Connector Information, Introduction and Performance Features
General Information, con’t
6. When discarding the unit, comply with local rules or regulations. Batteries should never be thrown away or incinerated but disposed of in accordance with the local regulations concerning battery dis- posal.
7. For additional information on the MC303 and other McIntosh Products please vist the McIntosh Web Site at www.mcintoshlabs.com.
8.When the MC303 is operated in the USA or Canada and the main fuse, located on the rear panel, is in need of replace- ment use only the following part:
Bussman
Connector and Cable Information
XLR Connectors
Below is the Pin configuration for the XLR Balanced Input Connectors on the MC303. Refer to the diagram for con- nection:
PIN 1: Shield/Ground
PIN 2: + Output
PIN 3: - Output
Power Control Connector
The MC303’s Power Control Inputs receive On/Off signals of +5 volts. An additional connection
is for controlling the illumination of 
the MC303 Power Output Meters.
The 1/8 inch stereo mini phone plug
connects to a McIntosh A/V Control Center Power Control Output.
Note: The Power Control Connecting Cable is available from the McIntosh Parts Department:
Data and Power Control Cable Part No.
Six foot, shielded 2 conductor, with 1/8 inch stereo mini phone plugs on each end.
Introduction
plifier circuitry uses Thermal Trak1 Output Transistors for lower distortion and cool operation.
• Balanced and Unbalanced Inputs
Balanced connections guard against induced noise and al- low long cable runs without compromising sound quality.
• Power Guard
The patented McIntosh Power Guard circuit prevents the amplifier from being over driven 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 MC303 will have a long and trouble free operating life.
• Patented Autoformer
McIntosh designed and manufactured Output Autoformers provide an ideal match between the amplifier output stages and speaker loads of 2, 4 and 8 ohms. The Autoformers also provide perfect DC protection for your valuable loud- speakers.
• Special Power Supply
A regulated Power Supply, a very large Power Transformer and Capacitors ensure stable noise free operation even though the power line varies.
• Illuminated Power Meter
The Illuminated Power Output Watt Meter on the MC303 is peak responding, and indicates the power output of the amplifier. The Front Panel Meter Illumination may be switched Off at any time.
Now you can take advantage of traditional McIntosh | • Fiber Optic Solid State Front Panel Illumination | |
standards of excellence in the MC303 Power Amplifier. | The even illumination of the Front Panel is accomplished | |
The 300 watt high current output per channel will drive | by the combination of custom designed Fiber Optic Light | |
any high quality loudspeaker system to its ultimate per- | Diffusers and extra long life Light Emitting Diodes | |
formance. The MC303 reproduction is sonically transpar- | (LEDs). | |
ent and absolutely accurate. The McIntosh Sound is “The | • Glass Front Panel and Super Mirror Chassis Finish | |
Sound of the Music Itself.” | ||
Performance Features | The famous McIntosh Illuminated Glass Front Panel and | |
the Stainless Steel Chassis with Super Mirror Finish en- | ||
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• Power Output | sures the pristine beauty of the MC303 will be retained for | |
The MC303 is a Power Amplifier with a capability of 300 | many years. | |
watts per channel (all channels driven) into 2, 4 or 8 ohm |
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speakers with less than 0.005% distortion. The Power Am- | 1 ThermalTrak™ and ON Semiconductor are trademarks of Semicon- | |
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| ductor Components Industries, LLC | |
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