In today's rock and pop music arena, greater demands are placed on the loudspeaker than ever before. Higher sound pressure level requirements, higher amplifier capabilities, and wider dynamic range musical inputs are putting a considerable strain on current art to deliver. Necessary are high power capacity, large linear excursion, and low long-term and transient power compression. The heart of this achievement is good motor design (that is, magnetic structure and voice-coil configuration). A loudspeaker motor structure is described that provides a mechanism for keeping the voice-coil cooler at all input levels than previous designs, resulting in lower long-term power compression and a greater ability to handle power. Also outlined is a choice of magnetic gap configuration and voice-coil architecture which provide high linear excursion and low transient power compression without sacrificing efficiency.
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