Page 1
P E A V E Y E L E C T R O N I C S
SPECS
SP™ 3G
Sound Reinforcement
Enclosure with
Sound Guard
Protection System
SPECIFICATIONS
Frequency Response, 1 Meter
On-Axis, Swept-Sine in Anechoic
Environment:
54 Hz to 17 kHz
Low-Frequency Cut-Off (-3 dB point):
54 Hz
Usable Low-Frequency Limit
(-10 dB point):
47 Hz
Power Handling:
Full-Range:
350 W continuous (52.9V RMS)
700 W program
1,400 W peak
Bi-amp Low:
350 W continuous (52.9 V RMS)
700 W program
1,400 W peak
Bi-amp High:
150 W continuous (34.6 V RMS)
300 W program
600 W peak
Sound Pressure Level, 1 Watt, 1
Meter in Anechoic Environment:
Full-Range: 99 dB (2.8 V)
Bi-amp Low: 100 dB (2.8 V)
Bi-amp High: 99 dB (2.8 V)
Maximum Sound Pressure Level
(1 meter):
Full-Range:
125 dB continuous
131 dB peak
Bi-amp Low:
126 dB continuous
132 dB peak
Bi-amp High:
120 dB continuous
127 dB peak
Radiation Angle Measured at -6 dB
Point of Polar Response:
500 Hz to 1.6 kHz:
Horizontal: 122° ±-15°
Vertical: 152° ±-38°
™
HF
1.6 kHz to 5 kHz:
Horizontal: 79° ±21°
Vertical: 83° ±22°
5 kHz to 16 kHz:
Horizontal: 87° ±10°
Vertical: 45° ±4°
Directivity Factor, Q (Mean):
8 ±4.3
Directivity Index, Di (Mean):
8.3 dB ±2.8 dB
Transducer Complement:
1505-8 KADT Black Widow® woofer
6.5" Pro mid-range driver
22XT compression driver
Box Tuning Frequency:
58 Hz
Crossover Frequency (internal
passive):
800 Hz
Minimum Recommended Active
Crossover Frequency and Slope for
Bi-amping:
800 Hz at 18 dB/octave
Time Offset:
0.14 mS (delay Lows)
Impedance (Z):
Full-Range Nominal: 8 Ω
Full-Range Minimum: 5.3 Ω
Lows Nominal: 8 Ω
Highs Nominal: 8 Ω
Input Connections:
Two paralleled 1/4" phone jacks for
full-range
One 1/4" phone jack for bi-amp low
One 1/4" phone jack for high and mid bi-
amp
Enclosure Materials & Finish:
3/4" plywood enclosure covered with black
carpet and protective polymer corners
Expanded metal grille to protect the mid
and low drivers
Mounting Provisions:
One SA-1 stand mount on bottom of
enclosure.
Dimensions (H x W x D):
33.50" x 21.50" x 22.50"
(85.1 cm x 54.6 cm x 57.1 cm)
Rear width 14.25" (36.1 cm)
®
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NET WEIGHT:
20 50 100 200 500 1k 2k 5k 10k 20k
Frequency (Hz)
30
40
60
80
100
140
180
300
360
Beamwidth (Degrees)
Beamwidth
Vertical
Horizontal
Figure 3
20 50 100 200 500 1k 2k 5k 10k 20k
Frequency (Hz)
70
80
90
100
110
120
dB SPL (re 20 Pa)
Amplitude Response (1W 1m On-Axis)
Figure 1
20 50 100 200 500 1k 2k 5k 10k 20k
Frequency (Hz)
1
10
100
Q & Directivity Index
Q
Figure 4
20
10
Di
0
20 50 100 200 500 1k 2k 5k 10k 20k
Frequency (Hz)
1
2
3
5
10
20
30
50
100
Impedance
Z
(
)
Figure 2
95 lbs. (43.2 kg)
FEATURES
• 1505-8 KADT Black Widow
• 6.5" Pro mid-range driver
• 22 XT compression driver
• Sound Guard high-frequency
protection circuit
• Trapezoidal enclosure design
DESCRIPTION
The SP 3G is a full-range 3-way
speaker system engineered for high
performance and versatility. Useful
for sound reinforcement, monitoring,
public address and musical playback. The system is comprised of a
15" Black Widow woofer with
Kevlar-impregnated cone, a 6.5"
professional mid-range driver, and a
22XT compression driver coupled
with a CH 3 constant directivity
horn.
This unit can be driven in a fullrange or bi-amp mode by simply
plugging into the desired jack on the
input plate. The SP 3G has a
trapezoidal shaped box, rather than
a rectangular shaped box, that
allows arrays to be constructed
much more easily. This shape also
greatly reduces the build-up of
standing waves on the inside of the
enclosure. This ensures a minimum
of mid-bass and mid-range coloration of the reproduced sound due to
the cabinet. The SP 3G is constructed of 3/4" plywood and is
covered with Peavey's durable black
carpet. Polymer corners are also a
part of the unit to provide added
protection to the enclosure. A
powder-coated, expanded metal
grille covers the lower part of the
front of the enclosure to protect the
mid- and low-frequency drivers from
unforeseen accidents.
