45kHz BW distortion study of 3 amplifier topologies (2xAB, 1xD) + A/B test

[pma]

You should also understand that the SAB amplifier has more flat frequency response than the NC252MP especially at high frequencies. The class D NC252MP has limited bandwidth and it has -0.5dB/20kHz. Both amps have their FR at amp output terminals quite independent on load impedance.

10kHz square response shows wide bandwidth and flat FR of the SAB amplifier. It is flat up to 100kHz.