I n p u t G a i n C o n t r o l s

There are two Input Gain Controls located on the end panel under the RCA input jacks. These are not volume controls! These controls match the output signal voltage of the source unit to the amplifier inputs.

By turning the controls clockwise (to the right), the inputs of the amplifier become more sensitive and will allow a weak signal of approximately 1/2 volt to drive the amplifier to full power. At the same time, while an amplifier with its level controls at maximum is able to drive a weak signal, it also picks up and amplifies any noises lurking in the background, such as a brake light pop, alternator whine, or ignition tick.

Increasing the signal voltage to the amplifier by using a high output source unit, or a TUBE DRIVER LD-3, will increase the signal to noise ratio . By turning the level controls counterclockwise (to the left), the amp inputs will be less sensitive. The amp will reproduce music at full power while making any noise floor insignificant. Your MA4100 accepts signal levels of up to 12 volts RMS.

S e t t i n g I n p u t G a i n

1.Set the Input Gain Controls to just above the lowest setting.

2.Turn the master volume on the source unit or pre-amp to almost full volume.

3.With music playing, slowly increase each Input Gain Control until you hear distortion. Turn down each Gain Control until the distortion stops.

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Directed Electronics MA4100 owner manual P u t G a i n C o n t r o l s, T t i n g I n p u t G a i n
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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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