- Sep 2, 2019
- west coast, USA
basic problem with Class D is that due the switching nature of the topology, lots of high frequency energy is created, and must be filtered out (unless you want it to sound really bad.) The filter design depends not only on the amplifier's output stage, but the characteristics (resistance, and multiple frequency dependent reactive components) of the load (speaker drivers, crossover). that's why class D can work in 'self-powered' monitors (where the load characteristics are locked down and controlled, typically with an active crossover and separate amplifiers tailored to each driver), but not as well in full-range amplifier only configurations unless the filter is over-built (read large physical size and cost).