AudioControl ACM-4.300 4-Channel Class D Micro Amplifier

Introduction

Thank you for choosing the AudioControl ACM-4.300 4-Channel Class D Micro Amplifier. This amplifier is designed to deliver high-quality audio performance in a compact form factor, suitable for various car audio system configurations. This manual provides essential information for proper installation, operation, and maintenance to ensure optimal performance and longevity of your amplifier.

Safety Information

Please read all instructions carefully before installation and use. Failure to follow these guidelines may result in injury or damage to the amplifier or vehicle.

• Always disconnect the vehicle's battery negative terminal before beginning any electrical work.
• Ensure proper grounding for the amplifier to prevent electrical hazards and noise.
• Use appropriate wire gauges for power, ground, and speaker connections as specified in the installation section.
• Mount the amplifier securely in a location that is dry, well-ventilated, and protected from excessive heat, moisture, and vibration.
• Avoid installing the amplifier in areas that could obstruct vehicle operation or safety features.
• Do not attempt to open or modify the amplifier. Refer all servicing to qualified personnel.

Product Overview

Features

• Power Output: 4 x 75W at 2 Ohms, 4 x 50W at 4 Ohms
• Bridged Power: 150W at 4 Ohms
• Signal Sensing: GTO™ Signal Sense for automatic turn-on
• Integration: Active Speaker-Level Inputs for seamless integration with OEM systems
• Inputs: RCA Line Inputs for aftermarket head units
• Crossover: Linkwitz-Riley Crossover for precise audio tuning
• Design: Reversible Cover Plate for flexible mounting options

Component Identification

Familiarize yourself with the various inputs, outputs, and controls on your ACM-4.300 amplifier.

Figure 1: Top view of the ACM-4.300 amplifier, highlighting the power, ground, remote, speaker level inputs, RCA inputs, and speaker outputs.

Figure 2: Side view of the ACM-4.300 amplifier, detailing the various input and output terminals for connection.

Setup and Installation

Mounting the Amplifier

Due to its compact design, the ACM-4.300 can be mounted in various locations. Choose a secure, dry, and well-ventilated spot away from direct sunlight or heat sources. Ensure adequate space for wiring and airflow around the amplifier.

• Use the provided mounting hardware to secure the amplifier to a solid surface.
• Consider the reversible cover plate design for flexible installation orientations.

Wiring Connections

Proper wiring is crucial for performance and safety. Refer to the diagrams below and use appropriate wire gauges.

Power and Ground Connections

• +12V (Power): Connect directly to the positive terminal of the vehicle's battery using a fuse holder within 18 inches of the battery.
• GND (Ground): Connect to a clean, bare metal chassis point in the vehicle. Ensure a solid, low-resistance connection.
• REM (Remote Turn-On): Connect to the remote output of your head unit. If using speaker-level inputs with GTO™ Signal Sense, this connection may not be required.

Input Connections

• Speaker Level Inputs: For integration with factory OEM systems, connect the speaker wires from your head unit or factory amplifier directly to the speaker level input terminals.
• RCA Line Inputs: For aftermarket head units with RCA pre-outs, connect RCA cables from the head unit to the amplifier's RCA input jacks.

Speaker Output Connections

• Connect your speakers to the corresponding speaker output terminals. Ensure correct polarity (+ to + and - to -).
• The amplifier supports 2-Ohm stereo operation and 4-Ohm bridged operation. Refer to the specifications for power ratings.

Operating Instructions

Gain Adjustment

The gain controls on the amplifier match the output voltage of your head unit to the amplifier's input sensitivity. Adjust the gain carefully to prevent distortion.

• Start with the gain controls set to minimum.
• Turn your head unit volume up to about 75% of its maximum.
• Slowly increase the amplifier's gain control until you hear slight distortion, then back it off slightly.

Crossover Settings

The Linkwitz-Riley Crossover allows you to filter frequencies sent to your speakers, optimizing sound quality and protecting speakers.

• High-Pass Filter (HPF): Allows frequencies above the set point to pass through. Useful for protecting smaller speakers from low bass.
• Low-Pass Filter (LPF): Allows frequencies below the set point to pass through. Typically used for subwoofers.
• Adjust the crossover frequency according to your speaker's specifications and desired sound.

GTO™ Signal Sense

The GTO™ (Great Turn On) Signal Sense feature automatically detects an audio signal on the speaker-level inputs and turns the amplifier on. When the audio signal is removed, the amplifier will turn off after a short delay. This eliminates the need for a separate remote turn-on wire when using speaker-level inputs.

Maintenance

The AudioControl ACM-4.300 amplifier requires minimal maintenance. Follow these guidelines to ensure continued performance:

• Keep the amplifier clean and free of dust and debris. Use a soft, dry cloth for cleaning.
• Ensure that the amplifier's ventilation openings are not blocked to prevent overheating.
• Periodically check all wiring connections for tightness and corrosion.
• Do not use harsh chemicals or abrasive cleaners on the amplifier's surface.

Troubleshooting

If you experience issues with your amplifier, consult the following troubleshooting guide before contacting support.

Specifications

Warranty Information

The AudioControl ACM-4.300 amplifier comes with a 5-Year Bulletproof Warranty. For specific terms and conditions, please refer to the warranty card included with your product or visit the official AudioControl website.

Note: The product specifications also mention a "1 Year" warranty. For the most accurate and up-to-date warranty information, please consult the official documentation provided with your purchase or the manufacturer's website.

Support

For technical assistance, troubleshooting beyond this manual, or warranty claims, please contact AudioControl customer support. You can find contact information on the official AudioControl website or through your authorized dealer.

AudioControl Official Website: www.audiocontrol.com