MA-24x6
M A C R O - T E C H S E R I E S
T
he Crown Macro-Tech Series is the defi n-
ing standard for amplifi er design today.
No compromises, no gimmicks. Just bril-
liant engineering backed by superior manufac-
turing, support and an unsurpassed commit-
ment to quality. Like all Crown amps, the defi n-
ing characteristic of the Macro-Tech Series is
sonic accuracy. A tight, rock-solid low end,
with smooth, detailed highs and a well-defi ned
midrange. In short, the most accurate repro-
duction of an audio signal you’ve ever heard.
And because we put the quality of sound above
all else, a Crown is the most coveted amplifi er
in the business.
When it comes to manufacturing amps, our
work is based on one simple fact: there are no
shortcuts to quality. And our Macro-Techs have
proven it time and time again in some of the
most demanding applications in the world.
Developing innovative products that meet your
specifi c needs is what we’re about. Our Macro-
Tech 24x6 and 36x12 provide a practical solu-
tion to biamplifi ed system applications such as
stage moniors. Each amp combines a high-
and medium-power module in a single, low-
profi le unit.
For more details about the Crown Macro-Tech
Series, contact the Crown Technical Support
Group at 800-342-6939 or 219-294-8200.
Also, visit the Crown Audio website at
www.crownaudio.com.
Specifi cations
Note: Specifi cations relate to 120-volt, 60-Hz units in Stereo
mode with 8-ohm loads and an input sensitivity of 26-dB gain
at 1 kHz rated power unless otherwise specifi ed. Specifi ca-
tions for units supplied outside the U.S.A. may vary slightly at
different AC voltages and frequencies.
Power
Output Power:
Load Impedance:
Safe with all types of loads,
even reactive ones. Rated for 2 to 16 ohms.
Voltage Gain to 8-ohm load at rated output at
1 kHz, maximum level setting:
Channel 1 (2400):
83:1 ±6% or 38 dB ±0.5
dB at 0.775-volt sensitivity; 46:1 ±6% or 33 dB
±0.5 dB at 1.4-volt sensitivity.
Channel 2 (600):
54:1 ±6% or 35 dB ±0.5 dB
at 0.775-volt sensitivity; 30:1 ±6% or 30 dB
±0.5 dB at 1.4-volt sensitivity.
20:1 ±6% or 26 dB ±0.5 dB at +26 dB sensitiv-
ity.
Required AC Mains:
All units require 90 watts
or less at idle. Current, voltage and frequency
requirements are provided on the unit’s back
panel.
AC Line Connector:
NEMA 5-15P.
Performance
Frequency Response:
±0.1 dB from 20 Hz to
20 kHz at 1 watt.
Phase Response:
±10 degrees from 10 Hz to
20 kHz at 1 watt.
Signal-to-Noise Ratio, 20 Hz to 20 kHz:
Better than 105 dB A-weighted or 100 dB
unweighted below rated full bandwidth power.
Total Harmonic Distortion (THD):
At full band-
width power, less than 0.05% from 20 Hz to
1 kHz increasing linearly to less than 0.1% at
20 kHz.
Intermodulation Distortion (IMD):
(60 Hz and
7 kHz at 4:1) Less than 0.05% from 10 mil-
liwatts to full bandwidth power.
Damping Factor:
Greater than 1,000 from 10
Hz to 400 Hz.
Slew Rate:
(Slew rates are limited to useful
levels for ultrasonic/RF protection.) Channel 1,
greater than 30 volts per microsecond; Channel
2, greater than 13 volts per microsecond.
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.
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:
A back-panel push button for each chan-
nel used to reset the circuit breaker that pro-
tects 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.
ODEP:
Each channel has an amber front panel
indicator that shows thermal-dynamic energy
reserve. Normally, each ODEP indicator is lit
to show available reserve energy. The indicator
will dim proportionally as the energy reserve
for its channel descreases. In the rare event
Features
• Crown’s Grounded Bridge™ design delivers
large voltage swings without using easily
stressed output-transistor configurations
like conventional amplifi ers. The results are
lower distortion and superior reliability.
• Patented ODEP
®
(Output Device Emulation
Protection) circuitry compensates for over-
heating and overload to keep the amplifi er
working when others would fail.
• IOC
®
(Input/Output Comparator) circuitry
immediately alerts of any distortion exceed-
ing 0.05%, providing dynamic proof of
distortion-free performance.
• PIP™ (Programmable Input Processor) con-
nector accepts accessory modules that tailor
the amplifi er to suit specifi c applications.
• Convenient high- and medium-power channel
design for biamplifi ed systems such as stage
monitors.
• Very low harmonic and intermodulation
distortion results in the best dynamic transfer
function in the industry.
• Balanced 1/4-inch(6.35-mm) phone jack
inputs for each channel, with balanced XLR
connectors on the standard PIP-FX module.
• Full protection from shorted, open and mis-
matched loads; general overheating; DC;
high-frequency overloads; and internal fault
conditions.
• Three Year, No-Fault, Fully-Transferable
Warranty completely protects your investment
and guarantees its specifi cations.
LEVEL
LEVEL
ON
OFF
30
27
24
21
18
15
12
9
6
3
0
ENABLE
ODEP
30
27
24
21
9
6
3
0
SIGNAL / IOC
18
15
12
CH1
CH2
(2400)
(600)
