Specifications
TOURING
• 35
T
he Macro-Tech
®
02 Series amplifiers deliver superior sonic accuracy
and enormous amounts of power from a low-profile design—perfect
for touring and fixed installations. Crown’s patented ODEP
®
(Output Device
Emulation Protection) and Grounded Bridge™ output circuitry enhance
reliability and virtually eliminate distortion. Dual, Bridge-Mono or Parallel-
Mono modes allow you to optimize power to your loads, while IOC
(Input/Output Comparator) circuitry acts as a supersensitive distortion
meter, giving proof of distortion-free performance.
`SPECIFICATIONS
Performance
Frequency Response (at 1 watt) 20 Hz to 20 kHz:
±0.1 dB.
Phase Response (at 1 watt, 10 Hz to 20 kHz):
±10 degrees.
Signal-to-Noise Ratio (below rated full bandwidth
power), A-weighted: > 105 dB.
Total Harmonic Distortion (THD) (at rated power),
20 Hz to 1 kHz: < 0.05%
At 20 kHz: < 0.1%.
Intermodulation Distortion (IMD) (60 Hz and 7
kHz at 4:1) from 163 milliwatts to full bandwidth
power: < 0.05%.
Damping Factor (8 ohm) 10 Hz to 400 Hz: >1000.
Crosstalk (below rated power), 20 Hz to 1 kHz:
> 85 dB.
Voltage Gain (at maximum level setting, ±6%)
MA-602: 35-dB gain at 0.775-volt sensitivity; 30-dB
gain at 1.4-volt sensitivity.
MA-1202: 36-dB gain at 0.775-volt sensitivity; 31-
dB gain at 1.4-volt sensitivity.
MA-2402: 38-dB gain at 0.775-volt sensitivity; 33-
dB gain at 1.4-volt sensitivity.
Controlled Slew Rate: >13 volts/microsecond.
Input Impedance: (balanced, unbalanced): 20 k
ohms, 10 k ohms.
Load Impedance: Safe with all types of loads.
Rated for 2 to 8 ohms in Stereo, 4 to 16 ohms in
Bridge-Mono, and 1 to 4 ohms in Parallel-Mono.
DC Output Offset (shorted input): < ±10 millivolts.
Required AC Mains (±10%, –15%): 50 /60Hz,
100-240VAC.
Power Draw at Idle: 100 watts or less.
Front Panel Controls
Enable: A push button used to turn the amplifier
on and off.
Level: A rotary control for each channel with
31 detents used to control the output level.
Back Panel Controls
Stereo/Mono: A three-position back panel switch
used to select Stereo, Bridge-Mono or Parallel-
Mono mode.
Reset (Macro-Tech 2402 only): A push button for
each channel, used to reset the circuit breaker that
protects each power supply.
Input Ground Lift: This switch on the PIP2-FXQ is
used to isloate input signal grounds from chassis
grond to prevent ground loops.
Other Controls
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.
Front Panel Indicators
Enable: This amber indicator shows the on/off sta-
tus of the low-voltage power supply.
Signal/IOC: Each channel has a green indicator
that flashes to show amplifier output. If a channel’s
output waveform differs from its input by 0.05% or
more, the indicator flashes brightly to show distor-
tion. This function provides proof of distortion-free
performance. In Parallel-Mono mode, the Channel
2 light stays on.
ODEP: Each channel has an amber indicator 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 conditions.
Input Connectors
Factory-installed PIP2-FXQ provides one 3-pin
female XLR connector for each channel in parallel
with one 1/4-inch phone jack connector for each
channel.
Output Connectors
Two sets of 5-way, color-coded binding posts for
banana plugs, spade lugs or bare wire (European
models do not accept banana plugs).
Protection
Macro-Tech amplifiers are protected against shorted,
open or mismatched loads; overloaded power sup-
plies; excessive temperature, chain destruction phe-
nomena, input overload damage and high-frequency
blowups. They also protect loudspeakers from
input/output DC and turn-on/turn-off transients.
Cooling
Flow-through ventilation from front to side panels.
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 and 16-
inch (40.6-cm) depth behind the mounting surface.
Weight
Net Weight,
MA-602: 39 lbs. 9 oz. (17.9 kg);
MA-1202: 44 lbs. 1 oz. (20.0 kg);
MA-2402: 51 lbs. 12 oz. (23.5 kg).
Shipping Weight,
MA-602: 44 lbs. (19.9 kg);
MA-1202: 47 lbs. (21.3 kg);
MA-2402: 65 lbs. (29.5 kg).
Accessories
Cooling fan option, level control shaft lock.
IQ Network Accessories: Accepts most
PIP modules. Can accept IQ-PIP LITE
module when paired with the IQ-PIP USP2
Adapter Kit (some functionality will be limited).
Regulatory Certifications
Other Applications
All measurements apply to units in Stereo mode with
8-ohm loads and rated input sensitivity unless other-
wise specified.