User manual MCINTOSH MC7108

[. . . ] MC7108 EIGHT CHANNEL POWER AMPLIFIER MC7108 EIGHT CHANNEL POWER AMPLIFIER IMPORTANT SAFETY INSTRUCTIONS THESE INSTRUCTIONS ARE TO PROTECT YOU AND THE MclNTOSH INSTRUMENT. 16. Read all instructions - Read the safety and operating instructions before operating the instrument. Retain Instructions - Retain the safety and operating instructions for future reference. WARNING: TO REDUCE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS INSTRUMENT TO RAIN O MOISTURE. [. . . ] The trouble free life of any electronic instrument is greatly extended by providing sufficient ventilation for proper cooling. 5 HOW TO INSTALL THE MC7108 HOW TO INSTALL THE MC7108 Allow at least 1-1/2 inches (3, 8cm) above the heat sink area to allow the free flow of air. The recommended minimum depth for mounting, including clearance for connectors, is 20 inches (51cm) behind the front mounting panel. If mounted in a custom cabinet, cut out a ventilation hole in the amplifier mounting shelf according to the recommended dimensions. FRONT PANEL DISPLAY A front panel Red LED indicator is provided for each of the four pairs of channels. This indicator turns on when the speaker relays for that specific channel pair turn on. All eight channels of the MC7108 incorporate the Mclntosh POWER GUARD circuit which prevents output clipping with its harsh and damaging distortion. A front panel LED Power Guard indicator is provided for each of the eight channels. The LED lights whenever the power Guard circuit is activated for any particular channel. This indicates that the amplifier is producing its maximum undistorted power output, and that you are being protected from overdrive and clipping. The output level where Power Guard acts will be welt above the rated power due to conservative Mclntosh design philosophy. (If the POWER GUARD indicators turn on and stay on continuously for any given pair of channels, it indicates a problem is present. If this condition occurs, contact your Mclntosh dealer for assistance. ) REAR PANEL AND HOW TO MAKE CONNECTIONS Use high quality input and output connecting cables. Proper cables will insure receiving the best possible performance from your Mclntosh system. Your Mclntosh dealer can advise you on the types and lengths of cables that will work best in your installation, Hookup drawings are included which give graphic information on how to connect the inputs and outputs for each installation configuration. LEVEL (BRIDGED, STEREO and MONO) BRIDGED: Use only the 5 BRIDGED LEVEL control and adjust as desired. The 2. 5V setting is suggested when the MC7108 is being used with a Mclntosh Preamplifier or Control Center. MODE (BRIDGED, STEREO and MONO) Set the MODE switch to the position for the desired operating configuration. 8 CHANNEL IN This connector will accept the outputs of the six audio channels of a Mclntosh C39 or MX 130 A/V Control Center for use in a Mclntosh Home Theater System. Use a male-to-female 25 conductor subminiature " D " (D825) shielded computer type cable from the 8 CHANNEL connector to the 25 pin 6 CHANNEL connector on a Mclntosh C39 or MX130. The six separate outputs from the Control Centers will appear at the MC7108 in the following channel allocation. A power control signal to turn the MC7108 power on and off is also sent on the cable from the Control Center. CHANNEL CHANNEL CHANNEL CHANNEL CHANNEL CHANNEL 1: 2: 3: 4: 5: 6: Center Front Left Surround Left Front Right Front Subwoofer Right Surround REAR PANEL AND HOW TO MAKE CONNECTIONS Connect discrete cables from a C39 or MX130 Area " B " OUTPUTS to channels 7 and 8 to drive loudspeakers in the remote Area " B " . [. . . ] Bridged Pair: Connect a cable from the Common loudspeaker terminal to the MINUS (-) BRIDGED terminal, (Channel 6 +). Connect a cable from the Positive loudspeaker terminal to the Positive ( + ) BRIDGED terminal, (Channel 5 + ). MULTI ROOM CONTROL Connect an optional cable with DIN connectors on each end, (Mclntosh Part No. 170-147) from the MULTI ROOM CONTROL CONNECTOR TO A Mclntosh CR10 system, The control cable allows the CR10 to switch ON the MC7108 speaker relays, only for the remote areas that are active. [. . . ]