User manual MCINTOSH MX 113

[. . . ] This unit is capable of producing high sound pressure levels. Continued exposure to high sound pressure levels can cause permanent hearing impairment or loss. User caution is advised and ear protection is recommended when playing at high volumes. Caution: to prevent electrical shock do not use this (polarized) plug with an extension cord, receptacle or other outlet unless the blades can be fully inserted to prevent blade exposure. [. . . ] This provides even Front Panel Illumination, together with the extremely long life LEDs. Glass Front Panel and Super Mirror Chassis Finish The famous McIntosh Illuminated Glass Front Panel with a three dimensional look and the Stainless Steel Chassis with Super Mirror Finish ensures the pristine beauty of the MC402 will be retained for many years. · Performance Features · Power Output The MC402 consists of two separate power amplifier channels, each capable of 400 watts into 2, 4 or 8 ohm speakers with less than 0. 005% distortion. Exclusive Double Balanced Circuity Each channel of the MC402 consists of two balanced power amplifiers operating in push-pull with their outputs combined in a McIntosh Autoformer. This double balanced configuration from input to output cancels virtually all distortion. Patented Autoformers 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 Loudspeakers. Patented Power Guard Both channels include the patented McIntosh Power Guard circuit that prevents the amplifier from being over driven into clipping, with its harsh distorted sound that can also damage your valuable Loudspeakers. Patented Sentry Monitor with Thermal Protection McIntosh Sentry Monitor power output stage protection circuits ensure the MC402 will have a long and trouble free operating life. Built-in Thermal Protection Circuits guard against overheating. Power Control The McIntosh Power Control Circuit allows for remote turn-on of the MC402 Power Amplifier from a McIntosh Audio/Video Control Center or Preamplifier. If any additional McIntosh Power Amplifiers are part of the system a delayed Power Control Output Trigger is available. For additional instruction on making Loudspeaker Connections contact your McIntosh Dealer or McIntosh Technical Support. Spade lug or prepared wire connection: Insert the spade lug connector or prepared section of the cable end into the terminal side access 6. Attach the Terminal Connections Cover, with the five previously removed screws, to the Rear Panel of the MC402 Amplifier. Connect the MC402 power cord to an active AC outlet. Terminal Connections Cover Cover Mounting Screw Location Cover Mounting Screw Locations Cable Openings Figure 7 10 Cover Mounting Screw Locations How to Connect for Stereo McIntosh Audio Control Center To AC Outlet Right Loudspeaker 4 ohm Left Loudspeaker 4 ohm 11 How to Connect for Mono Parallel Caution: The supplied AC Power Cord should not be connected to the Rear Panel of the MC402 Amplifier until after the Loudspeaker Connections have been made and the supplied protective Terminal Connections Cover has been installed. Failure to observe this could result in Electric Shock. 1. For Remote Power Control, connect a power control cable from the Audio Control Center or Preamplifier Power Control Out to the MC402 Power Control In. Connect a cable from the Balanced Output of a McIntosh Preamplifier or Control Center to the MC402 R/MONO Balanced Input. Note: An optional hookup is to use an unbalanced cable. Banana plug connection: Insert the banana plug into the hole at the top of the terminal. Tighten the top portion of the terminal post and the set screw to secure the banana plug in place. Note: The Banana Plugs are for use in the United States and Canada only. 3. Prepare three Loudspeaker Hookup Cables, one twelve inch (30. 48 cm) and one thirteen inch (33. 02 cm) Jumper Cables, along with the desired length in a Loudspeaker Hookup Cable that attaches to the MC402 Power Amplifier Output Terminals by choosing one of the methods below: Bare wire cable ends: Carefully remove sufficient insulation from the cable ends, refer to figures 8, 9 & 10. If the cable is stranded, carefully twist the strands together as tightly as possible. Note: If desired, the twisted ends can be tinned with solder to keep the strands together, or attach spade lug and/or banana connector. 4. Remove the five screws from the MC402 Chassis Rear Panel and Left Side. Connect the prepared twelve inch (30. 48 cm) Jumper Cable between the two - Output terminals and the thirteen inch (33. 02 cm) Jumper Cable between the two appropriate Impedance + Output Terminal as outlined in the chart located on the next page. [. . . ] In the rare event of a power amplifier output circuit failure, the McIntosh Autoformer provides absolute protection from possible damage to your valuable Loudspeakers. The unequaled expertise of McIntosh in the design and manufacturing of Autoformers is legendary in the high fidelity industry. McIntosh engineers know how to do it right. Protection Circuits The different types of protection circuits incorporated in the MC402 insure a long and safe operating life. [. . . ]