ELECTRO-VOICE
a
MARK IV
company
600 Cecil Street, Buchanan, Michigan 49107
MANUFACTURING PLANTS AT BUCHANAN, MI NEWPORT, TN SEVIERVILLE, TN OKLAHOMA CITY, OK GANANOQUE, ONT.
© Electro-Voice, Inc. 1995 Litho in U.S.A.
Part Number 532701 — 9528
1,200-Hz crossover frequency is recommended.
Optimum performance and reliability are pro-
vided by 24-dB-per-octave slopes. 12-dB-per-
octave slopes are the minimum recommended.
The low-frequency section should have sub-
passband protection using a high-pass filter set
at about 30 Hz. No signal delay or further EQ is
mandatory but their use can smooth response
and directivity, particularly in the region of cross-
over. The high-frequency section requires the
appropriate constant-directivity-horn high-
frequency boost EQ for flat response.
The Dx34 digital speaker system processor
can be set to provide subpassband protection,
crossover, EQ and signal delay for optimum
performance of the PIM-122. Contact Electro-
Voice for the specific parameter settings. Alter-
natively, the XEQ-2 or XEQ-3 analog cross-
over/equalizer/delay networks can be used.
High-frequency horn EQ is provided by plug-in
modules, the specific model of which is deter-
mined by the horn model. The XEQ engineering
data sheets provide this specific information.
LOW-FREQUENCY ENHANCEMENT
If it is desirable to enhance low-frequency per-
formance, Electro-Voice recommends, depend-
ing on installation requirements, the PIM-151 or
PIM-251 PI Matrix Series
TM
systems as well as
any of the TL series or MTL series of Manifold
Technology
®
systems. Contact Electro-Voice
for information on these systems.
FREQUENCY RESPONSE
PIM-122 axial frequency responses were mea-
sured in Electro-Voice’s large anechoic cham-
ber at a distance of 3.0 meters (10 feet) with
swept sine-wave input. Figure 2 shows the
typical overall system response with presets of
the Dx34 digital speaker system processor.
Speaker drive voltage is 4 volts at 1 kHz. Figure
3 shows the responses of the individual low-
and high-frequency sections with a 4-volt drive,
normalized for a 1-watt input and a 1-meter
distance.
DIRECTIVITY
The directional characteristics of the PIM-122
were measured in Electro-Voice’s large
anechoic chamber, with a test signal of one-
third-octave filtered pink noise at the frequen-
cies indicated. A full spherical measurement
system, which is fully compatible with Mark IV
Audio’s AcoustaCADD™ computer aided de-
sign program, was used. All directional infor-
mation was measured at 6.1 meters (20 feet).
Figure 8 illustrates the nominal horizontal and
vertical polar responses, with the long system
axis vertical. If the high-frequency horn is ro-
tated, then the horizontal and vertical polars
should be interchanged.
Figure 4 illustrates the horizontal and vertical
beamwidths. Beamwidth is the angle at which
the horizontal and vertical polar responses
have decreased in level by 6-dB when com-
pared to the on-axis frequency response.
Figure 5 represents the total directivity of the
PIM-122. The directivity factor R
θ
(Q) is the
relative value, at a point, when compared to an
ideal spherical response. The directivity index
(D
i
) is calculated by D
i
= 10log
10
R.
SERVICE
In the unlikely event the PIM-122 requires ser-
vice, each driver can be replaced or serviced
from the front. A service data sheet is available
from Electro-Voice.
POWER-HANDLING TEST
Electro-Voice components and systems are
manufactured to exacting standards, ensuring
they will hold up, not only through the most
rigorous of power tests, but also through contin-
ued use in arduous, real-life conditions. Two
main test specifications are used: the AES
Recommended Practice for Specification of
Loudspeaker Components Used in Professional
Audio and Sound Reinforcement (AES2-1984 /
ANSI S4.26-1984) and the EIA Loudspeaker
Power Rating Full Range (ANSI / EIA RS426-A
1980). Both of these specifications use ran-
dom-noise spectrum which mimic typical music
and test the thermal and mechanical capabili-
ties of the components. Electro-Voice will sup-
port relevant additional standards as and when
they become available. Extreme, in-house
power tests, which push the performance bound-
aries of the components, are also performed
and passed to ensure years of trouble free
service.
