Abstract: A speaker has a magnet assembly, a basket and a voice coil mounted in the flux gap of the magnet assembly. A spider mounts the voice coil to align it. A sound radiator, for producing sound, is connected by a connector to the voice coil. An isolator extends across the basket, between the sound radiator and the voice coil, to isolate the voice coil mechanically from the exterior, while permitting free movement of the connector. This then enables the voice coil to be connected to and driven by an amplifier connected to a relatively high voltage electrical supply.

Abstract: A loudspeaker and components for use in the construction thereof is provided. In one aspect, the present invention relates generally to a new type of loudspeaker comprising a driver having a sound radiating element, at least two motor elements which, in operation, cooperate to move the sound radiating element in response to an applied signal, and mounting elements coupled to the sound radiating element and motor elements, where the first motor element is mechanically coupled to the sound radiating element, and where the driver comprises at least two mechanical masses which, in operation, move independently in response to the applied signal. The mechanical masses are mechanically coupled such that in operation, the driver has at least fourth order frequency characteristics. This facilitates, for example, the construction of a fourth order loudspeaker system that performs like a vented enclosure system without employing a vent.

Abstract: The present invention relates to a method and power amplifier for providing an audio current comprising a first audio current and a second audio current to a split voice coil speaker having a first coil and a second coil located in a magnetic field. The first coil and the second coil are wired such that current can be provided to one coil without providing current to the other coil. The first audio current is provided to a first branch connected to the first coil. The second audio current is provided to a second branch connected to the second coil. The first audio current differs from the second audio current. The first audio current in the first coil and the second audio current in the second coil are oriented such that both the first audio current and the second audio current constructively contribute to a force provided to the voice coil.