Peavey SP 4G User Manual

P E A V E Y E L E C T R O N I C S

SPECS

SP™ 4G

Sound Reinforcement
Enclosure with
Sound Guard™ HF
Protection System

SPECIFICATIONS

Frequency Response, 1 Meter
On-Axis, Swept-Sine in Anechoic
Environment:

50 Hz to 17.5 kHz

Low Frequency Cut-Off (-3 dB point):

50 Hz

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

Bi-amp Low:
700 W continuous (52.9 V RMS)
1,400 W program
2,800 W peak

Bi-amp High:
40 W continuous (17.9 V RMS)
80 W program
160 W peak

Sound Pressure Level, 1 Watt, 1
Meter in Anechoic Environment:

Full Range: 100 dB (2.0 V)
Bi-amp Low: 100 dB (2.0 V)
Bi-amp High: 106 dB (2.8 V)

Maximum Sound Pressure Level
(1 meter):

Full Range:
127 dB continuous
133 dB peak

Bi-amp Low:
128 dB continuous
134 dB peak

Bi-amp High:
122 dB continuous
128 dB peak

Radiation Angle Measured at -6 dB
Point of Polar Response:

500 Hz to 1.6 kHz:
Horizontal: 92° ±13°
Vertical: 83° ±13°

1.6 kHz to 5 kHz:
Horizontal: 83° ±19°
Vertical: 57° ±17°

5 kHz to 16 kHz:
Horizontal: 86° ±3°
Vertical: 39° ±2°

Directivity Factor, Q (Mean):

9.5 ±3.3

Directivity Index, Di (Mean):

9.5 dB ±1.5 dB

Transducer Complement:

Two 1505-8 KADT Black Widow® woofers
One 22XT™ compression driver loaded

by a CH® 941 horn

Box Tuning Frequency:

50 Hz

Crossover Frequency (internal
passive):

1.8 kHz

Minimum Recommended Active
Crossover Frequency and Slope for
Bi-amping:

1.2 kHz at 18 dB/octave

Time Offset:

0.70 mS (delay Lows)

Impedance (Z):

Full Range Nominal: 4 Ω
Full Range Minimum: 3.9 Ω
Lows Nominal: 4 Ω
Highs Nominal: 8 Ω

Input Connections:

Two paralleled 1/4" phone jacks for

full-range input

One 1/4" phone jack for bi-amp low

frequency input

One 1/4" phone jack for bi-amp high

frequency input

Enclosure Materials and Finish:

3/4" plywood enclosure covered with black

carpet and protective polymer corners

Expanded metal grille to protect the low

frequency driver

Mounting Provisions:

None

Dimensions (H x W x D):

49.25" x 21.50" x 22.75"
(125.1 cm x 54.6 cm x 57.8 cm)

Net Weight:

id

h(

)

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

Amplitude Response (1W 1m On-Axis)

110

®

100

dB SPL (re 20 Pa)

90

80

70

DESCRIPTION

The redesign of the ever popular SP™ 4
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® impregnated
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™ circuit in
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™ and have
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

®

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

Degrees

100

t

80
60

Beamw

40
30

20 50 100 200 500 1k 2k 5k 10k 20k

Figure 3

Horizontal
Vertical

Frequency (Hz)

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