Sound Guard, Peavey's proprietary circuit for high-frequency
driver protection, has been included
as a integral part of the crossover
for the SP 3G. The input signal is
routed through the Sound Guard
circuit in both full-range and bi-amp
modes of operation. When the highfrequency drive level to the SP 3G
exceeds a predetermined threshold,
the Sound Guard circuit is engaged.
This subtly decreases the signal
going to the 22XT so that it will not
be damaged due to long-term
overpowering. Short duration
transients will not be attenuated by
Sound Guard and have the possibility to damage the 22XT. The Sound
Guard circuit is a dynamic circuit
®
woofer
Page 3
-90
o
-60
o
-30
o
0
o
30
o
60
o
90
o
-90
o
-60
o
-30
o
0
o
30
o
60
o
90
o
HORIZONTAL POLAR PATTERNS
0
o
30
o
60
o
90
o
-30
o
-60
o
-90
o
-90
o
-60
o
-30
o
0
o
30
o
60
o
90
o
-90
o
-60
o
-30
o
0
o
30
o
60
o
90
o
0
o
30
o
60
o
90
o
-30
o
-60
o
-90
o
1 octave averaged, plotted on ISO 1 octave centers from 500 Hz to 16 kHz
o
0
o
30
o
-30
o
60
o
90
o
0
o
30
o
60
o
90
4 kHz
o
-60
o
-90
1 kHz500 Hz
o
-30
o
-60
o
-90
8 kHz
2 kHz
16 kHz
VERTICAL POLAR PATTERNS
1 octave averaged, plotted on ISO 1 octave centers from 500 Hz to 16 kHz
o
90
o
-90
500 Hz
90
o
60
o
30
o
0
o
-30
o
-60
1 kHz
o
o
60
o
30
o
0
o
90
o
-90
o
60
o
30
o
0
o
-30
o
-60
2 kHz
o
90
o
60
o
30
o
0
o
4 kHz
o
-90
-30
o
-60
o
-90
8 kHz
o
-30
o
-60
16 kHz
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that will attenuate the signal more
80300490
the larger the signal is, very similar
to a compressor. This is accomplished through the use of a specially selected dynamically resistive
light bulb. If the bulb in your Sound
Guard should ever burn out, a
replacement may be obtained from
an Authorized Peavey Service
Center. However, if a Peavey
replacement bulb is not readily
available, an automotive type 1156
bulb can be substituted for temporary use until a Peavey bulb can be
obtained.
FREQUENCY RESPONSE
This measurement is useful in
determining how accurately a given
unit reproduces an input signal.
The frequency response of the SP
3G is measured at a distance of 1
meter using a 2.8 volt swept-sine
input signal. As shown in Figure 1,
the selected drivers in the SP 3G
combine to give a smooth frequency
response from 54 Hz to 17 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 on-axis
measurement position. These are
specifications which 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 SP 3G exhibits a
desirable beamwidth and directivity
(Figures 3 and 4) suitable for sound
reinforcement applications.
POWER HANDLING
There are many different
approaches to power handling ratings.
Peavey Electronics rates this unit's
system power handling using a
modified form of the AES Standard 21984, utilizing audio band limited (20
Hz - 20 kHz) pink noise with peaks over
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. The test signal contains large
amounts of very low-frequency energy,
effectively simulating the frequency
content of live music situations. The
full measure of high frequencies in the
test signal allow for exposure of the
speaker system to synthesized tones
that may extend beyond audibility. This
rating is contingent on having a
minimum of 3 dB of amplifier headroom
available so as to ensure that clipping
does not occur.
ARCHITECTURAL & ENGINEERING
SPECIFICATIONS
The loudspeaker system shall have
an operating bandwidth of 54 Hz to 17
kHz. The nominal output level shall be 99
dB when measured at a distance of one
meter with an input of one watt. The
nominal impedance shall be 8 ohms. The
maximum continuous power handling shall
be 350 watts, maximum program power
of 700 watts and a peak power input of at
least 1,400 watts, with minimum amplifier
headroom of 3 dB. The nominal radiation
geometry shall be 96 degrees in the
horizontal plane and 95 degrees in the
vertical plane. The outside dimensions
shall be 33.50 inches high by 21.50 inches
wide by 22.50 inches deep. The weight
shall be 95 pounds. The loudspeaker
system shall be a Peavey model SP 3G.
ONE 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 39302-2898.
®
Features and specifications subject to change without notice.
Peavey Electronics Corporation 711 A Street / Meridian, MS 39301 / U.S.A. / (601) 483-5365 / Fax 486-1278
©1997 Printed in U.S.A. 5/97
TM
®
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