Yamaha YAS-103 Bluetooth Home Theater Soundbar. Powerful Sound with built in amplifiers that powers four drivers to deliver rich, full-range sound, with plenty of high-frequency detail and low-end thump. Each end of the bar is ported for enhanced bass response, so you get deep bass without the need for a separate subwoofer. Built-in Dolby and DTS. Includes built-in amplifiers: 30 watts x 2 for front L/R drivers, 60 watts for bass drivers. Two 2-1/2" full-range drivers, two 3" down-firing cone subwoofers and 2 bass ports enhance low-frequency response. Looks and sounds good! In good used condition.