Peavey IMPULSE 1282 DATASHEET

S P E C I F I C A T I O N S

IMPULSE

Full Range,
Two-Way
Enclosure

SPECIFICATIONS

Frequency Response, 1 Meter, On­Axis, Swept Sine in Anechoic
Environment:

60 Hz to 18 kHz

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

60 Hz

Usable Low-Frequency Limit (-10 dB
point):

48 Hz

Power Handling:

Full Range:

150 W continuous (34.6 V RMS)
300 W program
600 W peak

Bi-amp Low:

150 W continuous (34.6 V RMS)
300 W program
600 W peak

part number 00332250 eyebolts optional

™

1282

Bi-amp High:

40 W continuous (17.9 V RMS)
80 W program
160 W peak

Sensitivity, 1 watt 1 meter in
anechoic environment:

Full Range:

98 dB SPL

Bi-amp Low:

98 dB SPL

Bi-amp High:

106 dB SPL

Maximum Sound Pressure Level:

Full Range:

120 dB SPL (continuous)
126 dB SPL (peak)

Bi-amp Low:

120 dB SPL (continuous)
126 dB SPL (peak)

Bi-amp High:

118 dB SPL (continuous)
124 dB SPL (peak)

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

500 Hz to 1.6 kHz:

Horizontal: 103° ±16°
Vertical: 90° ±27°

1.6 kHz to 5 kHz:
Horizontal: 81° ±7°
Vertical: 76° ±22°

5 kHz to 16 kHz:

Horizontal: 88° ±7°
Vertical: 50° ±3°

Directivity Factor, Q (Mean):

5.9 dB

Directivity Index, Di (Mean):

7.7 dB

Transducer Complement:

One 12" heavy-duty woofer
One 22XT
constant-directivity horn

™

driver coupled with a CH® 3

Box Tuning Frequency:

48 Hz

Harmonic Distortion:

1/100 rated power
2nd harmonic:

100 Hz: 0.6%
1 kHz: 1%

3rd harmonic:

100 Hz: 0.7%

1 kHz: 1%
1/10 rated power
2nd harmonic:

100 Hz: 2%

1 kHz: 1%
3rd harmonic:

100 Hz: 3.2%

1 kHz: 1.6%

Recommended Active Crossover
Frequency and Slope:
800 Hz minimum at 18 dB/octave

Time Offset:

0.37 mS (delay Lows)
Impedance (Z):

Full Range Nominal: 8Ω
Full Range Minimum: 6.1Ω
Lows Nominal: 8Ω
Highs Minimum: 8Ω

Input Connections:

Full Range: 2-position terminal barrier

strip
Bi-amp: 4-position terminal barrier strip

(barrier strips accept up to 10 ga. wire)

Enclosure Materials & Finish:

Painted finish (illustrated):

3/4", 7-ply Poplar faced high-density,

plywood finished with grey polyurethane

finish

Natural finish:

18 mm, 13-ply Baltic Birch, void-free

plywood (ready for finish of user’s

choice)

TM

®

®

Mounting:

8 Flying points (4 horizontal, 4 vertical),
1/2"-13 female thread.

Dimensions (H x W x D):

23" H x 16 1/2" W x 13 1/8" D

(rear width 16.1/2")

58.4 cm x 41.9 cm x 33.3 cm
(rear width 41.9 cm)

Net Weight:

54 lbs. (24.5 kg)

FEATURES

• Bi-amp capability

• High power handling

• Metal guard grille

• 10 gauge steel internal flying points

• 22XT™ titanium dome compression
driver

• Grille color options

• 800 Hz crossover

DESCRIPTION

The new Impulse

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
heavy-duty 12" woofer, and a 22XT compres­sion driver loaded into a CH 3 constant­directivity 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.

