McIntosh C49 Service Manual

2
1. Unless otherwise noted, all voltages indicated on the
schematics are measured under the following conditions:
a. AC input at rated voltage marked on rear panel.
b. All voltages are +/-10% with respect to ground. A
high impedance (10 megaohm) voltmeter must be used.
2. Unlessotherwisespecied:
a. Resistor values are in ohms.
b. Capacitor values are microfarads (uF).
c. Inductor values are in microhenries (uH)
3. On PC board drawings, Square pad indicates:
a. Polarized Capacitors - Positive
b. Diodes - Cathode
c. Others - Pin 1
4. WARNING
Parts marked with the symbol have critical
characteristics. Use only replacement parts recom-
mended by the manufacturer.
5. Use McIntosh Remote Control Model HR085.
PERFORMANCE SPECIFICATIONS
NOTES
Frequency Response
+0, -0.5dB from 20Hz to 20,000Hz
+0, -3dB from 15Hz to 100,000Hz
Total Harmonic Distortion
0.005% from 20Hz to 20,000Hz
Rated Output
2.5V Unbalanced, 5V Balanced (Main)
450mV (Fixed Output)
Maximum Voltage Output
8V RMS Unbalanced, 16V RMS Balanced
Sensitivity (for rated output)
High Level, 450mV Unbalanced, 900mV Balanced
Phono MM, 4.5mV
Phono MC, 0.45mV
Signal To Noise Ratio (A-Weighted)
High Level - 100dB (Below rated output)
MM Phono - 82dB (Below 5mV input)
MC Phono - 80dB (Below 0.5mV input)
Input Impedance
High Level - 22K ohms Unbalanced
44k ohms Balanced
Phono MM - 50 to 800pF, in 50pF steps;
47K ohms
Phono MC - 25, 50, 100, 200, 400 or 1,000 ohms;
100pF
Maximum Input Signal
High Level, 5V Unbalanced, 10V Balanced
Phono MM, 80mV
Phono MC, 8mV
Volt age Ga in
High Level to Fixed Output: 0dB
High Level to Main Output: 15dB
Phono MM to Record Output: 40dB
Phono MC to Record Output: 60dB
Output Impedance
100 ohms Unbalanced
200 ohms Balanced
Headphone Load Impedance
100 ohms to 600 ohms
Digital Input Sample Rates (DA1)
Optical: PCM - 16Bit, 24Bit - 32kHz to 192kHz
Coaxial: PCM -16Bit, 24Bit - 32kHz to 192kHz
MCT: PCM, SACD, -16Bit, 24Bit - 32kHz to 192kHz
USB: PCM - 16Bit, 24Bit, 32Bit - 32kHz to 384kHz
DXD - DXD352.8kHz, DXD384kHz
DSD - DSD64, DSD128, DSD256
Power Control and Trigger Output
12VDC, 25mA
Power Requirements
Field AC Voltage conversion of the C49 is not possible. The C49
is factory congured for one of the following AC Voltages:
100 Volts, 50/60Hz at 30 watts
110 Volts, 50/60Hz at 30 watts
120 Volts, 50/60Hz at 30 watts
220 Volts, 50/60Hz at 30 watts
230 Volts, 50/60Hz at 30 watts
240 Volts, 50/60Hz at 30 watts
Standby Power, less than 0.5 watts
Note: Refer to the rear panel of the C49 for the correct voltage.
Overall Dimensions
Width is 17-1/2 inches (44.4cm)
Height is 6 inches (15.2cm) including feet
Depth is 18 inches (45.72cm) including the Front Panel, Knobs
and Cables
Weight
23 pounds (10.4 kg) net, 37.5 pounds (17 kg) in shipping carton
Shipping Carton Dimensions
Width is 27 inches (68.6cm)
Height is 12 inches (30.5cm)
Depth is 25 inches (63.5cm)
20 20k50 100 200 500 1k 2k 5k 10k
0
+6
-6
+12
-12
dB
Hz
C49 Tone
Control Curves

McIntosh C49 Specifications

General

Brand	McIntosh
Model	C49
Category	Amplifier
Language	English