Peavey SP 7G User Manual
SPECS
PEAVEY ELECTRONICS
SP
™
7G
Sound Reinforcement
Enclosure with 44XT
™
SPECIFICATIONS
Frequency Response, 1 meter on-axis,
swept-sine in anechoic environment:
50 Hz to 18 kHz (±3 dB)
Usable Low Frequency Limit (-10 dB
point):
39 Hz
Power Handling:
Full Range:
600 W continuous (49.0 V RMS)
1,200 W program
2,400 W peak
Passive Low/Mid Frequency Section:
700 W continuous (52.9 V RMS)
1,400 W program
2,800 W peak
High Frequency Section:
80 W continuous (25.3 V RMS)
160 W program
320 W peak
Sound Pressure Level, 1 Watt, 1 meter
in anechoic environment:
Full Range:
99.0 dB SPL, (2.00 V input)
Low/Mid Frequency Section:
99.0 dB SPL, (2.00 V input)
High Frequency Section:
108.0 dB SPL, (2.83 V input)
Maximum Sound Pressure Level
(1 meter):
Full Range:
126.8 dB SPL continuous
132.8 dB SPL peak
Low/Mid Frequency Section:
127.5 dB SPL continuous
133.5 dB SPL peak
High Frequency Section:
127.0 dB SPL continuous
133.1 dB SPL peak
Radiation Angle, measured at -6 dB
point of polar response:
500 Hz to 1.6 kHz:
Horizontal 90˚+/- 10˚
Vertical 105˚ +/- 25˚
1.6 kHz to 5 kHz:
Horiz. 90˚ +/- 10˚
Vert. 65˚ +/- 30˚
5 kHz - 16 kHz:
Horiz. 55˚ +/- 15˚
Vert. 40˚ +/- 5˚
Directivity Factor, Q (Mean):
14.89 +/- 10.51
Directivity Index, Di (Mean):
10.86 dB +/- 2.70 dB
Transducer Complement:
Low Frequency Section:
1 x 15in. Woofer, Vented
1505-8KADT Black Widow
Mid Frequency Section:
1 x 15in. Woofer, Vented
1505-8KADT Black Widow
®
High Frequency Section:
1.6 in. Exit / 100mm Voice Coil 44XT
™
Compression Driver on CH® 7 CD
Horn
Box Tuning Frequency:
Low Frequency Section: 50 Hz
Crossover Frequency (internal
passive):
Low Frequency - Mid Frequency:
350 Hz
Mid Frequency - High Frequency:
2,000 Hz
Recommended Active Crossover
Frequency Region and Slope:
Mid Frequency - High Frequency:
1,200 Hz at 18 dB/octave
Time Offset:
Low Frequency: 0.00 ms
High Frequency: 0.70 ms
Impedance (Z):
Full Range:
Nominal: 4.0 Ω
Minimum: 3.9 Ω
Passive LF/MF:
Nominal: 4.0 Ω
Minimum: 3.9 Ω
High Frequency:
Nominal: 8.0 Ω
Minimum: 8.0 Ω
Input Connections:
2x 1/4" input jacks, 2x 1/4" biamp jacks
Enclosure Materials and Finish:
3/4" OSB, Finished in Black Carpet
Dimensions (H x W x D):
Front:
53.50 in. x 21.50 in. x 27.50 in.
1359 mm x 546 mm x 699 mm
Rear
:
53.50 in. x 13.13 in. x 27.50 in.
1359 mm x 333 mm x 699 mm
Net Weight:
149 Lbs. (67.7 kg)
Features
• Two 1505-8KADT Black Widow woofers
• 44XT™compression driver
• Sound Guard™44XT™high frequency
protection circuit
• Trapezoidal enclosure design
• Built-in pocket casters for easy transport
DESCRIPTION
The Peavey SP™7G is a newly
designed quasi-three-way speaker system
comprised of two 15" Black Widow
woofer/midrange, and a 44XT compression driver coupled to a CH 7 constant
directivity horn.
