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Power
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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 mode.
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Voltage Gain to 1-kHz, 8-ohm rated output;
132:1 ±6% or 42 dB ±1 dB gain at
0.775-volt sensitivity;
71:1 ±12% or 37 dB ±1 dB gain at
1.4-volt sensitivity; 20:1 ±3% or 26 dB ±0.25
dB gain at the maximum level setting.
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AC Line Current,
Current, voltage and frequency requirements are provided on the
unit’s back panel.
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AC Line Connector: 10 AWG cordset with NEMA TT30P plug is provided on
120 VAC, 60 Hz North American units.
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At Idle: All units draw 90 watts or less
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Required AC Mains: 50 or 60 Hz; 100-, 120-, 200-,
208-, 230-, 240-VAC (±10%).
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Performance
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Controlled Slew Rate: (Slew rates are limited to
useful levels for ultrasonic/RF protection.)
Greater than 30 volts per microsecond
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Frequency Response: ±0.1 dB from 20 Hz to 20 kHz at
1 watt.
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Phase Response: ±10 degrees from 10 Hz to 20
kHz at 1 watt.
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Signal-to-Noise Ratio,A-weighted:
Better than 105 dB below rated 1-kHz power.
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Total Harmonic Distortion (THD):
1-kHz rated power, 0.05% or less true THD.
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Damping Factor: Greater than 1,000 from 10 Hz to
400 Hz.
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Controls
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Compressor: A three-position back-panel
switch is used to control each channel’s
input compressor. The "fast"
setting provides an attack time of 4
milliseconds and a release time of 300
milliseconds; the "slow" setting
provides an attack time of 12 milliseconds
and a release time of 600 milliseconds; the
"off" setting defeats
output-driven compression.
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Loudspeaker Offset Integration:
A two-position back-panel switch for each
channel used to turn the loudspeaker
protection circuitry on and off. The
circuitry protects against DC, off-center
woofer cone movement, and unwanted subsonic
and ultrasonic frequencies.
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Enable: A front-panel push button used to turn the
amplifier on and off.
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Level: A front-panel rotary potentiometer for each channel with
31 detents used to control the output level.
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Input Ground Lift: A two-position back-panel switch
located on the PIP2-FXQ used to isolate the
input audio signal grounds from the AC
(chassis) ground.
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Sensitivity: A three-position back-panel
switch for each channel used to select input
sensitivity: 0.775 volts or 1.4 volts
for standard 1-kHz power, or a 26 dB voltage
gain.
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VZ Mode: A four-position switch for each
channel inside the front panel used to
control the switching mode of the VZ power
supplies.
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Stereo/Mono: A three-position back-panel switch used to select
Stereo, Bridge-Mono or Parallel-Mono mode.
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Indicators
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Enable: An amber front-panel LED that shows the on/off
status of the low-voltage power supply.
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Signal/IOC: A green front-panel LED for each channel 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.
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ODEP: An amber front panel LED for each channel 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.
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ILoad/ILimit: A two-color (green/red) LED for
each channel that shows load current and
limit current. They glow green to indicate
load current flowing out the amplifier, and
they turn red when maximum current is being
delivered to the load.
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Input/Output
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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.
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Input Connectors: Balanced three-pin XLR and
balanced ¼-inch(6.35-mm) TRS connectors are
provided on the factory-installed PIP2-FXQ .
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Input Impedance: Greater than 10 kohms, balanced.
Greater than 5 kohms, unbalanced.
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Input Sensitivity: Settings include 0.775 volts or
1.4 volts for standard 1 kHz power, or
a 26 dB voltage gain.
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Output Signal Stereo: Unbalanced, two-channel
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DC Output Offset: ±10 millivolts.
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Output Bridge-Mono: Balanced, single-channel.
Channel 1 controls are active; Channel 2
controls are by passed
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Output Parallel-Mono: Unbalanced,
single-channel. Channel 1 controls are
active; Channel 2 controls are removed from
operation.
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Protection
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Construction
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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 loudspeakers from input/output
DC and turn-on/turn-off transients
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Steel chassis with durable black finish, aluminum front
panel with Lexan overlay, and specially
designed flow-through ventilation from front
to back panels.
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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. And input overload protection is
provided by the input compressors and
current-limiting resistance at the input.
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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.
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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.
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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 mounting
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.
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Accessories:Crown PIP and PIP2 modules
including IQ-PIP modules.
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Approximate Weight: 77 pounds, 9 ounces (35.2 kg) net; 88 pounds, 10
ounces (40.2 kg) shipping weight.
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