Abstract: A loudspeaker enclosure is disclosed. The loudspeaker enclosure comprises a base panel, a first side panel configured to attach to the base panel, a second side panel configured to attach to the base panel, a top panel configured to attach to the first side panel and the second side panel, a front panel configured to attach to the base panel, the first side panel, the second side panel, and the top panel, the front panel defining at least one loudspeaker opening configured to receive a loudspeaker, and a rear panel configured to attach to the base panel, the first side panel, the second side panel, and the top panel.

Abstract: The disclosed device is directed towards an active audio speaker system having at least one audio speaker and an amplifier electrically coupled thereto. The active audio speaker system includes a cabinet having an enclosure defining an interior of the cabinet and an exterior of the cabinet. The interior contains the amplifier. A cooling unit is contiguous with the enclosure of the cabinet. The cooling unit includes a conduction module thermally coupled to the amplifier and a forced convection module at the exterior. The forced convection module is configured to transfer thermal energy from the conduction module.

Abstract: A loudspeaker enclosure is disclosed. The loudspeaker enclosure comprises a base panel, a first side panel configured to attach to the base panel, a second side panel configured to attach to the base panel, a top panel configured to attach to the first side panel and the second side panel, a front panel configured to attach to the base panel, the first side panel, the second side panel, and the top panel, the front panel defining at least one loudspeaker opening configured to receive a loudspeaker, and a rear panel configured to attach to the base panel, the first side panel, the second side panel, and the top panel.

Abstract: The disclosure describes a phase-splitter/level shifter comprising a first MOS transistor has a drain coupled to the first output node and a source coupled to a feedback node through a source resistor and a gate. A second MOS transistor has a drain coupled to a second output node and a source coupled to the feedback node through a source resistor and a gate. A first operational amplifier has a non-inverting input coupled to a single-ended input node, and an inverting input coupled to a second reference current source, an output coupled to the gate of the first MOS transistor. A second operational amplifier has a non-inverting input coupled to a single-ended input node, an inverting input coupled to a first reference current source, and an output coupled to the gate of the second MOS transistor. A variable resistor is coupled between the source of the first and second MOS transistor.

Abstract: A wide bandwidth, multi-FET current sharing output stage, MOS audio power amplifier employs multiple feedback loops. An audio input is supplied to a voltage feedback amplifier stage driving a push-pull voltage gain/phase splitter stage. A bias adjustment stage driven from the push-pull voltage gain/phase splitter stage drives a current drive stage. The current drive stage drives an output stage comprising a plurality of paralleled current shared individual MOS output transistors driving an output nodeconnected to a load. Up to three feedback loops are employed. A first voltage feedback loop comprises a voltage feedback stage having an input connected to a voltage divider driven from the first terminal of the load and an output connected to a feedback input node in the voltage feedback amplifier stage.

Abstract: A wide bandwidth, multi-FET current sharing output stage, MOS audio power amplifier employs multiple feedback loops. An audio input is supplied to a voltage feedback amplifier stage driving a push-pull voltage gain/phase splitter stage. A bias adjustment stage driven from the push-pull voltage gain/phase splitter stage drives a current drive stage. The current drive stage drives an output stage comprising a plurality of paralleled current shared individual MOS output transistors driving an output nodeconnected to a load. Up to three feedback loops are employed. A first voltage feedback loop comprises a voltage feedback stage having an input connected to a voltage divider driven from the first terminal of the load and an output connected to a feedback input node in the voltage feedback amplifier stage.

Abstract: A wide bandwidth, multi-FET current sharing output stage, MOS audio power amplifier employs multiple feedback loops. An audio input is supplied to a voltage feedback amplifier stage driving a push-pull voltage gain/phase splitter stage. A bias adjustment stage driven from the push-pull voltage gain/phase splitter stage drives a current drive stage. The current drive stage drives an output stage comprising a plurality of paralleled current shared individual MOS output transistors driving an output node connected to a load. Up to three feedback loops are employed. A first voltage feedback loop comprises a voltage feedback stage having an input connected to a voltage divider driven from the first terminal of the load and an output connected to a feedback input node in the voltage feedback amplifier stage.

Abstract: A wide bandwidth, multi-FET current sharing output stage, MOS audio power amplifier employs multiple feedback loops. An audio input is supplied to a voltage feedback amplifier stage driving a push-pull voltage gain/phase splitter stage. A bias adjustment stage driven from the push-pull voltage gain/phase splitter stage drives a current drive stage. The current drive stage drives an output stage comprising a plurality of paralleled current shared individual MOS output transistors driving an output node connected to a load. Up to three feedback loops are employed. A first voltage feedback loop comprises a voltage feedback stage having an input connected to a voltage divider driven from the first terminal of the load and an output connected to a feedback input node in the voltage feedback amplifier stage.

Abstract: The speaker system includes a speaker having first and second terminals. An audio amplifier is included having an output terminal connected to the first speaker terminal. A control loop is included which adjusts the level of a signal applied to the speaker in response to changes in the impedance thereof. The control loop includes a current sensing component connected between the second terminal of the speaker and ground. A differential input operational amplifier having first and second differential input terminals and an output terminal is included, the output terminal of which is connected to an input terminal of the amplifier. A first feedback path is provided, which includes a first resistor connected between the output terminal of the operational amplifier and the first input terminal thereof. A second feedback path is provided between the second terminal of the speaker and the second terminal of the operational amplifier.