McIntosh MC275 Service Manual

MC275
MC275
POWER AMPLIFIER
SERVICE MANUAL
SERIAL NO. ABP1001 And Above
Performance Specifications ..........................................2
Notes ...........................................................................2
Section Location ..........................................................3
Block Diagram .......................................................5 - 6
Interconnection Diagram ........................................7 - 8
Main Schematic and PCB .....................................9 - 16
Terminal Schematic ...................................................14
Terminal PCB......................................................17 - 18
Amplifier Schematic ...........................................19 - 20
Balanced Input / Unbalanced Input /
Power Control / Tube Light Schematic .................21 - 22
Amplifier / Balanced Input / Unbalanced Input /
Power Control / Tube Light PCB ..........................23 - 24
Parts List .............................................................25 - 29
Repacking Instruction ................................................31
CONTENTS
Handcrafted in USA with US
and Imported Parts

McIntosh MC275 Specifications

General

Damping factor	20
Amplifier class	-
Frequency range	10 - 70000 Hz
Output impedance	16 Ω
Audio output channels	2.0 channels
Peak power per channel	75 W
Signal-to-Noise Ratio (SNR)	100 dB
Total Harmonic Distortion (THD)	0.50 %
RMS power output per channel (2 Ohm)	150 W
XLR in	Yes
Audio (L/R) in	2
Audio (L/R) out	6
Speakers connectivity type	Binding post
Purpose	Performance/stage
Product color	Black, Silver
Connectivity technology	Wired
Maximum current	3.6 A
AC input voltage	120 V
AC input frequency	50 - 60 Hz
Package weight	34100 g

Weight and Dimensions

Depth	304.8 mm
Width	419.1 mm
Height	209.6 mm
Weight	30500 g