Abstract: A sound system with a plurality of speakers is shown and described. The orientation of a second subset of the speakers is automatically adjustable relative to the orientation of a first subset of speakers. In certain examples, the system detects whether the audio signals it receives include up-firing content and adjusts the relative orientations when such content is provided. The sound system is also configured to calculate a desired degree of rotation for the speakers in the second subset based on the geometry of the room in which the sound system is located and the location of the listener in the room.

Abstract: A sound system with a plurality of speakers is shown and described. The orientation of a second subset of the speakers is automatically adjustable relative to the orientation of a first subset of speakers. In certain examples, the system detects whether the audio signals it receives include up-firing content and adjusts the relative orientations when such content is provided. The sound system is also configured to calculate a desired degree of rotation for the speakers in the second subset based on the geometry of the room in which the sound system is located and the location of the listener in the room.

Abstract: A speaker system can include a speaker core and a removable jacket. The speaker core can have a housing and a speaker positioned within the housing. The removable jacket can cover the speaker on an outside surface of the housing, the jacket extending along at least three sides of the housing. Among other features, the speaker core can be used with one of among a number of different jackets to form different speaker systems.

Abstract: A speaker system can include a speaker core and a removable jacket. The speaker core can have a housing and a speaker positioned within the housing. The removable jacket can cover the speaker on an outside surface of the housing, the jacket extending along at least three sides of the housing. Among other features, the speaker core can be used with one of among a number of different jackets to form different speaker systems.

Abstract: A speaker system can include a speaker core and a removable jacket. The speaker core can have a housing and a speaker positioned within the housing. The removable jacket can cover the speaker on an outside surface of the housing, the jacket extending along at least three sides of the housing. Among other features, the speaker core can be used with one of among a number of different jackets to form different speaker systems.

Abstract: A fluid check valve consisting of a pair of leaflets contained within an annular body member (10). These leaflets (16 and 17) open and close hemodynamically as a reaction to the natural pumping action of the heart. They open from the center outward based upon their S shape profile (45). Blood flows through the interior surface (12) of the annular body member and leaflets. These leaflets open and close relying upon, protruding rails from the annular body member (20 and 21) and their integrated stop means (31-38). The protruding rails guide the leaflets in a floating pivot action that virtually eliminates area of stasis and prevent thrombosis.