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manual abstract
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. • 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. It is a very important feature in the automotive environment. Speaker wires to 10 AWG and DC input wires to 4 AWG can be accommodated. 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" _ 27.94cm Side View of the MCC301M S ÏÏMntosh 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. The warm air exits the amplifier through vents on the heatsinks. See figure 1. 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. The fans are normally off. 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. 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. The openings in the fan housings and heat tunnel vents can allow internal components to be damaged by exposure to water, chemicals or any form of road dust or debris. Removing the Glass Panel To access the MCC301M Controls, remove the glass panel by removing the four hex bolts with the supplied 3/32” hex key. See figure 2. Attach the supplied suction cup to the top center of the glass panel and carefully raise it high enough to put your hand under. Temporarily place the removed glass panel in a safe place, remove the suction cup and save it for future use. Removing the End Caps To access the MCC301M Connecting Terminal Block, remove the Glass Panel first (the above step) and then remove the Phillips Screws holding the End Caps on both sides of the amplifier and lift the end caps off. See figure 3. Warm Air Cool Air Figure 1 Cool Air ItNitlosh UCtlUiH HllhViH ,'iHKLIMbH Warm Air Remove Top Cover Screws Figure 2 \ / Remove Top Cover Screws Remove End Cap Screws Figure 3 \ / Remove End Cap Screws 6 Side Panel Cooling and Connections Connect to the Negative (-) vehicle battery terminal Connect to the positve (+) vehicle battery terminal with an inline fuse Cooling Fan...