Performance Specifications; Notes - McIntosh MC1.2KW Service Manual

PERFORMANCE SPECIFICATIONS

Power Output
Minimum sine wave continuous average power output
is:
1,200 watts into 2 ohm load
1,200 watts into 4 ohm load
1,200 watts into 8 ohm load
Output Load Impedance
2, 4 or 8 ohms
Rated Power Band
20Hz to 20,000Hz
Total Harmonic Distortion
0.005% maximum harmonic distortion at any power level
from 250 milliwatts to rated power, 20Hz to 20,000Hz
Dynamic Headroom
2dB
Frequency Response
+0, -0.25dB from 20Hz to 20,000Hz
+0, -3dB from 10Hz to 100,000Hz
Input Sensitivity (for rated output)
2.5 Volt Unbalanced
5 Volt Balanced
Signal To Noise Ratio (A-Weighted)
120dB below rated output, Unbalanced
124dB below rated output, Balanced
Intermodulation Distortion
0.005% maximum, if the instantaneous peak power output
does not exceed twice the rated power output for any combi-
nation of frequencies from 20Hz to 20,000Hz.
1. The heavy lines on the schematic denote the primary
signal path.
2. Unless otherwise noted, all voltages indicated on the
schematics are measured under the following conditions:
AC input at rated voltage marked on rear panel.
a.
b. All voltages are +/-10% with respect to ground. A
high impedance (10 megaohm) voltmeter must be used.
3. Unless otherwise specified:
a. Resistor values are in ohms.
b. Capacitor values are microfarads (uF).
c. Inductor values are in microhenries (uH).
Wide Band Damping Factor
Greater than 40
Input Impedance
10,000 ohms
Power Guard
Less than 2% THD with up to 14dB overdrive at 1,000Hz
Power Requirements
100 Volts, 50/60Hz at 15 Amps
110 Volts, 50/60Hz at 12.5 Amps
120 Volts, 50/60Hz at 12 Amps
220 Volts, 50/60Hz at 7.5 Amps
230 Volts, 50/60Hz at 6.5 Amps
240 Volts, 50/60Hz at 6.5 Amps
Standby: 0.5 watts
Note: Refer to the rear panel of the MC1.2KW for the
correct voltage.
Overall Dimensions
Width is 17-3/4 inches (45.09cm)
Height is 12-5/16 inches (31.27cm) including feet
Depth is 22 inches (55.88cm) including the Front Panel
and Cables
Weight
147 pounds (66.7 kg) net, 172 pounds (78.0 kg) in ship-
ping carton
Shipping Carton Dimensions
Width is 31 inches (78.74cm)
Depth is 28 inches (71.12cm)
Height is 17-1/4 inches (43.82cm)

NOTES

4. On PC board drawings, Square pad indicates:
a. Polarized Capacitors - Positive
b. Diodes - Cathode
c. Others - Pin 1
5. WARNING
Parts marked with the symbol
characteristics. Use only replacement parts recom-
mended by the manufacturer.
2
have critical