A:Answer The BDVE3100 includes 2 front speakers, 2 Surround speakers, 1 Center speaker and 1 subwoofer. When using the BD/DVD function of the system (meaning when playing BD or DVD discs), it is able to support 5.1 surround, if the disc being played has that audio format. A list of supported audio formats can be found on page 63 of the Operating Instructions Manual (link provided below).
http://www.docs.sony.com/release/BDVE6100_E4100_E3100_E2100.pdf