The S.M.S.L. SA-50 Amplifier is a powerful and reliable power amplifier that delivers high-quality sound. With one input and one output, this amplifier is ideal for home audio systems. The lot comes with two power supplies, making it easy to power the amplifier and keep your system running smoothly. The SMSL brand is known for producing high-quality audio equipment, and the SA-50 model is no exception. Its compact size and sleek design make it a great addition to any home audio system. This amplifier is easy to use and will enhance your listening experience. Power supplies included. Price is for two