The S2 speaker is a 2-way design that can be utilized as front or rear channel speakers in a surround system. The S2 features a 6-1/2" woofer and a larger enclosure than the S1, so it plays louder and has more bass output, filling larger rooms with clear, powerful sound. The S2 speaker can be integrated with either the P2, or P3 Active Subwoofers, to create a "powered tower" speaker. The SCT system makes it all possible, and you can choose between the P2 or the P3 subwoofers, depending on how large your room is. The S2/P2 combination is one of the most popular, and it also won the Reviewers Choice Award from Soundstage almost immediately after its world debut!