Class A is the gold standard and always used where cost is not a factor. Based purely on performance and sonics, the highest-fidelity amplifier design is class A. Speaker sensitivity, combined with your amplifier’s power output, determines the system dynamic range, an important consideration not to be overlooked though. No Compromise Nothing sounds better than

For hi-fi purposes, none. Class B is often used for radiofrequency broadcast amplifiers, where high power and low spurious RF emissions (sorry, no class-D in radio!) make it a great choice. On its own though, class B suffers from relatively high (crossover) distortion and is unsuitable for audio for that reason. Combined with a little

Class AB amplifiers offer many advantages that make them the most commonly found designs in the mainstream hi-fi space. For example, class AB amplifiers offer lower cost and cooler operation than class A designs, with some of the finesse and high fidelity, but with some of the punch and brute force power of class B