Patent Review: Smart Bass Reflex Loudspeaker

James Croft (Croft Acoustical) reviews a very curious patent from Amazon Technologies, Inc. (Reno, NV), filed in 2013, and awarded in April 2017. Basically, the patent discusses a new technique to tune a port of a loudspeaker, in this case multiple ports that will be open or selectively closed, in function of an analysis of the frequencies of the signal being played. This article was originally published in Voice Coil, June 2018.

Polk Audio announced the launch of the Reserve Series, a high-performance, versatile loudspeaker line designed for music, movies and gaming. The Reserve Series combines Polk’s flagship components and advancements in cabinet design to deliver an superior listening experience at an extraordinary value. IMAX Enhanced, Hi-Res Audio Certified, and compatible with both Dolby Atmos and DTS:X, the Reserve Series includes nine models available in matte black, matte white and walnut woodgrain finish.

On this Voice Coil Spotlight article, Elario Dalmas II (Quest Engines) details how his company's Stratified Stream Ports can improve vented box systems. Quest Engines has developed an innovative patent-pending speaker port technology that allows for new visual and sonic aesthetics in the design of vented box speaker systems, using see-through ports. This article was originally published in Voice Coil, March 2019.