Crown International, Inc.
1718 W. Mishawka Rd.
Elkhart, IN 46517-9439
TEL: 574-294-8200
FAX: 574-294-8FAX
www.crownaudio.com
5/05 136704-1B
Crown’s Three-Year, No-Fault, Fully Transferable Warranty
Crown offers a Three-Year, No-Fault, Fully Transferable Warranty for every new Crown ampli-
fi er—an unsurpassed industry standard. With this unprecedented No-Fault protection, your new
Crown amplifi er is warranted to meet or exceed original specifi cations for the fi rst three years of
ownership. During this time, if your amplifi er fails, or does not perform to original specifi cations,
it will be repaired or replaced at our expense. About the only things not covered by this warranty
are those losses normally covered by insurance and those caused by intentional abuse. And the
coverage is transferable, should you sell your amplifi er.
See your authorized Crown dealer for full warranty disclosure and details. For customers outside
of the USA, please contact your authorized Crown distributor for warranty information or call
574-294-8200.
Controls
Enable:
A front-panel push button used to turn
the amplifi er on and off.
Level:
A front-panel 31-detent rotary control
for each channel used to control the output
level.
Stereo/Mono:
A three-position back-panel
switch used to select Stereo, Bridge-Mono or
Parallel-Mono mode.
Sensitivity:
A three-position switch inside the
PIP™ compartment used to select the input
sensitivity for both channels: 0.775 volts or
1.4 volts for standard 1 kHz power, or a 26 dB
voltage gain.
Reset (MA-2402 only):
A back-panel push
button for each channel used to reset the circuit
breaker that protects each power supply.
Indicators
Enable:
An amber front-panel indicator that
shows the on/off status of the low-voltage
power supply.
Signal/IOC:
A green front-panel indicator for
each channel that fl ashes to show amplifi er
output. If a channel’s output waveform differs
from its input by 0.05% or more, the indicator
fl ashes brightly to show distortion. This func-
tion provides proof of distortion-free perfor-
mance. In Parallel-Mono mode, the Channel 2
light stays on.
ODEP:
An amber front-panel indicator for each
channel that shows thermal-dynamic energy
reserve. Normally, each ODEP indicator is lit to
show available reserve energy. In the rare event
that a channel has no reserve, its indicator will
dim in proportion to ODEP limiting. An ODEP
indicator may also turn off under other condi-
tions.
Input/Output
Input Connector:
Two balanced 1/4-inch (6.35-
mm) phone jacks on the back panel and two
balanced three-pin female XLR connectors on
the factory-installed PIP2-FXQ.
Input Impedance (Nominal):
20 k ohms, bal-
anced; 10 k ohms, unbalanced.
Maximum Input Level:
9 Vrms.
Input Sensitivity:
0.775 volts for standard 1
kHz power, 1.4 volts for standard 1 kHz power,
or a 26 dB voltage gain.
Output Connectors:
Two sets of color-coded
5-way binding posts (for banana plugs, spade
lugs or bare wire).
Output Impedance:
Less than 10 milliohms in
series with less than 2 microhenries.
DC Output Offset:
(Shorted input)
< ±10 millivolts.
Output Signal
Stereo:
Unbalanced, two-channel.
Bridge-Mono:
Balanced, single-channel. Chan-
nel 1 controls are active; Channel 2 should not
be used.
Parallel-Mono:
Unbalanced, single-chan-
nel. Channel 1 controls are active; Channel 2
controls are bypassed.
Protection
Macro-Tech amplifi ers are protected against
shorted, open or mismatched loads; overloaded
power supplies; excessive temperature; chain
destruction phenomena; input overload dam-
age; and high-frequency blowups. They also
protect loudspeakers from input/output DC and
turn-on/turn-off transients.
If unreasonable operating conditions occur, the
patented ODEP circuitry will proportionally limit
the drive level to protect the output transistor
stages, particularly in the case of elevated tem-
perature. Transformer overheating will result in
a temporary shutdown of the affected channel;
when it has cooled to a safe temperature, the
transformer will automatically reset itself.
Controlled slew-rate voltage amplifi ers prevent
RF burnouts. And input overload protection is
provided by current-limiting resistance at the
input.
Turn On:
Four-second delay with no dangerous
transients. Delay time can be changed (contact
Crown’s Technical Support Group).
Accessories
Crown PIP and PIP2 modules including IQ-PIP
modules, which allow networking via HiQnet or
TCP/IQ.
Construction
Steel chassis with durable black power-coat fi n-
ish, aluminum front panel with Lexan overlay,
and specially designed fl ow-through ventilation
from front to side panels.
Cooling:
Internal heat sinks with forced-air
cooling for rapid, uniform heat dissipation.
Dimensions:
EIA Standard 19-inch (48.3-cm)
rack mount width (EIA RS-310-B), 3.5 inches
(8.9 cm) high, 16 inches (40.6 cm) deep behind
the mounting surface and 2.5-inch (6.3-cm)
protrusion in front of the mounting surface.
Weight:
MA-602: 39 lb, 9 oz (17.9 kg) net.
44 lb (19.9 kg) shipping weight.
MA-1202: 44 lb, 1 oz (20.0 kg) net.
47 lb (21.3 kg) shipping weight.
MA-2402: 51 lb, 12 oz (23.5 kg) net.
65 lb (29.5 kg) shipping weight.
Center of gravity is 6 inches (15.2 cm) behind
front mounting surface.
©2005 Crown Audio
®
Inc. Specifi cations subject to change
without prior notice. Latest information available at www.
crownaudio.com.
Crown, Crown Audio, Macro-Tech, IOC and ODEP are reg-
istered trademarks, and Grounded Bridge, PIP and PIP2 are
trademarks of Crown International. HiQnet is a trademark of
Harman International Industries, Inc. Printed in U.S.A.
MA-2402
MA-1202
MA-602
MA-2402 is shown below. MA-602 and MA-1202 omit the reset buttons.
