The Yamaha STAGEPAS400 is a bundle Pro audio set up that delivers exceptional high quality sound! This system includes 2 passive loudspeakers and a compact powered mixer, allocating 8 inputs for various uses. I purchased the S400 for house parties and small gatherings and it works perfect for my needs! You can easily liven up any indoor or outdoor get-together and play your favorite music! Additionally this PA set up has use with instruments and small bands; have a microphone, guitar, piano, wireless unit, or just your phone hooked up! Overall Very satisfied with this product and my purchase!