Electro voice 1 5 kw brochure

Page 1

ElectroVoice° -

1.5kW

Lightweight Power

Amplifier

- 450 watts per channel at 8 ohms.
750 watts per channel at 4 ohms,
1.550 watts per channel at 8 ohms
in bridge mode

0 Dynamic Signal Processing
provides excellent low-lrequancy
pertormance

t Ultralightwelght-only 24 pounds

0 Conservative thermal design
ensures low-operating temperature

0 Class H circuitry
- Dual-Mono Construction

- Separate switch-mode power
supply for each channel

- Three-year parts-and-Iabor warranty

Description

The Electro-Voice l.5kW is a very high-
quality amplifier designed to provide maxi-
mum sonic quality with minimum weight.
Its built-in Dynamic Signal ProcessingTM
extracts maximum performance from any
full-range speaker system.

Each channel of the 1.5kW can deliver more
than 750 watts into a 4-ohm load. or450 watts
into an 8-ohm load at less than 1% THD at l
kHz. In bridge mode. the amplifier deliv-
ers more than 1.550 watts into an 8~ohm
load.

The l.5kW design features an innovative
Class H operation. Class H operation allows
a primary compliment of output devices to
operate in lowpower situations. as larger
power requirements are made of the ampli-
fier. a secondary group of output devices are
pressed into operation. Class H operation
offers the ability to supply large amounts of
power with excellent efficiency and reduces
the potential for heat buildup inside the am.
plifier chassis.

The high-speed switch-mode power supplies
in the 1.5kW hold the secret to the light
weight ofthe amplifier. Each channel of the

amplifier has a separate power supply that
switches at a rate of 84,000 times per sec-
ond. which allows the toroidal u'anst'ormers
to be significantly downsized. The smaller
transformers substantially decrease the
weight of the amplifier and also lower the
amount of heat created inside the amplifier.
Heat is a major contributor to the failure of
electronic equipment and the 1.5kW utilizes
a thermal system that effectively removes
heat from the amplifier. Each channel of the
1.5kW has a totally separate heat sink more
than l8 inches in length that runsdown each
side of the amplifier. Placing the heat sinks
on opposite sides of the amplifier chassis
avoids creating an area of concentrated heat.
and makes removal of heat a much easier
job. Each channel is also equipped with a
continuously variable speed fan to remove
the heat and the fans are quiet enough to be
used in noisesensitive situations.

The 1.5kW employs extensive protection
circuitry that guards the amplifier and its load
from problems. Protection circuits guard
against over-temperature, turn on/off tran-
sients. shorted outputs. radio-frequency inter-
ference and dc faults.

The operating status of the amplifier is in-

dicated by LEDs mounted on the front
panel. Each channel has an independent peak
indicator. Power on. bridge mode. protection
active and excessive heat situations are also
individually indicated via an LED on the
front panel of the amplifier.

The 1.5kW has electronically balanced
combo type input connectors that accept an
IEC 268 standard XLR-type connector. or a
l/4-inch phone plug. A parallel connection
for routing signal to additional amplifiers is
provided by a male XLR-type connector on
each channel.

An input routing switch that allows selec-
tion of either dual-channel operation or
bridge-mode operation of the amplifier is lo-
cated at the bottom of the rear panel. and
when engaged is flush with the panel to
prevent accidental bumping of the switch.
Output connectors are heavy-duty binding
posts that provide a secure connection via
banana plugs. or will accept wire up to
7AWG in size.

Detented potentiometers on the front panel of
the l.5kW regulate the gain of the amplifier.
The different levels of attenuation are
indicated for each channel.

The Dynamic Signal Processing circuitry in

Page 2

1.5kW Lightweight Power Amplifier

1 .5kW Lightweight Power Amplifier

all kW Series amplifiers sets their performance
apart from other lightweight amplifiers. Two
switches on the rear of the amplifier select
the mode of operation of the processor and
a pole frequency that should be matched to
the tuning of a speaker system This innova-
tive circuitry ensures that the transient re-
sponse of a speaker systems low-frequency
driver is accurately controlled and any phase
distortion is minimized. The three settings
available are LPN. B6 and Off. The LPN
setting is used for compact, vented speaker
systems other than those manufactured by
Electro-Voice. It is a second-order shelving
equalizer with a pole frequency of 50 Hz.
The Bo setting is specifically for Electro-
Voice speaker systems and supplies a 6 dB
boost at the selected pole frequency that is
flawlessly combined with an undamped
second-order high»pass filter to provide
maximum low-frequency impact and infra~
sonic protection. The B6 setting offers three
different peak-boost frequencies: 26 Hz. 43 Hz
and 60 Hz. The box tuning frequency of a
speaker system determines which pole fre-
quency is appropriate.

