Net Weight:
135 lbs. (61.4 kg)
FEATURES
•
Two 1505-8 KADT Black Widow
woofers
™
•
22XT
compression driver
™
•
Sound Guard
high frequency
protection circuit
•
Trapezoidal enclosure design
•
Built-in pocket casters for easy
movement
DESCRIPTION
The redesign of the ever popular SP
™
has resulted in the SP
4G loudspeaker
system. It is a pseudo three-way speaker
system comprised of a 15" Scorpion
Plus woofer with a Kevlar
®
cone and a 22XT
™
compression driver
®
coupled to a CH
941 constant directivity
horn.
This unit can be driven in full-range or
bi-amp mode simply by plugging into
the desired jack on the input plate. The
™
SP
4G 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
4G 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 low frequency
driver from unforeseen accidents.
™
Sound Guard
, Peavey's proprietary
circuit for high frequency driver
protection, has been included as an
integral part of the crossover for the
™
SP
4G. The input signal is routed
through the Sound Guard
™
both full-range and bi-amp modes of
operation. When the high frequency
™
drive level to the SP
4G exceeds a
predetermined threshold the Sound
Guard
™
circuit in engaged. This subtly
decreases the signal level 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
the possibility to damage the 22XT
™
The Sound Guard
circuit is a dynamic
circuit that will attenuate the signal
more in relation to how large the signal
is, very similar to a compressor. This is
accomplished through the use of a
specially selected, dynamically resistive
110
®
100
90
80
70
60
20
™
4
Figure 1
®
impregnated
100
50
30
20
Z
( )
10
5
3
2
1
20
Figure 2
360
300
180
140
100
80
60
40
30
20
Figure 3
circuit in
100
Q
™
and have
10
™
.
1
20
Figure 4
Amplitude Response (1W 1m On-Axis)
50
100
200
500
Frequency (Hz)
Impedance
50
100
200
500
Frequency (Hz)
Beamwidth
Horizontal
Vertical
50
100
200
500
Frequency (Hz)
Q & Directivity Index
50
100
200
500
Frequency (Hz)
1k
2k
5k
10k
1k
2k
5k
10k
1k
2k
5k
10k
1k
2k
5k
10k
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20
Di
10
0
20k