The S-Series delivers powerful, room-filling sound despite its surprisingly compact size. The series offers three options: the S-15 speaker for on-wall mounting, the S-15IW in-wall speaker, and the S-16IW in-wall and in-ceiling speaker. The system is complemented by two compact S-210 Boundary Woofers. An essential feature of the S-15 speaker is the dipole tweeter capable of dispersing the treble in such a way that an ambient sound is produced throughout the entire listening space.