Showcasing multi-channels, this amplifier is originally designed to amp up a 4-speaker system, such as a couple of pairs of full-range speakers. When it comes to power, a 4-channel amplifier beats the amp inside a dash-mounted receiver any day. A 4-channel amplifier is the centerpiece that gives life to speakers, subwoofers, or even both for a surround sound experience that's always meant to be a memorable ride. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.Īt the heart of the best-sounding audio system you've ever heard in a vehicle is a powerful amplifier that surely packs a punch. Other Classes: You may see classes such as GH, bD, X, FD, etc.
These amps are most commonly used to drive subwoofers. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive speakers.Ĭlass D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. Class A/B has great sound quality but is not as efficient as class D. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.Ĭlass A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude.
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