Crown International
1718 W. Mishawaka Rd.
Elkhart, IN 46517-9439
TEL: 574-294-8200
FAX: 574-294-8FAX
www.crownaudio.com
MT 1200
04/05 138311-1
Specifications subject to change without prior notice. Latest
information available at www.crownaudio.com.
Crown and Crown Audio are registered trademarks of Crown
International, Inc. Printed in U.S.A.
© 2005 Crown Audio
®
, Inc.
Architectural & Engineering Specifications
M I C R O T E C H S E R I E S
Micro-Tech 1200 (120 V, 60 Hz models)
The Crown
®
MT 1200 power amplifier shall be a solid-state two-chan-
nel model employing multi-mode (AB+B) grounded bridge(TM) output
circuitry.
The outputs shall be switchable as stereo, bridged-mono or parallel-mono
modes of operation. The bridged-mono mode shall bridge the outputs to
provide increased output voltage. The parallel-mono mode shall parallel the
outputs to provide increased output current.
The output impedance of each channel shall be less than 10 milliohms in
series with less than 2 microhenries in stereo mode.
The amplifier shall contain protection circuitry which limits the drive level
placed on the output devices before their SOA (Safe Operating Area) is
exceeded. This protection circuitry shall calculate the instantaneous volt-
age across and current through the output devices while factoring in their
simulated junction temperatures to predict how close they are to their
operating limits. This protection will be called “ODEP.”
The amplifier shall contain controlled slew-rate voltage circuitry to protect
it against radio frequency interference burnouts. It shall also be protected
from current overload at its output stage. The slew rate of the amplifier
shall be greater than 13 volts per microsecond in stereo mode.
The amplifier shall temporarily go into a stand-by mode if its power trans-
former becomes excessively hot and shall automatically resume normal
operation once it has cooled to a safe operating temperature.
Front-panel controls shall include an enable on/off switch.
Rear-mounted controls shall include a ground lift switch to isolate the
signal ground from the chassis ground, a switch which selects between
stereo, bridged-mono and parallel-mono modes of operation, a gain
control for each channel, and two push-button reset switches to reset the
circuit breakers for the high-voltage power supplies.
Internal controls shall include an input sensitivity switch to select between
0.775 V, 1.4 V or a fixed voltage gain of 26 dB for full rated output.
Front panel indicators shall include an amber power enable indicator and
an amber protection system indicator (ODEP) for each channel which shall
normally be illuminated to confirm the availability of reserve thermody-
namic energy and which shall dim in proportion to limiting when the power
demands of the output stages have been exceeded.
The power amplifier shall meet or exceed the following performance
criteria. Input sensitivity for rated output: 26 dB voltage gain (unbalanced).
Rated FTC output in stereo mode with less than 0.1% THD: 425 watts per
channel (20 Hz to 20 kHz) into 4 ohms; 295 watts per channel (20 Hz to 20
kHz) into 8 ohms. Rated FTC output in bridged-mono mode with less than
0.1% THD: 850 watts (20 Hz to 20 kHz) into 8 ohms; 585 watts (20 Hz to
20 kHz) into 16 ohms. Hum and noise: at least 105 dB (A weighted) below
full rated output power. Phase response: 10 degrees from 10 Hz to 20 kHz
at 1 watt. Frequency response: 20 Hz to 20 kHz, 0.1 dB at 1 watt into 8
ohms per channel in stereo mode. Damping factor: greater than 1000 from
10 to 400 Hz into 8 ohms. Intermodulation distortion (SMPTE): less than
0.05% from 163 milliwatts to rated power into 8 ohms in stereo mode.
Harmonic distortion at rated power into 8 ohms per channel (stereo mode):
less than 0.05% from 20 Hz to 1 kHz and increasing linearly to less than
0.1% at 20 kHz.
The amplifier shall be safe when driving any kind of load—even highly
reactive ones.
The power requirements shall be 120 VAC at 60 Hz. At idle, the amplifier
shall draw 100 watts or less.
The amplifier chassis shall be constructed of steel with a durable black
finish and shall be designed for flow-through fan-assisted ventilation from
the front panel to the side panels. The amplifier shall have an aluminum
front panel with Lexan overlay and air filter media.
The dimensions of the amplifier shall allow for 19 inch (48.3 cm) EIA stan-
dard (RS-310-B) rack mounting. The amplifier shall be 3.5 inches (8.9 cm)
tall and 16 inches (40.6 cm) deep behind the rack-mounting surface.
The amplifier shall weigh 41 pounds, 1 ounce (18.6 kg) and shall have a
center of gravity approximately 6 inches (15.2 cm) behind the front panel.
The amplifier shall be designated the Crown Micro-Tech 1200.
