Not bad. The filter capacitor value of the Music Journey ec4.5 is increased to 80000μF and is equipped with a powerful 500VA transformer. Since the Music Journey ec4.5 is equipped with an overload monitoring system, it does not need to use a relay anymore. Lian/Sheng Audio maintenance tips: The speaker output can be directly connected to the speaker. There will be no delay control components in the signal channel, making the signal transmission smoother and more complete.