Page 2 - IMPORTANT SAFETY
2 The lightning flash with arrowhead, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “danger- ous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. 1. Read these instructions. 2. ...
Page 4 - Connector Information, Introduction and Performance Features
4 XLR Connectors Below is the Pin configuration for the XLR Balanced Input Connectors on the MC1.2KW. Refer to the diagram for connection: PIN 1: Shield/Ground PIN 2: + Output PIN 3: - Output Power Control Connector The MC1.2KW’s Power Control Inputs receive On/Off signals of +5 volts. An additional...
Page 5 - The following dimensions can assist in determining the; Front View of the MC1.2KW
5 Dimensions Dimensions The following dimensions can assist in determining the best location for your MC1.2KW. There is additional information on the next page pertaining to installing the MC1.2KW into cabinets. 17- 3/4 " 45.09cm 11" 27.94cm 12- 5/16 " 31.27cm 18" 45.72cm 19- 1/2 ...
Page 6 - Custom Cabinet Cutout; When the MC1.2KW is installed together with other McIntosh
6 Installation Installation The MC1.2KW can be placed upright on a table or shelf, standing on its four feet. It also can be custom installed in a piece of furniture or cabinet of your choice. The four feet may be removed from the bottom of the MC1.2KW when it is custom installed as outlined below. ...
Page 7 - Rear Panel Connections and Switch
7 Caution: The Loudspeaker Negative Connections are above chassis ground. Do not combine any connections to- gether, ground them or connect with another MC1.2KW. Rear Panel Connections and Switch Connect the MC1.2KW power cord to a live AC outlet. Refer to the rear panel to determine the correct vol...
Page 8 - How to Connect
8 terminals so the lugs cannot slip out. Refer to figures 4, 5 & 6. 4. Connect the loud- speaker hookup ca- ble to the output terminals that match the impedance of your loudspeaker, being careful to observe the correct polarities. Output impedance connections of 2 ohms, 4 ohms and 8 ohms are pro...
Page 9 - McIntosh Preamplifier; Connect to
9 McIntosh Loudspeaker How to Connect McIntosh Preamplifier Connect to AC Outlet
Page 10 - How to Connect for Bi-Amp
10 Refer to figures A and B. Connection Method for use outside the United States and Canada: Attach the previously prepared bare wire cable ends into the spade lug connectors and secure the connections. Insert the spade lug connector or prepared section of the cable end into the terminal side access...
Page 12 - Front Panel Displays and Switches
12 Front Panel Displays and Switches Standby Power On Indicator Meter indicates the Power Output of the Amplifier LED indicates when Amplifier POWER GUARD circuit activates POWER Switch Turns AC Power On/Off, or On/Remote METER Switch selects the display modes of the Power Output Meter and Meter Ill...
Page 13 - How to Operate; Figure 8
13 electronically held to this power level until a higher power peak passes through the amplifier. The meter pointer will then rise to the newer higher indication. If no further power peaks are reached, the meter pointer will very slowly return to its rest position or lower power level. The decay ra...
Page 14 - Technical Description; Top View of the MC1.2KW
14 Technical Description McIntosh Laboratory, the company who introduced the world’s first amplifier that could be called “High Fidel- ity”, has done it again. The McIntosh engineering staff has created a power amplifier without compromise, using the most advanced McIntosh circuit design concepts. A...
Page 15 - Design Philosophy; Block Diagram
15 Technical Description cies is less than 0.002%. The true distortion readings on the MC1.2KW are so low, it takes special measuring techniques to make accurate readings. The MC1.2KW can deliver the best possible performance from any type of high quality loudspeaker system. Creating an amplifier wi...
Page 16 - Input Test Signal
16 Autoformers All solid state power amplifier output circuits work best into what is called an optimum load. This optimum load may vary considerably from what a loudspeaker requires. In the case of more than one loudspeaker connected in parallel, the load to the power amplifier may drop to two ohms...
Page 17 - Technical Description, con’t; Power Supply Circuits
17 Technical Description, con’t audible and inaudible distor- tion levels exceeding 40%. The audible distortion is unpleasant to hear, but the inaudible ultrasonic distortion is also undesirable, since it can damage valuable loudspeaker system tweeters. You will never experience the harsh and damagi...
Page 18 - Note: Refer to the rear panel of the MC1.2KW for the correct
18 Specifications Specifications Power Output Minimum sine wave continuous average power output is: 1,200 watts into 2 ohm load 1,200 watts into 4 ohm load 1,200 watts into 8 ohm load Output Load Impedance 2, 4 or 8 ohms Rated Power Band 20Hz to 20,000Hz Total Harmonic Distortion 0.005% maximum harm...