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. Failure of a fuse is usually an indication of a problem. Replacing the fuse, if there is problem in the amplifier, may incur a risk of further damage. Refer to figures 9, 10 and 11.

Caution: Disconnect the Amplifier from the Vehicle Battery (or DC Power Supply) as Potentially Dangerous Currents exist inside the amplifier.

1.	Before accessing fuses, disconnect both the positive
	and negative power cables from the DC input
	terminals on the left side of the amplifier using a 5/
	32” hex key.
2.	Remove the Top Glass Panel by first removing the
	four hex bolts with the supplied 3/32” hex key.
3. To remove the Top Glass Panel, 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.
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 crossover, equalizer and sensitivity
	knobs.
7.	Remove the Gold Faceplate Control Panel.
8.	Remove the fuses with needle nose pliers, taking care
	to avoid hitting parts on the ciruit board.
	Note: To determine if the fuse has failed, examine the
	link between the two fuse legs to see if it has a
	break in it.
9.	Replace the fuse with one of the same type and

rating, as unauthorized substitutions may prove hazardous to you and the amplifier.

10.When reinserting the fuse, set it in place with the pliers, then push it the rest of the way in with your finger to avoid having the pliers slip and hit the circuit board.

11.Re-install the Gold Faceplate Control Panel and all 5 crossover, equalizer and sensitivity knobs.

12.Re-connect the power cables to the vehicle battery. If the replacement fuse(s) fails again, have the amplifier repaired at a McIntosh Service Center.

MCC302M specifications

The McIntosh MCC302M is an impressive power amplifier designed to deliver an exceptional audio experience for audiophiles and music enthusiasts. Renowned for its robust performance and high-quality sound, the MCC302M embodies the craftsmanship and engineering excellence that McIntosh is known for.

One of the standout features of the MCC302M is its ability to deliver a powerful 300 watts per channel into 2, 4, or 8-ohm speakers. This flexibility ensures compatibility with virtually any speaker setup, allowing users to enjoy the full spectrum of music dynamics. The innovative Autoformer technology employed in the amplifier ensures that the full power is delivered to speakers regardless of their impedance, making it an ideal choice for various audio configurations.

The architecture of the MCC302M incorporates a rugged design, featuring McIntosh's signature glass front panel and iconic blue watt meters. These meters provide a visual representation of the power output, enhancing both functionality and aesthetics. The chassis is constructed from high-quality materials, ensuring durability while minimizing interference that could affect sound quality.

Another significant technology in the MCC302M is its Power Guard system. This feature helps protect speakers by preventing distortion during high-volume playback, ensuring that users can enjoy their favorite music without worry. The amplifier also includes a special Sentry Monitor circuit, which safeguards against short circuits and overheating, automatically disconnecting the output until safe operational conditions resume.

For connectivity, the MCC302M is equipped with balanced and unbalanced inputs, offering versatility for various source components. The amplifier's 12V trigger and remote power control capabilities allow for seamless integration into multi-component audio setups, enhancing user convenience.

In terms of sound quality, the MCC302M delivers a warm and dynamic audio experience, providing clarity across all frequencies. Whether listening to classical music or modern rock, the amplifier faithfully reproduces the character of the original recording.

In summary, the McIntosh MCC302M power amplifier stands out as a paragon of power and performance, combining advanced technologies with exquisite design. Its robust power output, flexible compatibility, and built-in protection features make it an ideal choice for serious audiophiles seeking to elevate their listening experience. With McIntosh's legacy of superior audio engineering, the MCC302M continues to set the standard for high-performance amplification.