Thank you for choosing TUBE DRIVER. Tube Drivers musicality and absolute sonic transparency allow accurate reproduction of recorded music enabling you to hear as well as feel the music the way the artist intended. These handcrafted amplifiers feature full differential “front ends” based upon a true instrumentation amplifier topology. Tube Drivers utilize only the highest quality Svetlana tubes in our unique configurations. All of the internal amplifier stages have been designed to have ultra- wide bandwidth together with a high degree of linearity. The tubes used in these amplifiers provide both voltage gain and current gain where they are connected in Cascode and Cathode Follower configurations. D.C. servos are used to control any D.C. offset. These servos are critically positioned in the circuit so that not only is D.C. offset eliminated but also any subtle differences between tubes are internally compensated. These tube stages are then connected to a high current BiPolar output stage that uses the same audiophile quality Sanken output devices featured in the PrecisionPower 2500F1.The output stages receive their power from a highly regulated D.C. power supply which enhances their performance significantly. Very little negative feedback is used. Low feedback designs have greatly improved sound quality having an extremely warm and open sound with enhanced musicality consistent with only the highest quality home tube amplifiers.

S ervice

Do not attempt to service TUBE DRIVER products yourself. Performing exploratory surgery on your audio equipment yourself will void the warranty. Many parts of your TUBE DRIVER gear are custom built to our specifications. Our factory parts are not made available to anyone else nor are they for sale. Our goal is to make sure that your TUBE DRIVER product will always sound as good as the day it was purchased.Contact your authorized TUBE DRIVER dealer about obtaining any warranty service through TUBE DRIVER. (See Warranty inside back cover)

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C aution!

The extended use of a high powered audio system may result in hearing loss or damage. While TUBE DRIVER systems are capable of "Concert Level" volumes with incredible accuracy, they are also designed for you to enjoy at more reasonable levels all of the sonic subtleties created by musicians. Please observe all local sound ordinances.

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Directed Electronics MA4100 owner manual Ervice, Aution
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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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