Allpassphase Page

Engineers use allpass filters as "phase compensation." If a woofer's filter delays the signal by 90 degrees, an allpass filter can be inserted into the tweeter's path to delay it by a matching 90 degrees. The result? The drivers move in sync, and the stereo image remains stable.

He led her to a shelf in the back of the shop, where a single book lay nestled among old trinkets and forgotten heirlooms. The cover was worn, and the pages seemed to whisper to each other as Lily opened it. The words within were like nothing she had ever read before—they spoke of phases and cycles, of moments in time that were said to allow passage into other worlds. allpassphase