Designed for On-wall or flushed in (2pi) applications. Perhaps our most versatile speaker Can be used as surround, height or LCR. When used as a surround channel the S4s has uncommonly high sensitivity, power handling and low distortion making this the ideal choice for high end theaters. Featuring our proprietary DPC-Array controlling Mid/High frequencies, centered by our finest 28mm Beryllium dome and dual 28mm TPCD ultra-lightweight domes. This new tweeter/waveguide DPC-Array delivers amazing accuracy, smoothness, and directivity control to handle the critical vocal range and delicate treble. The S4s shares the same DPC-Array and benefits from our unique timbre matching technique as found in the entire S-Series range of speakers.