Crown International, Inc.
1718 W. Mishawaka Rd.
Elkhart, IN 46515-9439
TEL: 574-294-8200
FAX: 574-294-8FAX
www.crownaudio.com
MA-5002VZ
MACRO-TECH SERIES
6/06 128360-2C
Specifications subject to change without prior notice.
Crown, IOC, IQ System, Macro-Tech, Multi-Mode, ODEP and
VZ are registered trademarks and Grounded Bridge, PIP and
PIP2 are trademarks of Crown International, Inc. HiQnet is
a trademark of Harman International Industries, Inc. ©2006
Crown International. Printed in U.S.A.
Macro-Tech 5002VZ (120 V, 60 Hz models)
The power amplifier shall be a solid-state two-
channel model employing multi-mode®(AB+B)
grounded bridgeTM output circuitry with a VZ®
(Variable Impedance) power supply for each
channel.
The outputs shall be switchable as stereo,
bridged-mono or parallel-mono modes of
operation. The bridged-mono mode shall bridge
the outputs to provide increased output volt-
age. The parallel-mono mode shall parallel the
outputs to provide increased output current.
The output impedance of each channel shall be
less than 10 milliohms in series with less than
2 microhenries in stereo mode.
When configured to do so, the variable imped-
ance power supplies shall reduce unnecessary
voltage across the output devices by automati-
cally switching to a parallel mode when less
voltage is required by the output circuitry
and to a series mode when more voltage is
required.
The amplifier shall contain protection circuitry
which limits the drive level placed on the output
devices before their SOA (Safe Operating Area)
is exceeded. This protection circuitry shall
calculate the instantaneous voltage across and
current through the output devices while factor-
ing in their simulated junction temperatures to
predict how close they are to their operating
limits. This protection will be called “ODEP.”
The amplifier shall contain controlled slew-
rate voltage circuitry to protect it against radio
frequency interference burnouts. It shall also
be protected from current overload at its output
stage. The slew rate of the amplifier shall be
greater than 30 volts per microsecond in stereo
mode.
The amplifier shall temporarily go into a stand-
by mode if its power transformer becomes
excessively hot and shall automatically resume
normal operation once it has cooled to a safe
operating temperature.
The amplifier shall contain loudspeaker protec-
tion circuitry which protects against DC, off-
center woofer cone movement and unwanted
subsonic and ultrasonic frequencies.
Front-panel controls shall include an enable
on/off switch and a detented input level control
for each channel.
Rear-mounted controls shall include a switch
which selects between stereo, bridged-mono
and parallel-mono modes of operation, a com-
pressor switch for each channel which selects
between off, fast or slow compressor speeds, a
loudspeaker offset integration switch for each
channel to turn the loudspeaker protection
circuitry on or off, a sensitivity switch for each
channel to select between 0.775 V, 1.4 V or a
fixed voltage gain of 26 dB for full rated output
and a ground lift switch to isolate the signal
ground from the chassis ground.
Internal controls shall include a VZ mode
switch for each channel to control the operation
of the variable impedance power supplies. The
VZ mode switches shall determine whether the
variable impedance power supplies are locked
into the parallel mode, whether they are al-
lowed to automatically switch between parallel
and series modes or whether the output device
protection circuitry can automatically override
automatic operation and force the use of the
parallel mode.
The amplifier shall be fully compatible with
and shall provide appropriate input cables and
connectors for Crown®PIP2™ input modules.
The amplifier shall be fully compatible with
the Harman Pro HiQnet™ System or Crown IQ
System®.
A defeatable compressor shall be provided for
each input. Each compressor shall provide a
fast mode with an attack time of 4 milliseconds
and release time of 300 milliseconds and a
slow mode with an attack time of 12 millisec-
onds and release time of 600 milliseconds.
Front panel indicators shall include an amber
power enable indicator, an amber protection
system indicator for each channel which shall
normally be illuminated to confirm the avail-
ability of reserve thermodynamic energy and
which shall dim in proportion to limiting when
the power demands of the output stages have
been exceeded, a green dual-function signal
presence/input-output comparator indicator
for each channel which shall normally flash at
moderate intensity to show the presence of an
audio signal and which shall flash brightly if
distortion of any kind equals or exceeds 0.05%,
and a two color current load/current limit indi-
cator for each channel which shall glow green
when load current is flowing out of the ampli-
fier and turn red when the maximum current is
being delivered to the load.
The power amplifier shall meet or exceed the
following performance criteria. Input sensitivity
for rated output: 26 dB voltage gain (unbal-
anced). Rated FTC output in stereo mode with
less than 0.1% THD: 1030 watts per channel
(20 Hz to 20 kHz) into 8 ohms. Rated FTC
output in bridged-mono mode with less than
0.1% THD: 2035 watts (20 Hz to 20 kHz) into
16 ohms. Hum and noise: at least 105 dB (A
weighted) below full rated output power. Phase
response: ±20 degrees from 10 Hz to 20 kHz
at 1 watt. Frequency response: 20 Hz to 20
kHz, ±0.1 dB at 1 watt into 8 ohms per chan-
nel in stereo mode. Damping factor: greater
than 1000 from 10 to 400 Hz into 8 ohms.
Intermodulation distortion (SMPTE): less than
0.05% from 411 milliwatts to rated power into
8 ohms in stereo mode. Harmonic distortion at
rated power into 8 ohms per channel (stereo
mode): less than 0.05% from 20 Hz to 1 kHz
and increasing linearly to less than 0.1% at 20
kHz.
The amplifier shall be safe when driving any
kind of load including highly reactive ones.
The power requirements shall be 120 VAC at
60 Hz. At idle, the amplifier shall draw 90 watts
or less.
The amplifier chassis shall be constructed of
steel with a durable black finish and shall be
designed for flow-through fan-assisted ven-
tilation from the front to the rear panels. The
amplifier shall have an aluminum front panel
with Lexan overlay and air filter media.
The dimensions of the amplifier shall allow for
19 inch (48.3 cm) EIA standard (RS-310-B)
rack mounting. The amplifier shall be 5.25
inches (13.3 cm) tall, 15.875 inches (40.3 cm)
deep behind the rack-mounting surface, and
2.875 inches (7.3 cm) in front of the rack-
mounting surface.
The amplifier shall weigh 77 pounds, 9 ounces
(35.2 kg).
The amplifier shall be designated the Crown
Macro-Tech 5002VZ.
Architectural and Engineering Specifications
