Peavey Impulse 1582 - Manual (Page 2)

Dimensions (H x W x D):
29.50" H x 21.50" W x 17.50" D
(rear width 21.50")
74.9 cm x 54.6 cm x 44.5 cm
(rear width 54.6 cm)
Net Weight:
108 lbs. (49.1 kg)
FEATURES
• Bi-amp capability
• High power handling
• Metal guard grille
• 10 gauge steel internal flying points
• 44T
™ titanium dome compression
driver
• Grille color options
• 800 Hz crossover
DESCRIPTION
The new Impulse ™ 1582 is a full range or
bi-ampable two-way enclosure designed
specifically for permanent installation. The
cabinet is constructed of 3/4" Poplar-faced,
high-density plywood, or 18 mm, 13-ply all
Birch void-free plywood. The internal flying
points are reinforced with 10 gauge steel
bracing. The decorative and internal
protective grilles are permanently attached to
the enclosure.
The two-way system is comprised of a
Black Widow 15" woofer, and a 44T
compression driver loaded into a CH-7
constant-directivity horn. The frequency
spectrum can either be divided internally
through the enclosure’s passive crossover
operating at about 800 Hertz, or through an
external active or passive crossover. In either
case, the input lead connection is made
secure through the use of screw terminal
barrier strips for bi-amp operation.
FREQUENCY RESPONSE
This measurement is useful in determining
how accurately a given enclosure reproduces
an input signal. The frequency response of
the Impulse 1582 is measured at 1 meter
using a 2.83 volt swept sine input. As shown
in Figure 1, the selected drivers in the
Impulse 1582 combine to give a smooth
frequency response from 55 Hz to 19 kHz.
DIRECTIVITY
Beamwidth and directivity factors are
derived from the -6 dB points from the polar
plots, which are measured in a whole-space
anechoic environment. These are specifica-
tions that provide a reference to the coverage
characterisitics of the enclosure. These
parameters provide insight for proper
enclosure placement and installation in the
chosen environment. The Impulse 1582
exhibits a desirable beamwidth and directivity
factor suitable for all high-level sound
reinforcement applications.
POWER HANDLING
There are many different approaches to
power handling ratings. Peavey rates this
speaker system’s power handling using a
modified form of the AES Standard 2-1984.
Utilizing audio band (20 Hz to 20 kHz) pink
noise with peaks over four times the RMS
level, this strenuous test signal assures the
100 dB
90 dB
80 dB
Fig. 1
50 Hz 100 Hz 200 Hz 500 Hz 1 kHz 2kHz 5 kHz 10 kHz 20 kHz
Frequency
100 ohm
3.16 ohm
10 ohm
3.16 ohm
Fig. 2
50 Hz 100 Hz 200 Hz 500 Hz 1 kHz 2kHz 5 kHz 10 kHz 20 kHz
Impedance
100 160 250 400 630 1K 1.6K 2.5K 4K 6.3K 10K 16K
125 200 315 500 800 1.25 2 3.15 5 8 12.5
320
160
80
40
Beamwidth vs. Frequency
Horizontal Vertical
Fig. 3
100 160 250 400 630 1K 1.6K 2.5K 4K 6.3K 10K 16K
125 200 315 500 800 1.25 2 3.15 5 8 12.5
20
10
0
Directivity
Di
100
10
1
Q
5
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•
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•
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•
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Fig. 4
2