Page 34
Macro-Tech 5002VZ Power Amplifier
Reference Manual
Signal/IOC: Each channel has a green front panel
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
distortion.
ODEP: Each channel has an amber front panel indica-
tor that shows thermal-dynamic energy reserve. Nor-
mally, each ODEP indicator is lit to show available
reserve energy. The indicator will dim proportionally as
the energy reserve for its channel decreases. In the rare
event that a channel has no reserve, its indicator will
turn off and the ODEP circuitry will limit the channel’s
output drive (see Section 4.2).
Load/ILimit: Each channel has a two-color (green/
red) indicator that shows load current and limit cur-
rent. They glow green to indicate load current flowing
out the amplifier, and they turn red when maximum
current is being delivered to the load.
Input/Output
Input Connectors: Balanced three-pin XLR connec-
tors and balanced phone jacks are provided on the
factory-installed PIP2-FXQ . (see Section 8.1 for op-
tional
PIP
modules).
Input Impedance: Greater than 10 K ohms, bal-
anced. Greater than 5 K ohms, unbalanced.
Input Sensitivity: Settings include 0.775 volts or
1.4 volts for standard 1 kHz power, or a 26 dB voltage
gain. (see Section 4.4 for more information).
Output Connectors: A multifunction, high-current
output block is provided. Crown output blocks include
three pairs of connectors for each channel (a total of
12 connectors). This allows multiple loudspeakers to
be easily connected to each channel. High current
screw terminals and banana jacks are provided which
accept spade lugs, banana plugs or bare wire.
Output Impedance: Less than 10 milliohms in series
with less than 2.5 microhenries. (see Figure 6.5).
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. Chan-
nel 1 controls are active; Channel 2 controls are
removed from operation.
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.
If unreasonable operating conditions occur, the pat-
ented ODEP circuitry will proportionally limit the drive
level to protect the output transistor stages, particu-
larly 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 tem-
perature, the transformer will automatically reset itself.
Controlled slew rate voltage amplifiers protect against
RF burnouts. And input overload protection is pro-
vided by the input compressors 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.
Construction
Steel chassis with durable black finish, aluminum
front panel with Lexan overlay, and specially de-
signed flow-through ventilation from front to back
panels.
Cooling: Internal heat sinks with on-demand, pro-
portional forced-air cooling controlled by ODEP.
Includes custom heat diffusers and patented cir-
cuitry to promote uniform dissipation.
Dimensions: 19 inch (48.3 cm) standard rack
mount width (EIA RS-310-B), 5.25 inch (13.3 cm)
height, 15.875 inch (40.3 cm) depth behind mount-
ing surface, and 2.875 inches (7.3 cm) in front of
mounting surface. Allow 3 inches (7.6 cm) behind
the back panel for adequate air flow. (see Figures
3.1 and 3.2).
Approximate Weight: 77 pounds, 9 ounces (35.2
kg) net; 88 pounds, 10 ounces (40.2 kg) shipping
weight.
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