Altec Lansing is back and bigger than ever- literally. Their THX certified MX5021 2.1 speaker system comes with two 10" tall satellites, a 15.7" tall subwoofer, control module, and a wireless remote. As compared to the 5100's reviewed in the past, the MX5021's are packing much more power with a total of 90 Watts ( 2x20W satellites + 1x50W woofer). The MX5021's differ form the 5100's in that is a dual satellite system designed to play music, so surround sound obviously won't be a possibility.