A2B Audio Bus: Two Alternative Power Schemes

In the second article about the latest generation A2B technology from Analog Devices - expanded with the release of the AD2437 chip - Brewster LaMacchia explores the latest possibilities for audio applications in many other areas other than automotive audio. After reviewing the three generations of A2B technology, LaMacchia expands on the alternative power schemes that deserve some investigation for multichannel digital audio applications. This article was originally published in audioXpress, August 2024.

In the fourth article from Claus Futtrup in his series about the invention, concept, and historical perspective of loudspeaker bass reflex alignments, he explores the Critically Damped Fourth-Order (CD4) bass reflex alignment. This alignment remains one of the least known and hasn't been discussed in literature related to loudspeaker design, even though it allows for interesting output properties.

With the ARC Studio, IK Multimedia introduced a new DSP market contender for room and speaker correction. The solution combines a processor bundled with the company's ARC MEMS microphone and new ARC 4 software. Although ARC Studio was designed essentially for the home studio, the market served by the Italian company, this review also explores the possibilities for stereo system users, seeking playback chain improvements.

In this issue, Vance Dickason kicks off a series of outboard DSP processor reviews, starting with the Danville dspNexus. Next, Claus Futtrup writes about the Critically Damped Fourth-Order (CD4) bass reflex alignment. As scheduled, Mike Klasco writes about New Materials and Technologies for Voice Coils, and there's an updated directory of 2024 Voice Coil winders, converters, lead out wire, and more. On Test Bench, Vance Dickason assesses the new B&C Speakers DH450-8 1" compression driver and the Stereo Integrity M3 3.5" carbon midrange driver.

audioXpress August 2024 features our traditional Acoustical Solutions Round-Up, while Active Acoustic Enhancement Systems are also discussed in the Sound Control column. Oliver Masciarotte reports from AXPONA 2024, Philipp P. Klose reviews the new IK Multimedia ARC Studio solution, and Brewster LaMacchia expands on alternative power schemes for audio applications with A2B. On audio electronics, Charlie Laub explores Notch Filters, and Todd Schneider details his High-Fidelity Active Direct Box project.