™

1282 is a full range or

FREQUENCY RESPONSE

This measurement is useful in determining

how accurately a given enclosure reproduces
an input signal. The frequency response of
the Impulse 1282 is measured at 1 meter
using a 2.83 volt swept sine input. As shown
in Figure 1, the selected drivers in the
Impulse 1282 combine to give a smooth

frequency response from 60 Hz to 18 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 specifica­tions 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 1282
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

Frequency

100 dB

90 dB
80 dB

50 Hz 100 Hz 200 Hz 500 Hz 1 kHz 2kHz 5 kHz 10 kHz 20 kHz

Impedance

100 ohm

3.16 ohm
10 ohm

3.16 ohm

50 Hz 100 Hz 200 Hz 500 Hz 1 kHz 2kHz 5 kHz 10 kHz 20 kHz

320

160

80

Beamwidth vs. Frequency

40

Horizontal Vertical

125 200 315 500 800 1.25 2 3.15 5 8 12.5

100 160 250 400 630 1K 1.6K 2.5K 4K 6.3K 10K 16K

20

10

Directivity

5

Di

0

125 200 315 500 800 1.25 2 3.15 5 8 12.5

100 160 250 400 630 1K 1.6K 2.5K 4K 6.3K 10K 16K

Fig. 4

Fig. 1

Fig. 2

Fig. 3

100

10

1

Q

2

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
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 synthe­size tones that may extend beyond audibility.
This rating is contingent on having a
minimum 3 dB of amplifier headroom
available.

HARMONIC DISTORTION

Second and third harmonic distortion vs.
frequency are plotted in Figures 5 and 6 for
two power levels. One tenth rated input
power and one hundredth rated input power.
Distortion is read from the graph as the
difference between the fundamental signal
(frequency response) and the desired
harmonic. As an example, a distortion curve
that is down 40 dB from the fundamental is
equivalent to 1% distortion.

MOUNTING:

CAUTION: Before attempting to suspend

this speaker, consult a certified structural
engineer. Speaker can fall from improper
suspension, resulting in serious injury and
property damage. Other enclosures may be
suspended below one Impulse 1282.
However, the combined weight of additional
enclosures and all cables, clamps, and other
hardware must not exceed 147 lbs. The
Impulse 1282 weighs 54 pounds and the
maximum combined weight suspended from
the uppermost mounting bracket assemblies
must not exceed 200 pounds. Maximum
enclosure angle is 45°. Use only 1/2" forged
shoulder machinery eyebolt, mil spec.
MS51937-5, Peavey part number 00332250.
All associated rigging is the responsibility of
others.

ARCHITECTURAL
& ENGINEERING
SPECIFICATIONS

The loudspeaker system shall have an

operating bandwidth of 60 Hz to 18 kHz. The
nominal output level shall be 98 dB (full
range), 98 dB (bi-amp) when measured at a
distance of one meter with an input of one
watt. The nominal impedance shall be 8
ohms (full range), 8 ohms (bi-amp). The
maximum continuous power handling shall
be 150 watts (full range), 150 watts (bi-amp),
and maximum program power of 300 watts
(full range), 300 watts (bi-amp), with a
minimum amplifier headroom of 3 dB. The
nominal radiation geometry shall be 45° in
the horizontal plane and 90° in the vertical
plane. The outside dimensions shall be 23
inches wide by 16.5 inches high by 13.3
inches deep, with a rear width of 16.5
inches. The weight shall be 54 lbs. The
loudspeaker system shall be a Peavey
model Impulse™ 1282.

6.0 dB

0.0 dB

-6.0 dB

-12.0 dB

-18.0 dB

-24.0 dB

-30.0 dB

-36.0 dB

-42.0 dB

-48.0 dB

-54.0 dB
20 50 100 200 500 1K 2K 5K 10K 20K

2nd & 3rd Harm. (1/10 Power)

Fig. 5

= 2nd Harm. = 3rd Harm.

6.0 dB

6.0 dB

0.0 dB

0.0 dB

-6.0 dB

-6.0 dB

-12.0 dB

-12.0 dB

-18.0 dB

-18.0 dB

-24.0 dB

-24.0 dB

-30.0 dB

-30.0 dB

-36.0 dB

-36.0 dB

-42.0 dB

-42.0 dB

-48.0 dB

-48.0 dB

-54.0 dB

-54.0 dB
20 50 100 200 500 1K 2K 5K 10K 20K

2nd & 3rd Harm. (1/100 Power)

Fig. 6

= 2nd Harm. = 3rd Harm.

