Yamaha AP-U70 CAVIT External Audio Soundboard with Integrated Amplifier (Discontinued by Manufacturer) For use with any USB-equipped computer, computer game, or audio source (such as CD, minidisc, or cassette player) 2 x 20 watts of amplification Virtual Dolby Digital and DTS (Digital Theater Systems) Virtual 5.1 reproduce multichannel sources with just 2 speakers 7-band graphic equalizer 2-year parts and labor warranty