User manual MCINTOSH MCC302

[. . . ] MCC302 Power Amplifier MCC302M Owner's Manual McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York 13903-2699 Phone: 607-723-3512 FAX: 607-724-0549 WARNING - TO REDUCE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL. To prevent the risk of electric shock, do not remove bottom cover. No user serviceable parts inside. IMPORTANT SAFETY INSTRUCTIONS! PLEASE READ THEM BEFORE OPERATING THIS EQUIPMENT. General: 1. [. . . ] A line level summed output is provided to drive an external subwoofer power amplifier. Gold Plated Terminals McIntosh provides gold plated input and output terminals on the amplifiers for superior corrosion resistance. Speaker wires to 10 AWG and DC input wires to 4 AWG can be accommodated. Performance Features · Power Output The MCC302 consists of two separate power amplifier channels, each capable of 150 watts into 4 ohm speakers with less than 0. 005% distortion. Bridgeable Channels The MCC302 includes two 150 watt amplifier channels. Both channels can be set in bridged configuration for 600 watts output into a 4 ohm loudspeaker with less than 0. 008% distortion. High Current Output A peak output current of 30 amperes ensures that the MCC302 will successfully drive high quality loudspeakers, such as McIntosh, for a truly exciting sound experience. · · · · · · Equalizer and Variable Crossover Filters The one band equalizer has a center frequency that is variable from 40 Hz to 2, 000 Hz which can be either cut or boosted ±12db. 12dB per octave high pass filters with variable corner frequencies from 50Hz to 120Hz and 12dB per octave low pass filters with variable corner frequencies from 50Hz to 120Hz. Power Guard and Sentry Monitor All channels include the patented McIntosh Power Guard circuit that prevents the amplifier from being overdriven into clipping with its harsh distorted sound that can also damage your valuable loudspeakers. McIntosh Sentry Monitor power output stage protection circuits are present on all channels to ensure the MCC302 will have a long and trouble free operating life. Speaker Protection If for any reason, a DC (Direct Current) voltage appears at the speaker output terminals, a built-in circuit turns off the amplifier power supplies to prevent damage to your valuable loudspeakers. 4 · · · Dimensions Dimensions The following dimensions can assist in determining the best location for your MCC302. There is additional information on the next page pertaining to installing the MCC302 into your vehicle. Top View of the MCC302 13-21/32" 34. 69cm 11. 00" 27. 94cm 2-11/16" 6. 82cm 12-1/2" 31. 75cm 11-7/8" 30. 16cm Side View of the MCC302 11" 27. 93cm 11/32" 10. 93cm 2-15/16" 7. 49cm 5 Installation Installation It is recommended that a professional who is skilled in all aspects of installation and operation install the MCC302 and any associated mobile audio equipment. Amplifier Ventilation Always provide adequate ventilation for the MCC302. The amplifier requires an adequate airflow into the cooling fans, which are located on the left side of the amplifier. Be sure to provide at least 1-1/2 inches clearance in front of the cooling fans and 1 inch clearance at the sides of the heatsinks. The cooling fans are controlled by temperature sensors, attached to the interior of the tunnel. If the program material contains sustained loud passages demanding high power, the fans will turn-on to increase cooling. If cooling is still not sufficient, additional heating will shut down the amplifier's internal power supply completely and the Power Guard LEDs will light. The fans will continue to run and once normal temperatures are restored, operation will resume. The amplifier can be mounted vertically or horizontally and may be located under a seat if adequate clearance is available. The preferred installation method is to mount the amplifier directly to the vehicle frame using the hardware supplied with the amplifier. It is not recommended that the amplifier be mounted under the hood or in a location where it will be directly exposed to the elements. Connect a wire from a McIntosh Control Center with Power Guard to the MCC302 PG Connector on the right side of the amplifier. [. . . ] Adjust the CROSSOVER FREQUENCY Control for the Crossover Frequency that is recommended by the Manufacturer of the Loudspeaker for the best performance. Refer to figure 4. 11 How to Replace the Fuses How to Replace the Fuses If the MCC302 produces no sound, there is no Illumination of the Nomenclature on the Top Glass Panel, and the power connections seem secure, one or more of the Amplifier's Fuse(s) may have failed. Under normal operating conditions your amplifier's fuses should not fail. Replacing the fuse, if there is problem in the amplifier, may incur a risk of further damage. [. . . ]