LIMITED WARRANTY

Peavey Electronics Corporation warrants to the original purchaser of this new
Architectural Acoustics product that it is free from defects in material and workmanship.
If within one (1) year from date of purchase a properly installed product proves to be
defective and Peavey is notified, Peavey will repair or replace it at no charge. (Note:
Batteries and patch cords not covered.) “Original purchaser” means the customer for
whom the product is originally installed.
Damage resulting from improper installation, interconnection of a unit or system of
another manufacturer, accident or unreasonable use, neglect or any other cause not
arising from defects in material and workmanship is not covered by this warranty. The
warranty is valid only as to products purchased and installed in the United States.
THIS LIMITED WARRANTY IS IN LIEU OF ANY AND ALL WARRANTIES, EXPRESSED
OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR USE. UNDER NO CIRCUMSTANCES WILL PEAVEY BE
LIABLE FOR ANY LOST PROFITS, LOST SAVINGS, INCIDENTAL DAMAGES OR CONSE­QUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PRODUCT,
EVEN IF PEAVEY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. THIS
LIMITED WARRANTY IS THE ONLY EXPRESSED WARRANTY ON THIS PRODUCT, AND
NO OTHER STATEMENT, REPRESENTATION, WARRANTY, OR AGREEMENT BY ANY
PERSON SHALL BE VALID OR BINDING UPON PEAVEY.
Peavey’s liability to the original purchaser for damages for any cause whatsoever and
regardless of the form of action is limited to the actual damages up to the greater of Five
Hundred Dollars ($500) or an amount equal to the purchase price of the product that
caused the damage or that is the subject of or is directly related to the cause of action. This
limitation of liability will not apply to claims for personal injury or damage to real property
or tangible personal property allegedly caused by Peavey’s negligence. For information
on service under this warranty, call a Peavey customer service representative at
[phone].

3

45.0

67.5

°

90.0

°

Enclosure

Orientation

HORIZONTAL POLAR PATTERNS

6 dB per division

0.0

°

-22.5

22.5

°

°

°

-45.0

°

-67.5

°

67.5

-90.0

90.0

°

°

45.0

°

22.5

°

0.0

°

-22.5

°

°

-45.0

°

-67.5

°

67.5

-90.0

90.0

°

22.5

45.0

°

°

°

0.0

°

-22.5

°

°

-45.0

°

-67.5

°

-90.0

°

90.0

90.0

67.5

67.5

°

°

45.0

°

45.0

°

250 Hz 315 Hz

0.0

°

-22.5

-22.5

°

-45.0

°

-67.5

°

-90.0

°

°

-45.0

°

-67.5

°

-90.0

°

90.0

90.0

67.5

67.5

45.0

°

°

45.0

°

°

22.5

°

°

500 Hz

0.0

22.5

°

°

°

400 Hz

0.0

°

-22.5

-22.5

°

-45.0

°

-67.5

°

67.5

-90.0

°

-45.0

°

-67.5

-90.0

90.0

°

°

67.5

90.0

°

22.5

45.0

°

°

°

22.5

45.0

°

°

°

22.5

°

°

630 Hz

0.0

22.5

°

°

°

°

800 Hz

°

0.0

0.0

°

-22.5

°

-45.0

°

-67.5

°

-90.0

°

°

-22.5

°

-45.0

°

-67.5

°

-90.0

°

90.0

67.5

°

45.0

°

1 kHz

0.0

°

-22.5

22.5

°

°

2 kHz

°

-45.0

°

-67.5

°

67.5

90.0

-90.0

°

°

1.25 kHz 1.6 kHz

0.0

°

-22.5

°

-45.0

°

-67.5

°

-90.0

90.0

°

45.0

°

22.5

°

°

2.5 kHz

67.5

0.0

°

-22.5

22.5

°

45.0

°

°

°

3.15 kHz

°

-45.0

°

-67.5

°

-90.0

°

4