As with all SP full-range speakers,
this unit can be driven in full-range or
biamp mode simply by plugging into the
desired jack on the input plate. The SP 7G
has a trapezoidal shaped cabinet, rather
than the more traditional rectangular
shape. This allows cabinet arrays to be
constructed more easily. This shape also
greatly reduces the build-up of internal
standing waves. Standing waves are internal amplitude peaks that occur due to
reflections within the cabinet at frequencies related to the internal square dimensions of the cabinet. The trapezoidal
shape resists the formation of standing
waves by causing the internal reflections
to cancel rather than reinforce each other.
This ensures a minimum of mid-bass and
mid-range coloration of the reproduced
sound due to standing waves within the
cabinet.
The SP 7G is constructed of very high
quality 3/4" Oriented Strand Board (OSB),
which is a void-free, medium density, and
wood-species specific material. (This
material should not be confused with lesser quality materials which possess internal
properties of OSB, and are commonly
known as “chip-board” or “wafer-board”.
These chip- or wafer-board materials use
inferior wood species, or a mixture of
species which compromise strength, have
poor screw-retention, and have low-resistance to warpage.) The SP 7G OSB cabinet is finished with Peavey’s durable black
carpet. Polymer corners are also added to
provide further protection to the cabinet.
A powder-coated expanded metal grill
covers the lower section of the front of the
cabinet to protect the low-frequency drivers from unforeseen impacts.
Sound Guard 44XT, Peavey’s proprietary circuit for high frequency driver protection, has ben included as an integral
part of the cross-over for the SP 7G. The
input signal is routed through the Sound
Guard 44XT circuit in both full-range and
biamp modes of operation. When the high
frequency drive level to the SP 7G
exceeds a predetermined threshold, the
Sound Guard 44XT circuit is engaged.
This subtly decreases the signal level
going to the 44XT so that it will not be
damaged due to long term over-powering.
Short duration transients will not be attenuated by Sound Guard 44XT and have the
potential to damage the 44XT driver. The
Sound Guard 44XT circuit is dynamic
in operation, and will only attenuate the
signal more in relation to the amplitude of
the signal, very similar to a compressor.
This is accomplished through the use of a
dynamically resistive component in conjunction with the non-linear resistance
characteristics of a specific tungsten light
bulb. Should the bulb in your Sound
Guard 44XT ever burn out, a replacement
may be obtained from an Authorized
Peavey Service Center. However, if a
Peavey replacement bulb is not readily
available, then an automotive type 1156
bulb may be temporarily substituted.
FREQUENCY RESPONSE
This measurement is useful in
determining how accurately a given unit
reproduces an input signal. The frequency
response of the SP 7G 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 SP 7G combine to give a
smooth frequency response from 50 Hz to
18 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
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 SP 7G 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
Electronics rates this unit’s system power
handling using a modified form of the AES
Standard 2-1984. 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 50 Hz to 18
kHz. The nominal output level shall be
99.0 dB when measured at a distance of
one meter with an input of one watt. The
nominal impedance shall be 4.0 ohms.
The maximum continuous power handling
shall be 600 watts, maximum program
power of 1,200 watts and a peak power
input of at least 2,400 watts, with a minimum amplifier headroom of 3 dB. The
nominal radiation geometry shall be 75
degrees in the horizontal plane and 65
degrees in the vertical plane. The outside
dimensions shall be 53.50 inches high by
21.50 inches wide by 27.50 inches deep.
The weight shall be 149 pounds. The
loudspeaker system shall be a Peavey
model SP 7G.
2
20 50 100 200 500 1k 2k 5k 10k 20k
Frequency (Hz)
60
70
80
90
100
110
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
2
3
5
10
20
30
50
100
Impedance
Z
(
)
Figure 2
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)
1
10
100
Q & Directivity Index
Q
Figure 4
20
10
Di
0
3
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