rotated to provide
a corresponding beamwidth which may
be employed in low ceiling type
applications. Both versions of the ILS
1564 have a full range sensitivity of
95 dB SPL – (1 watt/1 meter) and a
maximum output of 130 dB at 1 meter
(full range).
The Peavey ILS 1564 is a high
performance loudspeaker system for
use in demanding sound reinforcement
applications. The robust construction of
the ILS 1564 provides power handling
capacities of 750 w continuous, 1.5 kW
program and 3 kW peak (full range).
The unit may be operated using the
internal 1,600 Hz passive crossover or
Q
100
10
Q & Directivity Index
20
Di
10
1
20 50 100 200 500 1k 2k 5k 10k 20k
Figure 4
Frequency (Hz)
Harmonic Distortion : 10% Rated Power
120
110
100
90
80
70
dB SPL (re 20 Pa)
60
50
20 50 100 200 500 1k 2k 5k 10k 20k
Figure 5
Frequency (Hz)
2nd Harmonic
3rd Harmonic
Harmonic Distortion : 1% Rated Power
110
100
90
80
0
70
60
dB SPL (re 20 Pa)
50
40
20 50 100 200 500 1k 2k 5k 10k 20k
Figure 6
Frequency (Hz)
2nd Harmonic
3rd Harmonic
4
may be biamplified. Twelve 3/8 inch x
16 threaded mounting suspension
points (three each top and bottom and
two each sides and back) allow a
variety of suspension configurations.
Multiple units may be mounted to form
a vertical/horizontal array [see
limitations under mounting
instructions]. Both versions of the
ILS 1564 are solidly constructed of
3/4 inch void free poplar plywood and
finished with an exterior grade
hardened black paint.
Frequency Response
This measurement is useful in
determining how accurately a given
unit reproduces an input signal. The
frequency response of the ILS 1564
is measured at a distance of 1-meter
using a 1 watt (into the nominal
impedance) swept-sine input signal.
As shown in Figure 1, the selected
drivers in the ILS 1564 combine to
give a smooth frequency response
from 47 Hz - 18.5 kHz.
Directivity
Beamwidth is derived from the -6 dB
points from the polar plots (see Figure
3) which are measured in a whole
space anechoic environment. Q and
Directivity Index are plotted for the onaxis measurement position. These are
specifications that provide a reference
to the coverage characteristics of the
unit. These parameters provide insight
for proper placement and installation
in the chosen environment. The
blending of the components of the ILS
1564 exhibit a desirable beamwidth
and directivity (Figure 3 and 4)
suitable for sound reinforcement
applications.
Power Handling
There are many different approaches
to power handling ratings. 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,
this strenuous test signal assures the
user that every portion of this system
can withstand today’s high technology
music. This rating is contingent upon
having a minimum of 3 dB of amplifier
headroom available.
Harmonic Distortion
Second and third harmonic distortions
vs. frequency are plotted in Figures 5
and 6 for two power levels. Ten
percent (10%) of rated input power
and either one percent (1%) of rated
input power or one watt, whichever is
greater. Distortion is read from the
graph as the difference between the
fundamental signal (frequency
response) and the desired harmonic.
As an example, a distortion curve that
is down 40 dB from the fundamental
is equivalent to 1% distortion.
Mounting
CAUTION: Before attempting to
suspend this speaker, consult a
certified structural engineer. Speaker
can fall from improper suspension,
resulting in serious injury and property
damage. Other enclosures may be
suspended below one ILS 1564.
However, the combined weight of
additional enclosures and all cables,
clamps and other hardware must not
exceed 304 pounds. The ILS 1564
weighs 96 pounds and the maximum
combined weight suspended from the
uppermost mounting bracket
assemblies must not exceed 400
pounds. Maximum enclosure angle
45 degrees. Use only the correct
mating hardware (forged shoulder
machinery eye bolt, Mil Spec
MIL51937-3). All associated rigging
is the responsibility of others.
Architectural and Engineering
Specifications
The loudspeaker system shall have
an operating bandwidth of 47 Hz -
18.5 kHz. The nominal output level
shall be 95.0 dB when measured at a
distance of one meter with an input of
one watt. The nominal impedance
shall be 8.0 ohms. The maximum
continuous power handling shall be
750 watts, maximum program power
of 1,500 watts and a peak power input
of at least 3,000 watts, with a
minimum amplifier headroom of 3 dB.
The nominal radiation geometry shall
be 70 degrees in the horizontal plane
and 65 degrees in the vertical plane.
The outside dimensions shall be
33.75 inches high by 19.38 inches
wide by 21.75 inches deep. The
weight shall be 96 pounds. The
loudspeaker system shall be an
Architectural Acoustics model
ILS 1564.
This product is manufactured under
U.S. patents 6,059,069 and
6,064,745.
3 + 2 YEAR LIMITED WARRANTY
NOTE:
For details, refer to the
warranty statement. Copies of
this statement may be obtained
by contacting Peavey Electronics
Corporation, P.O. Box Meridian,
Mississippi 39301-2898.
Neutrik®and Speakon®are registered trademarks of Neutrik AG.
200 Hz
315 Hz
500 Hz
800 Hz
1.25 kHz
1 kHz
1.6 kHz
2.5 kHz
2 kHz
250 Hz
400 Hz
630 Hz
ILS 1564H
Horizontal Polar Patterns 6 dB per Division
5
o
0
o
30
o
60
o
90
o
-30
o
-60
o
-90
90
o
30
o
60
o
o
0
o
30
o
60
o
90
o
-30
o
-60
o
-90
30
o
60
o
90
0
0
o
o
o
o
-30
o
-60
o
-90
o
-30
o
-60
o
-90
30
o
60
o
90
30
o
60
o
90
o
o
o
0
o
0
o
-30
o
-60
o
-90
o
-30
o
-60
o
-90
o
o
o
30
o
30
o
0
o
0
o
-30
o
-60
o
-90
o
-30
o
-60
o
-90
60
o
90
60
o
90
o
0
o
30
o
60
o
90
o
-30
o
-60
o
-90
60
o
90
o
0
o
30
o
60
o
90
o
-30
o
-60
o
-90
60
o
90
o
30
o
o
30
o
o
0
o
0
o
-30
o
-60
o
-90
o
-30
o
-60
o
-90
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