Specifically, the PIM-122 high-frequency sec-
tion passes AES2-1984/ANSI S4.26-1984 with
the following values:
Z
min
= 5.6 ohms at 7,000 Hz
P
E(max)
= 60 watts
Test voltage = 18.3 volts rms
36.7 volts peak (+6 dB)
Selected decade = 1,500-15,000 Hz
The PIM-122 low-frequency passes ANSI/EIA
RS-426-A 1980 with the following values:
R
SR
= 6.9 ohms (1.15 x R
E
)
P
E(max)
= 300 Watts
Test voltage = 45.5 volts rms
91.0 volts peak (+6 dB)
ARCHITECTS’ AND ENGINEERS’
SPECIFICATIONS
The loudspeaker shall be a two-way system for
biamplification. Low frequencies shall be repro-
duced by an 8-ohm 305-mm (12-in.) woofer
with an edge-wound flat-wire 63.5-mm (2.5-in.)
voice coil capable of handling 300 watts long
term per ANSI/EIA RS-426-A and with a sensi-
tivity of 95 dB 1 watt/1 meter. High frequencies
shall be reproduced by an 8-ohm compression
driver with a 76.2-mm (3-in.) diaphragm and a
51-mm (2-in.) exit, capable of handling 60 watts
long term per AES2-1984/ANSI S4.26-1984,
coupled to a constant-directivity horn with a 90°
x 40° coverage pattern and with a sensitivity of
112 dB. The high-frequency horn shall be rotat-
able 90° about its axis within the enclosure. The
system shall reproduce frequencies from 50 to
18,000 Hz and have a nominal coverage pat-
tern of 90° x 40°, with directivity control main-
tained down to 1,500 Hz. The recommended
crossover frequency shall be 1,200 Hz. Maxi-
mum average sound pressure levels at 1 meter
shall be 120 dB (low-frequency section) and
129 dB (high-frequency section), with short-
term peaks 6 dB higher.
The enclosure shall be constructed of 7-ply
void-free birch and finished in black textured
paint. The enclosure shall have a trapezoidal
footprint. Dimensions shall be 759 mm (29.9
in.) high, 485 mm (19.1 in.) wide at the front, 267
mm (10.5 in.) wide at the rear and 438 mm (17.3
in.) deep. Enclosure sides shall have a 15° draft
angle. The enclosure shall have a suspension
system approved by an independent structural
engineer and consisting of three independent
suspension points on the top and three on the
bottom, all of which shall mate with Ancra
42546-10 fittings. Net weight shall be 35.4 kg
(78 lb).
The loudspeaker system shall be the Electro-
Voice PIM-122.
Note: the PIM-122 described above is the
standard configuration. Acoustic and me-
chanical details will vary when different op-
tions are supplied.
UNIFORM LIMITED WARRANTY
Electro-Voice products are guaranteed against
malfunction due to defects in materials or work-
manship for a specified period, as noted in the
individual product-line statement(s) below, or in
the individual product data sheet or owner’s manual,
beginning with the date of original purchase. If
such malfunction occurs during the specified pe-
riod, the product will be repaired or replaced (at our
option) without charge. The product will be re-
turned to the customer prepaid. Exclusions and
Limitations: The Limited Warranty does not apply
to: (a) exterior finish or appearance; (b) certain
specific items described in the individual product-
line statement(s) below, or in the individual prod-
uct data sheet or owner’s manual; (c) malfunction
resulting from use or operation of the product other
than as specified in the product data sheet or
owner’s manual; (d) malfunction resulting from
misuse or abuse of the product; or (e) malfunction
occurring at any time after repairs have been made
to the product by anyone other than Electro-Voice
or any of its authorized service representatives.
Obtaining Warranty Service: To obtain warranty
service, a customer must deliver the product,
prepaid, to Electro-Voice or any of its authorized
service representatives together with proof of pur-
chase of the product in the form of a bill of sale or
receipted invoice. A list of authorized service rep-
resentatives is available from Electro-Voice at 600
Cecil Street, Buchanan, MI 49107 (616/695-6831
or 800/234-6831). Incidental and Consequen-
tial Damages Excluded: Product repair or re-
placement and return to the customer are the only
remedies provided to the customer. Electro-Voice
shall not be liable for any incidental or consequen-
tial damages including, without limitation, injury to
persons or property or loss of use. Some states do
not allow the exclusion or limitation of incidental or
consequential damages so the above limitation or
exclusion may not apply to you. Other Rights:
This warranty gives you specific legal rights, and
you may also have other rights which vary from
state to state.
Electro-Voice Speakers and Speaker Systems
are guaranteed against malfunction due to defects
in materials or workmanship for a period of five (5)
years from the date of original purchase. The
Limited Warranty does not apply to burned voice
coils or malfunctions such as cone and/or coil
damage resulting from improperly designed en-
closures. Electro-Voice active electronics associ-
ated with the speaker systems are guaranteed for
three (3) years from the date of original purchase.
Additional details are included in the Uniform
Limited Warranty statement.
Electro-Voice Flying Hardware (including enclo-
sure-mounted hardware and rigging accessories)
is guaranteed against malfunction due to defects
in materials or workmanship for a period of one (1)
year from the date of original purchase. Additional
details are included in the Uniform Limited War-
ranty statement.
Electro-Voice Accessories are guaranteed
against malfunction due to defects in materials or
workmanship for a period of one (1) year from the
date of original purchase. Additional details are
included in the Uniform Limited Warranty state-
ment.
Service and repair address for this product: Electro-
Voice, Inc., 600 Cecil Street, Buchanan, Michigan
49107 (616/695-6831 or 800/234-6831).
Specifications subject to change without notice.