The 1.5kW has been evaluated and tested to
applicable ANSI/UL and CSA standards for
use in the US. and Canada. The NRTL/C
mark adjacent to the CSA mark signifies the
product meets applicable standards in the
U.S. and Canada.

The 24-pound ElectroVoice 1.5kW deliv-
ers professional-quality amplification. Long-
tenn reliability and maximum portability
make this amplifier the foremost choice

among mobile sound professionals.
M

Architects and Engineers
Specifications

The power amplifier shall be a dual-channel
model of solid-state design employing high-
power output devices in a true-complimentary-
symmerry output circuit. It shall be capable of
operating from a 120 V. 60 Hz or 220/240 V.
50 Hz ac line.

The amplifier shall contain sensing circuitry
to provide protection for the output transis-
tors against overtemperature. excessive out-
put voltage. radio-frequency interference,
shorted loads and excessive phase shift. The

load shall be similarly protected against start
up/shutdown transients. low ac line voltage.
and dc.

The power amplifier shall contain processing
circuitry that will ameliorate the phase and
transient response problems of the loud-
speaker. The built-in processor shall be ca~
pable of being adjusted for the enclosure type
and low-frequency characteristics of the
connected speaker.

Rear-mounted'panel controls shall include
an input routing switch for selecting dual/
stereo or parallel mono operation and two
switches for control of the processor. The
processor controls shall include a switch for
turning the processor off and selecting the
enclosure type and three selectable frequen-
cies for B6 alignment of 60 Hz. 43 Hz and
26 Hz.

Front-panel indicators shall include power
on. peak. overtemperature, protect active.
and bridge~mode. Front-panel controls shall
include a power switch and level controls
that shall be detented potentiometers with
accurate markings.

The power amplifier shall meet the follow-
ing performance specifications: maximum
input voltage, 7.75 V nits; input voltage for
rated output power into 4 ohms, shall be
.74 V rms; rated output power per channel,
greater than 600 watts into 4 ohms from
20 Hz to 20 kHz at less than 0.10 Tl-ID,
greater than 350 watts into 8 ohms from
20 Hz to 20 kHz at less than 0.10 THD.
greater than 1.200 watts into an 8 ohm
bn'dged load from 20 Hz to 20 kHz at less
than 0.10% THD; hum and noise shall be
greater than 100 dB (A weighted) below
rated output power: frequency response
shall be 12 to 60 kHz. +0/-3 dBr. any mode.
at any output power up to rated output power:
damping factor shall be greater than 200 at
any frequency up to 1 kHz in dual mode with
an 8 ohm load: intermodulation distortion
(SMPTE) shall be less than 0.05% at rated
power in any mode into 8 ohms; operating
temperature shall be up to 50 C ambient;
channel separation shall be greater than 50 dB.

Dimensions shall be (H x W x D): 88.9 mm
(3.5 in.) x 482.6 mm (19 in.) x 469.9 mm

(18.5 in.). Net weight shall be 10.88 kg
(24 lb). Color: dark gray with white nomen-
clature.

The 1.5kW has been evaluated and tested to
applicable ANSI/UL and CSA standards for
use in the US. and Canada. The NRTIJC
mark adjacent to the CSA mark signifies the
product meets applicable standards in the
US. and Canada.

The power amplifier shall be the
Electro-Voice LSKW.

Uniform Limited Warranty Statement

ElectroAVoice products are guaranteed
against malfunction due to defects in mate-
rials or workmanship for a specified period.
as noted in the individual product~line
statement(s) below. or in the individual prod-
uct data sheet or owners 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 returned to the customer prepaid.
Exclusions and Limitations: The Limited
Warranty does not apply to: (a) exterior fin-
ish or appearance; (b) certain specific items
described in the individual product-line
statement(s) below, orin the individual prod-
uct data sheet or owners manual; (c) mal-
function resulting from use or operation of
the product other than as specified in the
product data sheet or owners 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 EV] Au~
dio Service or any of its authorized service
representatives. Obtaining Warranty Ser-
vice: To obtain warranty service. a customer
must deliver the product. prepaid, to EVI
Audio Service or any of its authorized ser~
vice representatives together with proof of
purchase of the product in the form of a bill
of sale or receipted invoice. A list of autho-
rized service representatives is available from
EV] Audio Service at 600 Cecil Street.
Buchanan. M149107(800/234-6831 or FAX
616/695-4743). Incidental and Conse-
quential Damages Excluded: Product re»
pair or replacement and return to the cus-
tomer are the only remedies provided to the