W a r n i n g !

To prevent a short to ground, disconnect the negative (-) terminal of the system’s battery before you begin. If the power cable shorts to ground, current will continue to flow until the short is opened, the main fuse blows, the battery explodes, or the wire melts.

Reconnect the terminal only after you make all connections .

G r o u n d i n g

Your MA4100 is designed to operate from a car’s positive 12 volt, negative ground electrical system. The ground wire should be the same gauge as the power wire indicated in the chart.

The main power cable should run from the amplifier location, through or under the vehicle, to the battery. You must use a grommet wherever the cable passes through a steel panel to prevent an eventual short to ground.

The ground connection is the most important part of any installation. If the connections are poor and/or the resistance is high, the resulting drops in voltage will rob you of amplifier power and may allow noise to enter your system. Your new MA4100 features a fully regulated power supply. It will make full power even if the voltage changes. It will draw more current at lower voltages to make that power. Lower voltage and high cable resistance means more total current draw. Using a digital multimeter (DMM), try to get cable resistance as low as possible. If resistance is too high, use a larger gauge wire. Try to ground your system to a single point in the vehicle. In larger systems, use distribution blocks and run both power and ground cables directly to the system battery.

R e m o t e T u r n - o n

IMPORTANT! Your new MA4100 is equipped with our unique tube warm-up circuit. When your system is turned on, The LED labeled “WARM UP” will illuminate and full power is applied to the tube heaters for approx. 35 seconds. The internal fan will then turn on and two seconds later the amp outputs will be switched on. The system will then play as normal.

You must connect a wire to the remote (REM) terminal (located in one of the speaker terminal plugs) of your amplifier to power on your MA4100. The source unit normally provides a remote amp turn-on or power antenna lead that provides this +12 volts when you turn on the unit.

•Run a wire from the chosen turn-on lead to the REM connection of your MA4100 (See Endpanel Layout: Page 10)

•Tighten the connection

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Directed Electronics MA4100 O u n d i n g, M o t e T u r n o n, Reconnect the terminal only after you make all connections
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MA4100 specifications

The Directed Electronics MA4100 is a cutting-edge car audio amplifier that brings dynamic power and superior sound quality to any vehicle's audio system. Engineered with precision, the MA4100 is designed to deliver enhanced audio performance while ensuring reliability and longevity.

One of the standout features of the MA4100 is its high power output. With a maximum power rating of 1000 watts, this amplifier provides impressive amplification for both high- and low-impedance speakers. Its four-channel configuration allows for versatile installation options, making it suitable for driving multiple speakers or subwoofers. The amplifier is capable of a bridged mode, allowing users to combine channels and boost output even further for a robust listening experience.

Equipped with advanced Class D technology, the MA4100 is both efficient and compact. This design minimizes heat production and ensures that the amplifier runs cool even under heavy load. Compared to traditional amplifiers, Class D amplifiers consume less power, making the MA4100 an energy-efficient choice for car audio enthusiasts. This efficiency also translates into smaller size, providing flexibility in installation without compromising on power delivery.

The Directed Electronics MA4100 features a built-in crossover and adjustable gain settings, allowing users to tailor the sound output to their preferences and vehicle acoustics. The variable high-pass and low-pass filters enable users to control which frequencies are amplified, optimizing the audio experience.

Furthermore, the MA4100 is designed with durability in mind. With a robust build quality, including a heat-sink design that facilitates efficient cooling, it is built to withstand the rigors of automotive environments. The amplifier is also equipped with protection circuitry to safeguard against overheating, short circuits, and overloading, ensuring long-term performance and reliability.

In terms of installation, the MA4100 includes high-level inputs that make it compatible with factory audio systems, allowing for easy integration without requiring extensive modifications. With its combination of power, efficiency, and sound quality, the Directed Electronics MA4100 is an excellent choice for audiophiles looking to upgrade their car's audio system. Whether for daily commuting or road trips, the MA4100 elevates the in-car listening experience to new heights.
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