Mechanical Specifications; Electrical Specifications; Front Panel Facilities - McIntosh C20 Owner's Manual

DIMENSIONS
Chassis: 14-1/2 inches wide; 4-1/2 inches high; 12
inches deep
Front Panel: 15-5/8 inches wide; 4-7/8 inches high
Front Panel Mounting Space Required: 16-3/8 inches
wide; 5 inches high
POWER REQUIREMENTS
117 volts, 50/60 cycles, ac, 35 watts
INPUT SENSITIVITY AND INPUT IMPEDANCE
Auxiliary: 0.25 volt; 470,000 ohms
Tape: 0.25 volt; 470,000 ohms
Tuner 1: 0.25 volt; 470,000 ohms
Tuner 2: 0.25 volt; 470,000 ohms
Phono 1: 2 to 10 millivolts; 47,000 ohms for low-output
cartridge
10 to 70 millivolts; 47,000 ohms for high-output
cartridge
0.1 volt; 220 mmf in series with 47,000 ohms for
Xtal or ceramic cartridge
Phono 2: Same as phono 1
Tape Head 1: 2 to 10 millivolts; 47,000 ohms for low-
output head
10 to 70 millivolts; 267,000 ohms for high-output
head
Tape Head 2: Same as tape head 1
Tape Compare (Monitor): 0.25 volt; 115,000 ohms
FREQUENCY RESPONSE
±0.5db 20 to 20,000 cycles
;
DISTORTION
Less than 0.2% at rated output, 20 to 20,000 cycles
HUM AND NOISE
High-level inputs: 85 db below rated output
2

MECHANICAL SPECIFICATIONS

ELECTRICAL SPECIFICATIONS

FRONT PANEL FACILITIES

Figure 1. C20 Front Panel
WEIGHT
Chassis: 18 pounds
Shipping Weight: 28.5 pounds
FINISH
Anodized gold and black (front panel)
Low-level inputs: less than 2 microvolts at input ter-
minals
MAIN OUTPUT
2.5 volts with rated input
2 output jacks in parallel for each channel
TAPE OUTPUT
0.25 volt with rated input
1 output jack for each channel
LEFT PLUS RIGHT OUTPUT
2.5 volts from generator impedance of 23,000 ohms
VOLTAGE AMPLIFICATION
Low-level inputs to Main Output: 1,000 to 1 (60 db) at
Low-level inputs to Tape Output:
High-level inputs to Main Output:
High-level inputs to Tape Output:
Tape Compare (Monitor) input to
Main Output:
A-C AUXILIARY OUTLETS
1 unswitched for tape machine or turntable,
colored Red
4 switched, colored Black
1000 cycles
100 to 1 (40 db) at
1000 cycles
10 to 1 (20 db)
1 to 1 (0 db)
10 to 1 (20 db)