MA-5002VZ Service Manual
2-2 Specifications
130446-1 Rev. A
©2000 Crown International, Inc.
Figure 2.1 Dimensions
DC Output Offset: ±10 millivolts.
Output Signal
Stereo: Unbalanced, two-channel.
Bridge-Mono: Balanced, single-channel. Channel 1 controls are
active; Channel 2 controls are removed from operation.
Parallel-Mono: Unbalanced, single-channel. Channel 1 controls are
active; Channel 2 controls are by passed.
Protection
Macro-Tech amplifiers 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 loud-
speakers 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
temperature. 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 amplifiers protect against RF burnouts.
Figure 2.2 Typical Phase Response
And input overload protection is provided by the input compres-
sors and current-limiting resistance at the input.
Turn On: The four second turn-on delay prevents dangerous turn-
on transients. It also has “soft start” to avoid tripping the AC circuit
breaker by gradually bringing the supplies up to full voltage.
Accessories: Crown PIP and PIP2 modules including IQ-PIP
modules.
Construction
Steel chassis with durable black finish, aluminum front panel with
Lexan overlay, and specially designed flow-through ventilation from
front to back panels.
Cooling: Internal heat sinks with on-demand, proportional forced-
air cooling controlled by ODEP. Includes custom heat diffusers and
patented circuitry to promote uniform dissipation.
Dimensions: 19-inch (48.3-cm) standard rack mount width (EIA
RS-310-B), 5.2-inch (13.3-cm) height, 15.875-inch (40.3-cm)
depth behind mounting surface, and 2.875 inches (7.3 cm) in front
of mounting surface (see Figure 2.1). Allow 3 inches (7.6 cm)
behind the back panel for adequate air flow.
Approximate Weight: 77 pounds, 9 ounces (35.2 kg) net; 88
pounds, 10 ounces (40.2 kg) shipping weight.
TEF
®
+45˚
0˚
–45˚
100 1 K 10 K 20 K
FREQUENCY (Hz)
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