Crown International
P.O. Box 1000
Elkhart, IN 46515-1000
TEL: 574-294-8200
FAX: 574-294-8FAX
www.crownaudio.com
11/01 134167-1
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
219-294-8200.
MA-24x6
that a channel has no reserve, its indicator will
turn off and the ODEP circuitry will limit the
channel’s output drive.
Input/Output
Input Connector:
Two balanced ¼-inch
(6.35-mm) phone jacks on the back panel and
two balanced three-pin female XLR connectors
on the factory-installed PIP-FX.
Input Impedance:
Nominally 20 k ohms, bal-
anced. Nominally 10 k ohms, unbalanced.
Maximum Input Level:
13 volts peak.
Input Sensitivity (for rated power at 1 kHz):
0.775 volt, 1.4 volts, 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 milli-
volts.
Output Signal:
Unbalanced, two-channel.
Protection
Macro-Tech amplifi ers are protected against
shorted, open or mismatched loads; overloaded
power supplies; excessive temperature; chain
destruction phenomena; input overload
damage; 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. Con-
trolled slew-rate voltage amplifi ers prevent RF
burnouts, and input overload protection is pro-
vided 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 modules including IQ-PIP modules.
With the IQ-PIP-USP2 Adapter installed into the
MA-24x6, the amplifi er can accept the IQ-PIP-
USP2 module.
Construction
Steel chassis with durable black fi nish, alumi-
num front panel with Lexan overlay, and spe-
cially 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-inch
(8.9-cm) height, 16-inch (40.6-cm) depth
behind the mounting surface and 2.5-inch
(6.3-cm) protrusion in front of the mounting
surface.
Center of Gravity:
Approximately 6 inches
(15.2 cm) behind front mounting surface.
Shipping Weight:
54 lbs, 11oz (24.8 kg).
Specifi cations subject to change without prior notice. Latest infor-
mation available at www.crownaudio.com.
PIP is a trademark, and Crown, IOC, Macro-Tech and
ODEP are registered trademarks of Crown International. Other
trademarks are the property of their respective owners.
Printed in U.S.A.
© 2001 Crown Audio, Inc.
fi
INTERNATIONAL, INC.
ELECTRONIC EQUIPMENT
ELKHART, IN 46517
MADE IN U.S.A.
SERIAL NUMBER
0000
000000
UNBALANCED
INPUT WIRING
BALANCED
INPUT WIRING
REG. U.S. PAT. OFF.
3,808,545
4,330,809
4,611,180
THIS AMPLIFIER IS EQUIPPED WITH SELECTABLE INPUT SENSITIVITY. REMOVE P.I.P. MODULE TO ACCESS SENSITIVITY SWITCH.
CH-2
(600)
CH-1
(2400)
CH-2
CH-1
+
TIP
RING
SLEEVE
GND
INPUT GROUND LIFT
LIFT
+
TIP
SLEEVE
GND
(AFFECTS PHONE INPUTS ONLY.)
INPUTS
MODEL: MACRO-TECH 24x6 SERIES
AC VOLTS: 120 AMPS: 13 60 Hz
(2400)
CLASS 1
OUTPUT
WIRING
REQUIRED.
PUSH TO RESET
(600)
OUTPUTS
CAUTION:
TO PREVENT ELECTRIC SHOCK DO NOT REMOVE TOP OR
BOTTOM COVERS. NO USER SERVICEABLE PARTS INSIDE. REFER SER-
VICING TO QUALIFIED SERVICE PERSONNEL. DISCONNECT POWER CORD
BEFORE REMOVING REAR P.I.P. MODULE TO ACCESS GAIN SWITCH.
ATTENTION:
D BRANCHER AVANT D’OUVRIR.
WARNING:
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO
NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
Programmable
Input Processor (P.I.P.)
3
1
2
GND
I N P U T
I N P U T
C H - 2
C H - 1
PUSH
PUSH
FX
