User manual MCINTOSH MX 113

[. . . ] 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. Attention: pour pevenir les chocs elecriques pas utiliser cette fiche polarisee avec un prolongateur, une prise de courant ou un autre sortie de courant, sauf si les lames peuvent etre inserees afond ans en laisser aucune partie a decouvert. [. . . ] The Peak Watt Hold Mode allows the meters to temporarily stay at the highest power output and then slowly decay. Fiber Optic Solid State Front Panel Illumination The Illumination of the Front Panel is accomplished by the combination of custom designed Fiber Optic Light Diffusers and Light Emitting Diodes (LEDs). 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. 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. 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. 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. Insert the Loudspeaker Hookup Cable Ends through the openings of the supplied Terminal Connections Cover and connect to the output terminals that match the Loudspeakers' Impedance, being careful to observe the correct polarities. Output impedance connections of 1 ohms, 2 ohms and 4 ohms are provided. If the Loudspeakers' Impedance is in-between the available connections, use the nearest lower impedance connection. WARNING: Loudspeaker terminals are hazardous live and present a risk of electric shock. [. . . ] This increase in temperature will result in a reduced life expectancy for the amplifier. The Autoformer creates an ideal match between the power amplifier output stage and the Loudspeaker. A McIntosh amplifier with an Autoformer can be used to safely drive multiple speakers without reducing the life expectancy of the power amplifier. Its frequency response exceeds that of the output circuit itself, and extends well beyond the audible range. [. . . ]