About the Operational Amplifier
We noticed the sound quality change caused by minute current changes in the internal circuitry and the influence of harmonic waves in a bandwidth of several MHz. We enhanced the signal processing purity by changing the standard structure of two circuits per chip to a single circuit per chip. This change isolated each amplifier circuit and thoroughly eliminated mutual interference, providing clear, crisp sound quality in the audible bandwidth. Our design is based on the MUSE05 op amp, used for the first time in a n automotive application.