User manual MCINTOSH MCC301M

[. . . ] MCC301M Power Amplifier MCC301M 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. [. . . ] Fully Discrete Design The MCC301M has a fully complimentary double balanced amplifier design and is identical to that found in McIntosh's leading home amplifiers. Balanced Inputs with Pass Through The Balanced Inputs cancel out interference noise that is produced by other sources in the vehicle and can be directly connected to the bridged speaker output of any head unit. The MCC301M provides two line level outputs, for the convenience of connecting multi-amplifier systems. Illuminated Power Meter The Illuminated Power Output Watt Meter on the MCC301M is peak responding and almost ten times faster than a professional VU meter. It also indicates the true power output of the amplifier regardless of the loudspeaker impedance, as both the voltage and current are measured. Remote Subwoofer Control and Line Output The subwoofer level can be controlled via an optional external rotary control, which can be remotely mounted in the vehicle. A line level 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 MCC301M consists of a power amplifier capable of 300 watts into 4 ohm speakers with less than 0. 005% distortion. High Current Output A peak output current of 50 amperes ensures that the MCC301M 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. 24dB per octave low pass filter with variable corner frequencies from 40Hz to 120Hz. Subsonic Filter The selectable frequency Subsonic Filter prevents the amplifier circuitry from amplifying non audible signals and thus wasting amplifier power. Power Guard and Sentry Monitor The Patented McIntosh Power Guard Circuit 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 circuit is present to ensure the MCC301M 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 MCC301M. There is additional information on the next page pertaining to installing the MCC301M into your vehicle. Top View of the MCC301M 13-21/32" 34. 69cm 11. 00" 2-11/16" 6. 82cm 27. 94cm 12-1/2" 31. 75cm 11-7/8" 30. 16cm Side View of the MCC301M 27. 93cm 11/32" 10. 93cm 11" 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 MCC301M and any associated mobile audio equipment. Amplifier Ventilation Always provide adequate ventilation for the MCC301M. 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 LED will light. [. . . ] When the SUBSONIC FILTER Switch is in the 20Hz Position, the Amplifier will pass all frequencies above 20Hz. In a similar fashion selecting the 28Hz position, the Amplifier will pass all frequencies above 28Hz. Refer to figure 5. Figure 5 Equalizer The MCC301M Power Amplifier is equipped with an equalizer. The one-band equalizer is best utilized as a notch filter to reduce a peak (as located by real-time analysis with an RTA) in your system's frequency response. [. . . ]