4
Performance Features
Introduction and Performance Features
Introduction
·
Power Output
The MC126 consists of six separate power amplifier chan-
nels, each capable of 120 watts into 4 ohm speakers with
less than 0.005% distortion. It may also be used as a Three
Channel Amplifier with each channel capable of 275 watts
into 8 ohm speakers.
·
High Current Output
A peak output current of 10 amperes per channel ensures
that the MC126 will successfully drive high quality loud-
speakers such as McIntosh for a truly exciting sound expe-
rience.
·
Power Guard
The MC126s Patented McIntosh Power Guard Circuits
prevent each of the amplifier channels from being
overdriven into clipping, with its harsh distorted sound that
can also damage your valuable loudspeakers.
·
Sentry Monitor and Thermal Protection
McIntosh Sentry Monitor power output stage protection
circuits ensure the MC126 will have a long and trouble free
operating life. Built-in Thermal Protection Circuits guard
against overheating.
Now you can take advantage of traditional McIntosh stan-
dards of excellence in the MC126 Power Amplifier. Six
120 watt high current output channels will drive any high
quality loudspeaker system to its ultimate performance.
The MC126 reproduction is sonically transparent and abso-
lutely accurate. The McIntosh Sound is The Sound of the
Music Itself.
Table of Contents
Safety Instructions ............................................................ 2
Thank You and Please Take a Moment............................. 3
Technical Assistance and Customer Service .................... 3
Table of Contents and General Notes ............................... 4
Introduction ...................................................................... 4
Performance Features ....................................................... 4
Dimensions ....................................................................... 5
Installation ........................................................................ 6
Rear Panel Connections and Switch ................................. 7
How to Connect for Six Channels .................................... 8
How to Connect for Three Channels .............................. 10
Front Panel Displays and Controls ................................. 12
How to Operate............................................................... 13
Specifications ................................................................. 14
Packing Instruction ......................................................... 15
General Notes
1. The following Connecting Cable is available from the
McIntosh Parts Department:
Power Control Cable Part No. 170-202
Six foot, 2 conductor shielded, with two 1/8 inch stereo
mini phone plugs.
2. For additional connection information, refer to the owners
manual(s) for any component(s) connected to the MC126.
3. The MC126 mutes the speaker outputs for approximately two
seconds when first turned on.
4. It is very important that loudspeaker cables of adequate size
be used, so that there will be no power loss. The size is
specified in Gauge Numbers or AWG, (American Wire Gauge).
The smaller the Gauge number, the larger the wire size. The
MC126 Loudspeaker Connection Terminals will accept up to a
10 AWG wire size:
If your loudspeaker cables are 50 feet (38.1m) or less,
use at least 14 Gauge.
If your loudspeaker cables are 100 feet (76.2m) or less,
use at least 12 Gauge.
5. In the event that the MC126 over heats, due to improper
ventilation and/or high ambient temperature, the protection
circuits will activate. The Front Panel Power Guard LEDs
will continuously indicate ON and the audio will be muted.
When the MC126 has returned to a safe operating
temperature, normal operation will resume.
6. The Multi-Channel Input DB25 Connector allows for easy
connecting of a McIntosh MX130/132 or C39 A/V Control
Center, Audio and Power Control connections, to the MC126.
If a McIntosh MSE1 Surround Expander is connected to the
MX130/132 or C39, then discrete Audio and Power Control
Cables should be used between them and the MC126. The
Diagram and Pin Identification list for the Multi-Channel
Input is as follows:
Multi-Channel Amp DB25 Connector Pin Layout
1. Left Front +
14. Left Front Gnd.
2. Center Front +
15. Center Front Gnd.
3. Right Front +
16. Right Front Gnd.
4. N/C
17. N/C
5. Left Su
18. Left Surround Gnd.
6. Right Su
19. Right Surround Gnd.
7. Left Back Su
20. Left Back Surround Gnd.
8. Right Back Su 21. Right Back Surround Gnd.
9. N/C
22. N/C
10. N/C
23. N/C
11. N/C
24. System Calibrate Gnd.
12. System Calibrate
25. Power Control Gnd.
13. Power Control In
Multi-Channel Input
