Some of the best 5 Channel Amplifier brands are Alpine, Rockford Fosgate, Kenwood, and Pioneer. These brands manufacture car stereo equipment such as car amplifiers. The brand that produces the best 5 channels amplifiers is Alpine. They produce high-quality amplifiers that produce clean and clear sounds. Alpine 5 channel amplifiers are designed to work with a range of speaker sizes and configurations, so a buyer has a lot of choices when purchasing a new amplifier. There are different features available to choose from when purchasing a 5 channel amplifier from Alpine. Customers have the choice to purchase an amplifier with a built-in Crossover Network or one that does not.