Alta Audio Receives US Patent for its XTL II Hybrid Transmission Line Technology

Alta Audio, the company created by industry veteran Michael Levy, announced that it received US patent 11917361B2 for its XTL Transmission Line technology. Recently introduced in the company's latest Aphrodite four-way loudspeaker, updating an already patented original technology that applies the cabinet internal geometry to tune the frequency response, the new approach evolves to a hybrid transmission line, a ported enclosure design that Michael Levy says greatly increases power handling, lowers distortion, and extends bass frequencies.

James Croft has fun reviewing a Controlled Passive Radiator patent awarded to inventor Tony Doy, on behalf of Sonos (Santa Barbara, CA.) The patent details multiple techniques to control a passive radiator, including a device buffering successive samples of audio content and predictive techniques on active designs. With this extensive review, Voice Coil readers will gain a valuable perspective on key possible innovation areas. This article was originally published in Voice Coil, October 2018.

Sound Solutions International (SSI) introduced its latest family of high-performance microspeakers featuring improvements on loudness, linearity, and distortion levels by featuring the company's Coil-Anchor System (CAS) rocking suppression technology. The new microspeakers can easily scale for multiple applications and requirements in highly constrained mobile and portable designs. The patent-pending high-excursion Manticore speaker family already includes three models for smartphones and laptop/tablet applications.

Powersoft D-Cell504 IS high-power amplifier modules have been designed to drive a unique “Wall of Bass” (as low as 7 Hz) in an Austrian nightclub. The newly-reconstructed Club SUB, in the city of Wiener Neustadt, set out to integrate a …