Acoustic devices; Apparatus for processing audio signals; Audio apparatus; Audio equipment; Audio installations; Crossover networks for audio apparatus; Digital audio signal processors; High fidelity audio apparatus; Cabinets for loudspeakers; Free standing loudspeakers incorporating boxes; Hi-fidelity loudspeakers; Horns for loudspeakers; Housing specifically adapted for loudspeakers; Loudspeaker apparatus; Loudspeaker boxes; Loudspeaker cabinets; Loudspeaker chassis; Loudspeaker enclosures; Loudspeaker housings; Loudspeaker installations; Loudspeaker systems; Loudspeaker units; Loudspeakers; Loudspeakers for mounting on walls; Loudspeakers for use in cinemas; Loudspeakers for use in theatres; Public address amplifying apparatus; Acoustic apparatus for reproducing sound; Apparatus for amplifying sound; Sound amplifying apparatus; Audio speakers; Audio speakers for home; Monitor speakers; Portable speakers; Public address speaker systems; Speakers (audio equipment); Personal stereos; Stereo amplifiers; Stereo hi-fidelity apparatus; Stereos