Topping PA5 offers a combination of state-of-the-art technology. These amplifiers feature a fully balanced structure and use an innovative Class D amplifier to achieve outstanding sound quality with minimal distortion. With THD+Na levels of just 0.0004% and 0.0003% at 5W output into 4Ω and 8Ω loads respectively, they rival high-end DACs in distortion performance. The PA5 II Plus delivers an impressive 140W x 2 output into 4 ohm loads at 10% distortion, while the PA5 II delivers 100W x 2 output into 4 ohm loads at 1% distortion. In addition, comprehensive circuit protection ensures against over-voltage, under-voltage, short-circuit, over-current and overheating, ensuring reliable operation.