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Beamwidth, Amplitude response (1w 1m on-axis), Q & directivity index – Peavey SP 1G User Manual

Page 2: Impedance, Figure 3, Figure 1, Qfigure 4, Figure 2

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Net Weight:

95 lbs. (43.2 kg)

FEATURES
• 1505-8 KADT Black Widow

®

woofer

• 44XT

compression driver

• Trapezoidal enclosure design
• SA-1

stand mount

DESCRIPTION

The SP

1G is a step up to a

higher performance loudspeaker
system within the SP line of enclo-
sures. It is a two-way loudspeaker
consisting of a 15" Black Widow

®

woofer and a 44XT

compression

driver loaded with a CH

®

7 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 trapezoidal design
of the enclosure allows arrays to be
constructed much more easily than
when using a rectangular shaped
box. This shape also greatly
reduces the buildup of standing
waves on the inside of the enclo-
sure. This ensures a minimum of
mid-bass and midrange coloration
of the reproduced sound due to the
cabinet. The SP

1G is constructed

of 3/4" plywood and 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 enclo-
sure to protect the low-frequency
driver from unforeseen accidents.

Sound Guard 44XT

, a version

of Peavey’s proprietary high-
frequency driver protection circuit
designed especially for the 44XT

,

has been included as an integral
part of the crossover for the
SP

1G. The input signal is routed

through the Sound Guard 44XT

circuit in both full-range and bi-amp
modes of operation. When the high-
frequency drive level to the SP

1G

exceeds a predetermined threshold,
the Sound Guard 44XT

circuit is

engaged. This is achieved at
approximately 90% full-rated power
with most program material. The
effect that this has is to
decrease the signal level going
to the 44XT

by about 6 dB so that

it will not be damaged due to long
term (thermal) overpowering. Short
duration transients will not be
attenuated by Sound Guard 44XT

and have the possibility to damage
the 44XT

.

20

50

100

200

500

1k

2k

5k

10k

20k

Frequency (Hz)

30

40

60

80

100

140

180

300

360

Beamw

id

th(

Degrees

)

Beamwidth

Vertical

Horizontal

Figure 3

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

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