Orchard Audio Delivers “Near Perfect” Fidelity with GaN

A typical Class-D audio amplifier operates at high switching frequencies. However, achieving an acceptable level of total harmonic distortion + noise (THD+N) is challenging due to the need for faster and cleaner switching transitions. Class-D amplifiers based on silicon MOSFETs have to incorporate large amounts of feedback circuitry to compensate for poor open-loop performance and the subsequent noise. While this noise can be reduced with larger devices, it increases the switching losses and reduces efficiency, increasing the system size and driving up material costs.

But all this has changed with GaN.

GaN transistors provide significant sound quality benefits over traditional silicon alternatives, including less harshness, cleaner highs, better transparency, and greater audio detail…