The XCS series adopts ClassD working mode, four channel, 1U design, and is composed of highly stable switching power supply and high-efficiency Class D amplifier, which creates advantages such as high efficiency, low heat, and small size. It has multi-level sensitivity selection and perfect protection circuit design, making it the best choice for fixed installation of sound reinforcement venues. Each of our power amplifiers undergoes strict and complete testing before leaving the factory, including surface mount AOI testing, ICT testing, single board intelligent function testing, whole machine AP testing, fully automatic vibration tester, voltage withstand testing, grounding testing, product temperature rise testing, product aging testing, super high power frequency converter 100V-264V cycle testing, and pre packaging AP audio analyzer for full performance testing of the product.