SMSL Q5 Pro is a multi-function amplifier with a variety of inputs, including analog, optical, USB, and coaxial. It supports up to 24-bit audio and has a wide frequency response of 20Hz-20KHz. The Q5 Pro also features tone control, a subwoofer output, and seven EQ modes to customize your listening experience. With 40W x 2 output power and a dynamic range of 100 dB, the Q5 Pro delivers clear and powerful audio for your home entertainment system.