McIntosh MA6500 Service Manual

SERVICE MANUAL
INTEGRATED AMPLIFIER
1
CD 2 MONO SPEAKERSCD 1
2
TUNER MUTEVIDEO LOUDPH AUX / TA P E
HEADPHON ES
SE N SO R
STANDBY O N /
VOLUME
POW ER GUAR D
LEFT R IG HT
TREBLEBASS
BALANCE
LR
20
200
2.0
. 20
. 02
POWER OUTPUT
- 40
- 30
- 20
- 10
0
DECIB EL S
WATTS
4
0
0
20
200
2.0
. 20
. 02
POWER OUTPUT
- 40
- 30
- 20
- 10
0
DECIBELS
WAT TS
4
0
0
Performance Specifications ........................................ 2
Notes ......................................................................... 3
Rear Panel .................................................................. 4
Section Location ........................................................ 4
Block Diagram ...................................................... 5 - 8
Interconnection Diagram .................................... 9 - 10
Input Driver Schematic and PCB ....................... 11 - 18
Heatsink Schematic and PCB ............................ 19 - 20
Lamp Schematic and PCB ................................. 19 - 20
PG Display Schematic and PCB ........................ 21 - 22
Control Schematic and PCB .............................. 21 - 22
Tone Schematic and PCB .................................. 23 - 26
Parts List ............................................................ 25 - 28
Exploded View and Parts List ............................. 29 - 31
Repacking Instructions ............................................. 33
CONTENTS

McIntosh MA6500 Specifications

Power Output

RMS Power Output at 8 ohms	120 W
RMS Power Output at 4 ohms	200 W
RMS Power Output at 2 ohms	250 W

Distortion and Noise

Total Harmonic Distortion	0.005%
Intermodulation Distortion	0.005%
S/N Ratio (A-Weighted) Power amp	110 dB below rated output

Input and Output

Maximum Voltage Output	8 V from 20Hz to 20kHz
Input Sensitivity High level	250 mV for 2.5 V rated output
Maximum Input Signal High level	10 V

Impedance and Gain

Output Load Impedance	2, 4, or 8 ohms
Input Impedance High level	22k ohms
Voltage Gain High level to tape	0 dB

Weight and Dimensions

Dimensions (h x w x d)	13.7 x 44.5 x 46 cm
Weight net	18.6 kg
Weight shipping	27.3 kg