Test Bench: The SEAS L19RNX1 Prestige Titan Series Woofer

In this edition of Test Bench, Vance Dickason characterizes the recently announced SEAS L19RNX1 woofer from the company's new Prestige Titan Series. The L19RNX1 is the second woofer in this new 19 cm series of SEAS woofers, the first being the W19NX001 Excel Graphene-coated magnesium cone woofer. The L19RNX1 7” woofer uses a frame that is completely open beneath the spider mounting shelf, and with a small 12 mm diameter pole vent, so substantial air can be pumped past the voice coil and over the front plate. This article was originally published in Voice Coil, July 2020.

Stuart Yaniger examines new amplifier solutions from two disrupting audio companies. Purifi Audio from Denmark, founded by Bruno Putzeys, Lars Risbo, and Peter Lyngdorf, together with a remarkable engineering team; and Orchard Audio, with a product developed from the creativity and entrepreneurship of Leonid (Leo) Ayzenshtat, in this case exploring the latest gallium nitride (GaN) semiconductor technology. This article was originally published in audioXpress, July 2020.

In this article, Richard Honeycutt reviews John Kane’s book, which examines how sound engineering pioneer Bill Hanley’s contributions in outdoor live sound helped create the entire music production industry. Through an extensive nine-year interview and archival process, Kane uncovered how Hanley and his company, Hanley Sound, impacted a developing festival and concert marketplace. This article was originally published in audioXpress, July 2020.

The July 2020 edition of Voice Coil magazine is a strong issue, offering the most comprehensive sourcing directory on Adhesives, Coatings, Sealant, and Dispenser Providers in 2020, a Spotlight article by David Lindberg on Waterproofing of Audio Devices, plus the always brilliant patent reviews by James Croft. For July, Vance Dickason characterizes the recent SEAS L19RNX1 woofer from the company's new Prestige Titan Series, and the LD25X, an interesting high-end tweeter from Creative Sound Solutions (CSS). Now available to download!

audioXpress July 2020 is now available, and there's a quiet revolution happening in audio amplification. Essentially it is the direct result of strong innovation in Class-D technology, with incremental improvements introduced on multiple fronts. In this month's Market Update, J. Martins details a few of the "Class-D Products Getting Smarter" and then Stuart Yaniger discusses Class-D amplifiers from two of those companies: Purifi Audio and Orchard Audio. Also, Ward Maas details his visit to Purifi Audio. Dimitri Danyuk shares his "Fully Balanced Transconductance Preamplifier" project, Roger Russell is "Hunting the Elusive Transient," and Ed Simon concludes his "Powering Your Circuits" series. And there's much more valuable content in this edition. Download or view your issue online now.