Peavey ILS 1594 DATASHEET
Frequency Response, 1 Meter
On-axis, Swept-sine in Anechoic
Environment:
52 Hz - 20 kHz (±3 dB)
Usable Low Frequency Limit
(-10 dB point):
40 Hz
Power Handling:
Full Range:
750W continuous
1,500W program
3,000W peak
Low Frequency Section:
600W continuous
1,200W program
2,400W peak
High Frequency Section:
100W continuous
200W program
400W peak
Sound Pressure Level, 1 Watt, 1
Meter in Anechoic Environment:
Full Range:
95.0 dB SPL, (2.83V input)
Low Frequency Section:
98.0 dB SPL, (2.83V input)
High Frequency Section:
107.0 dB SPL, (2.83V input)
Maximum Sound Pressure Level
(1 meter):
Full Range
:
123.8 dB SPL continuous
129.8 dB SPL peak
Low Frequency Section:
125.8 dB SPL continuous
131.8 dB SPL peak
High Frequency Section:
127.0 dB SPL continuous
133.0 dB SPL peak
Radiation Angle Measured at -6dB
Point of Polar Response:
500 Hz – 1.6 kHz:
Horiz. 90° +/- 15°
Vert. 105° +/- 15°
1.6 kHz - 5 kHz:
Horiz. 90° +/- 15°
Vert. 55° +/- 10°
5 kHz - 16 kHz:
Horiz. 70° +/- 10°
Vert. 40° +/- 5°
Directivity Factor, Q (Mean):
12.04 +/- 5.66
Directivity Index, Di (Mean):
10.29 dB +/- 2.19 dB
Transducer Complement:
Low Frequency Section:
1x 15 in. Woofer, Vented
1508-8 Cu
High Frequency Section:
1x 1.6 in. exit/100mm voice coil
compression driver on Quadratic
Throat Waveguide
™
44 XT (w/o adapter) on a CH-942qt
Box Tuning Frequency:
Low Frequency Section:
50 Hz
Harmonic Distortion:
1% Rated Power
2nd Harmonic:
100 Hz: 1.15%
1 kHz: 0.32%
SPECIFICATIONS
ILS™1594
3rd Harmonic:
100 Hz: 0.26%
1 kHz: 0.45%
10% Rated Power
2nd Harmonic:
100 Hz: 4.60%
1 kHz: 1.59%
3rd Harmonic:
100 Hz: 1.04%
1 kHz: 0.64%
Crossover Frequency
(internal passive):
Low Frequency - High Frequency:
1,300 Hz
Time Offset:
Low Frequency: 0.00 ms
High Frequency: 0.31 ms
Impedance (Z):
Full Range:
Nominal: 8.0 Ω
Minimum: 7.1 Ω
Low Frequency:
Nominal: 8.0 Ω
Minimum: 7.4 Ω
High Frequency:
Nominal: 8.0 Ω
Minimum: 6.0 Ω
Input Connections:
2x Neutrik®Speakon®NL4MD &
1x 5-position barrier strip
Enclosure Materials & Finish:
3/4 in. poplar plywood finished in
exterior grade hardened black
paint
Mounting Provisions:
(12) 3/8"-16 threaded mounting
suspension points (3 each top &
bottom and 2 each sides & 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
110
100
dB SPL (re 20 Pa)
Amplitude Response (1W 1m On-Axis)
90
80
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 1594 V
Horizontal
Vertical
Frequency (Hz)
Beamwidth
360
300
180
140
100
80
60
40
Beamwidth (Degrees)
30
Horizontal
Vertical
20 50 100 200 500 1k 2k 5k 10k 20k
Figure 3b - ILS 1594 H
Frequency (Hz)
3
Features
• 50 Hz to 20 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
• Hotel Meeting Rooms
• Conference Facilities
• Theaters
• Auditoriums
• Civic Centers
• Judicial Facilities
• Gymnasiums
• Performing Arts Centers
Description
The new Peavey ILS 1594V (vertical)
and ILS 1594H (horizontal) loudspeaker
systems are two-way, vented, low
frequency enclosures using a 15" low
frequency driver paired with a 90°
(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 1594H
unit, the waveguide is rotated to provide
a corresponding beamwidth which may
be employed in low ceiling type
applications. Both versions of the ILS
1594 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 1594 is a high
performance loudspeaker system for
use in demanding sound reinforcement
applications. The robust construction of
the ILS 1594 provides power handling
capacities of 750W continuous, 1.5 kW
program and 3 kW peak (full range).
The unit may be operated using the
internal 1,300 Hz passive crossover or
Q & Directivity Index
100
Q
10
1
20 50 100 200 500 1k 2k 5k 10k 20k
Figure 4
Frequency (Hz)
20
Di
10
0
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
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" x 16
threaded mounting suspension points
(3 each top and bottom and 2 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
1594 are solidly constructed of 3/4"
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 1594 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 1594 combine to
give a smooth frequency response
from 52 Hz - 20 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
1594 exhibit a desirable beamwidth
and directivity (figure 3 & 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
& 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. The
speaker can fall from improper
suspension, resulting in serious injury
and property damage. Other
enclosures may be suspended below
one ILS 1594. However, the combined
weight of additional enclosures and all
cables, clamps and other hardware
must not exceed 304 pounds. The ILS
1594 weighs 96 pounds and the
maximum combined weight
suspended from the uppermost
mounting bracket assemblies must
not exceed 400 pounds. Maximum
enclosure angle is 45°. Use only the
correct mating hardware. All
associated rigging is the responsibility
of others.
Architectural & Engineering
Specifications
The loudspeaker system shall have
an operating bandwidth of 52 Hz 20kHz. 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 80 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 1594.
This product is manufactured under
U.S. patents 6,059,069 and
6,064,745.
Three + Two 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 2898, 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 1594H
Horizontal Polar Patterns 6 dB per Division
5
o
0
o
30
o
60
o
90
o
-30
o
-60
o
-90
30
o
60
o
90
o
0
o
30
o
60
o
90
o
-30
o
-60
o
-90
90
o
30
o
60
o
0
o
o
0
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
30
o
30
o
o
0
o
o
0
o
o
-30
o
-60
o
-90
o
-30
o
-60
o
-90
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