Abstract: An adjustable mounting assembly includes (i) a housing with front and rear collars joined by a threaded engagement, the rear collar including teeth oriented toward the front collar, (ii) a front body part extending outwardly through an opening in the front collar, (iii) an intermediate body part coupled to the front body part, and (iv) a rear body part coupled to the intermediate body part, the rear body part including teeth oriented toward the rear collar, the mounting assembly adjustable such that (a) when the threaded engagement is tightened, the teeth of the rear body part are positioned in an interlocking engagement with the teeth of the rear collar, preventing rotation about a pitch axis of the mounting assembly, and (b) when the threaded engagement is loosened, the teeth of the rear body part are disengageable from the teeth of the rear collar, allowing rotation about the pitch axis.

Abstract: Substrates for playback devices and playback devices incorporating same. In one example, a playback device includes an audio transducer, a grille laterally overlaying the audio transducer, wherein the grille has a first thickness and includes a first perforated region having a first plurality of apertures extending through the grille, and a substrate disposed between the audio transducer and the grille, wherein the substrate has a second thickness greater than the first thickness, and wherein the substrate includes a second perforated region having a second plurality of apertures extending through the substrate, the second perforated region defining an acoustic filter configured to modify a radiation pattern of an acoustic output from the audio transducer.

Abstract: A method for mounting a flexible speaker grill on to an audio speaker housing, the method comprising: punching a plurality of holes through a thin, flat, piece of plastic to create a grill surface; affixing a scrim cloth to the rear surface of the grill surface; affixing two frame members to the grill surface, each said frame member to an opposite end of the grill surface to create a grill assembly; wrapping the grill assembly around an audio speaker housing with the scrim cloth toward the inside such that the grill assembly conforms to the adjacent surface of the speaker housing; mounting the two frame members to the speaker housing by screws into threaded holes in the speaker housing.

Abstract: An adjustable mounting assembly includes (i) a housing with front and rear collars joined by a threaded engagement, the rear collar including teeth oriented toward the front collar, (ii) a front body part extending outwardly through an opening in the front collar, (iii) an intermediate body part coupled to the front body part, and (iv) a rear body part coupled to the intermediate body part, the rear body part including teeth oriented toward the rear collar, the mounting assembly adjustable such that (a) when the threaded engagement is tightened, the teeth of the rear body part are positioned in an interlocking engagement with the teeth of the rear collar, preventing rotation about a pitch axis of the mounting assembly, and (b) when the threaded engagement is loosened, the teeth of the rear body part are disengageable from the teeth of the rear collar, allowing rotation about the pitch axis.