Abstract: In one example embodiment, a device mounting system is provided for in-wall and/or in-ceiling use in residential and commercial structures, suitable for both retro-fit and new construction applications. The system includes a mounting ring and a device can. The mounting ring is installed directly into a hole cut at a selected location in the wall or ceiling or into a pre-construction bracket arranged in the wall or ceiling. The device can is later inserted into the mounting ring and retained therein by a combination of a number of magnets that are attracted to a mounting ring flange and a number of spring clips that engage an inner face of a mounting ring body.

Abstract: In various example embodiments, a battery-assisted PoE powered device is provided that includes a local battery pack for providing a burst of power to a device load in excess of the continuous power available via PoE. A charger/path controller charges the local battery pack during periods of time when the device load consumes less power than available via PoE (e.g., consumes less than the 71 W of guaranteed continuous power under IEEE 802.3bt). During periods of time when the device load demands more power than available via PoE (e.g., when peak power is demanded by an audio speaker, when inrush occurs in a motor, or for various types of intermittent devices when they are activated) the charger/path controller discharges the battery pack, to drive the device load with a combination of PoE and battery power.

Abstract: In various example embodiments, a battery-assisted PoE powered device is provided that includes a local battery pack for providing a burst of power to a device load in excess of the continuous power available via PoE. A charger/path controller charges the local battery pack during periods of time when the device load consumes less power than available via PoE (e.g., consumes less than the 71W of guaranteed continuous power under IEEE 802.3bt). During periods of time when the device load demands more power than available via PoE (e.g., when peak power is demanded by an audio speaker, when inrush occurs in a motor, or for various types of intermittent devices when they are activated) the charger/path controller discharges the battery pack, to drive the device load with a combination of PoE and battery power.

Abstract: In one example embodiment, a device mounting system is provided for in-wall and/or in-ceiling use in residential and commercial structures, suitable for both retro-fit and new construction applications. The system includes a mounting ring and a device can. The mounting ring is installed directly into a hole cut at a selected location in the wall or ceiling or into a pre-construction bracket arranged in the wall or ceiling. The device can is later inserted into the mounting ring and retained therein by a combination of a number of magnets that are attracted to a mounting ring flange and a number of spring clips that engage an inner face of a mounting ring body.

Abstract: A pair of matched monaural speakers are added inside conventional left and right stereo speaker housings so that the left, right and flat panel monitor appear joined in a seamless aesthetic effect. The added speakers are provided with center channel monaural sound, making it appear as though such sound emanates from the center of the monitor, thereby enhancing home theater impact to provide stereo and center channel sound from each left and right speaker housing.

Abstract: A pair of matched monaural speakers are added inside conventional left and right stereo speaker housings so that the left, right and flat panel monitor appear joined in a seamless aesthetic effect. The added speakers are provided with center channel monaural sound, making it appear as though such sound emanates from the center of the monitor, thereby enhancing home theater impact to provide stereo and center channel sound from each left and right speaker housing.

Abstract: An amplifier housing assembly particularly useful for automobile stereo systems is disclosed. The assembly comprises a mounting plate which bolts to a stationary surface and an amplifier enclosure which mounts on the mounting plate. Wires from speakers and a power source are connected to the mounting plate which are then connected to the amplifier when the amplifier housing is mounted on the mounting plate by means of male and female connectors. An antitheft feature of the housing is that the mounting bolts of the mounting plate are rendered inaccessible when amplifier enclosure is mounted on the mounting plate.

Abstract: A diaphragm for an acoustical transducer comprises a support and a separate cover for the support. The support is constructed from a relatively more rigid material having the desired physical characteristics of mass and stiffness for the transducer. The cover comprises a light weight, relatively less rigid, and pliable sheet of material. The cover is attached to the support, illustratively by an adhesive, to form the diaphragm.