Class D Digital Power Amplifiers put out a higher power at a lower power consumption rate than analog amplifiers. They produce less heat and are lighter in weight. They can provide the amplification for many different public address systems. From small-sized shops and low-level buildings to large-sized offices and schools. The DPA-600S can provide clear and refined sound with over 100 dB of high S/N and below 0.5 % of low THD. They provide a high quality of BGM playback which is good for big box stores and shopping mall PA systems.