Some amplifiers use car audio MOSFET transistors which are specialized in high power stereo amplification, particularly the MOSFET car amplifiers. It is clear that these devices would have developed features for Automotive stereo systems. First, the distortion of the input signal is fairly low do to greater impedance. Also, the ability of MOSFET car amplifiers to turn ON and OFF repetitively is highly advantageous in high frequency signal control. The enhancement of sound quality is characterized by sharper detail and greater cleanness and definition of the reproduced audio. Moreover, the enhancement of power efficiency due to the use of MOSFET technology results in far greater power delivered and lower energy consumed. There is a need in the market for car audio systems which require increased power with decreased energy use, hence, these amplifiers are in great demand.