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6

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 clear-
ance 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 pas-
sages demanding high power, the fans will turn-on to in-
crease cooling. If cooling is still not sufficient, additional
heating will shut down the amplifier’s internal power sup-
ply 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 ex-
posed 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, re-
move the Glass Panel first (the above step) and then re-
move the Phillips Screws holding the End Caps on both
sides of the amplifier and lift the end caps off. See figure 3.

Remove Top Cover Screws

Remove Top Cover Screws

Figure 2

Remove End Cap Screws

Remove End Cap Screws

Figure 3

Cool Air

Warm Air

Warm Air

Figure 1

Cool Air

Summary of Contents for MCC301M

Page 1: ...MCC301M Owner s Manual McIntosh Laboratory Inc 2 Chambers Street Binghamton New York 13903 2699 Phone 607 723 3512 FAX 607 724 0549 MCC301M Power Amplifier ...

Page 2: ...by items placed upon or against them paying particular attention to the point where they enter the instrument Care of Equipment 14 Clean only with dry cloth 15 Do not permit objects or liquids of any kind to be pushed spilled and or fall into the equipment through enclosure openings Repair of Equipment 16 Refer all servicing to qualified service personnel Ser vicing is required when the equipment ...

Page 3: ...n Serial Number Purchase Date Dealer Name If it is determined that your McIntosh product is in need of repair you can return it to your dealer You can also return it to the McIntosh Laboratory Service Repair department For assistance on factory repair return procedure contact the McIntosh Repair Department at McIntosh Laboratory Inc 2 Chambers Street Binghamton New York 13903 Phone 607 723 3515 Fa...

Page 4: ...fier power supplies to prevent damage to your valu able loudspeakers Thermal Protection with Multi Speed Cooling Fans Built in thermal protection circuits guard against overheat ing which could shorten the normal long life expectancy of your McIntosh Power Amplifier Cooling fan speed is con trolled by temperature sensors attached to the interior of the extruded aluminum cooling tunnel The fans are...

Page 5: ...nsions can assist in determining the best location for your MCC301M There is additional in formation on the next page pertaining to installing the MCC301M into your vehicle Dimensions Top View of the MCC301M Side View of the MCC301M ...

Page 6: ...ically 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 ex posed to the elements The openings in the fan housings and h...

Page 7: ...tain McIntosh Control Centers Cooling Fan Air Intake OUTPUT Connections for loudspeakers SUBWOOFER OUTPUTS supply a summed output Receives the Amplifier Turn ON signal from a McIntosh Control Center Connect to the Negative vehicle battery terminal Connector for optional SUBwoofer REMOTE Volume CONTROL OUTPUTs from the INPUT Signal Source for connection to an other Power Amplifier Cooling Fan Air I...

Page 8: ...ect polarities Note The A and B OUTPUT Terminals are in parallel either A B or both Terminals may be connected Left Front Right Front Vehicle Battery Fuse McIntosh Control Center Amp ON McIntosh External Subwoofer Rotary Control 3 Connect audio cables from the Control Center Outputs to the McIntosh Power Amplifier Upper Range Inputs 1 and 2 4 Connect audio cables from the McIntosh Power Ampli fier...

Page 9: ...wer cables to the battery Left Front Vehicle Battery Fuse McIntosh Control Center Power Guard Amp ON 2 Connect a wire from a McIntosh Control Center with Power Guard to the MCC301M PG Connector on the right side of the amplifier 3 Connect a cable up to 12AWG from the loudspeaker system connected to the Amplifier s A OUTPUT Ter minals being careful to observe the correct polarities 4 Connect an aud...

Page 10: ...Input Sensitivity Control SOURCE Switch selects either Input 1 or 1 2 SUBwoofer Sum of Inputs 1and 2 EQUALIZER Controls select the FREQUENCY and the LEVEL of Boost or Cut at the Center Fre quencies LOW PASS FILTER Switch activates the filter SUBSONIC FILTER Switch selects the low frequency roll off be low 20Hz or 28Hz or flat frequency re sponse METER indicates the actual Power Output ...

Page 11: ... the Amplifier will pass all frequencies above 28Hz Refer to figure 5 Equalizer The MCC301M Power Amplifier is equipped with an equalizer The equalizer is not intended to act as a tone control 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 If you are attempting to equalize a system without ...

Page 12: ... hand under Temporarily place the removed glass panel in a safe place remove the suction cup and save it for future use 4 Remove the Phillips Screws holding the End Caps on both sides of the amplifier and lift the end caps off 5 Remove the two Phillips Screws one is located above the row of Controls Switches and the other near the Bottom Edge of the Gold Faceplate Control Panel 6 Remove all 5 cros...

Page 13: ...13 Block Diagram MCC301M Block Diagram ...

Page 14: ...ed at 2 Subsonic Filter Selectable 20Hz or 28Hz the slope is 18dB per octave Low Pass Filter Adjustable from 40Hz to 120Hz with a slope of 24dB per octave Subwoofer Output Low Pass filtered at 200Hz with a 6dB per octave slope level variable 12dB when using optional McIntosh Ex ternal Subwoofer Rotary Control Intermodulation Distortion Maximum Intermodulation Distortion if instanta neous peak outp...

Page 15: ...below failure to do so will result in shipping damage Make sure that the Top Glass Panel is firmly secured to the chassis using the supplied hex head screws Use the original shipping carton and interior parts only if they are all in good serviceable condition If a shipping carton or any of the interior part s are needed please call or write Customer Service Department of McIntosh Labo ratory Pleas...

Page 16: ...Intosh Laboratory Inc 2 Chambers Street Binghamton NY 13903 The continuous improvement of its products is the policy of McIntosh Laboratory Incorporated who reserve the right to improve design without notice Printed in the U S A ...

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