LEA Professional Introduces New High Power Connected Amplifiers at ISE 2020

LEA Professional, the emerging heavyweight in amplifier and systems design launched four new IoT-enabled high-power connected amplifiers that set a new standard in performance, connectivity and ease of deployment. The new LEA Connect Series amplifiers are available in four-channel configurations ranging from 1,500 to 3,000 watts and in Network Connect and Dante Connect iterations.

In this final article of the four-part series, Andy Lewis expands upon the Back EMF concepts hinted at in the previous three articles in this series. This article explores the Electrical and Newtonian filters and their intersections, observations on reactive parallel filters as pertains to Back EMF and energy losses. The theories can be applied to virtually all areas of loudspeaker design. This article was originally published in audioXpress, November 2018.

The February 2020 edition of audioXpress features a Market Update on Microphones, addressing the latest technology and application trends in this expanding product segment, including an article explaining how Nureva created a groundbreaking approach to gain control that cuts conference call annoyance. And Richard Honeycutt explains how to choose and position Choir Microphones, while Michael Steffes discusses interfacing measurement mics to Delta-Sigma ADCs. Get the new edition now!

This Voice Coil’s Spotlight, written by Vance Dickason with commentary from Floyd Toole, Wolfgang Klippel, Andrew Jones, and James Croft, focuses on Zero Phase in Studio Monitors. As Dickason explains, "the implication of using FIR filters to zero out the phase of a loudspeaker to improve its subjective performance seems inherently flawed given all the research done over years that concluded that the human ear is not very sensitive to phase or group delay." This article was originally published in Voice Coil, October 2019.

One of the most important audio events for the speaker building and DIY audio communities, the Midwest Audiofest (MWAF) is held in Springboro, OH, in July every year. Sponsored by an impressive group of vendors and hosted by Parts Express, this event combines several activities including a huge tent sale at Parts Express. For Thomas Perazella the highlight of the event is the Speaker Design Competition, for which he was again one of the competition judges. This article was originally published in audioXpress, October 2019.

In this speaker review, Oliver Masciarotte and Kent Peterson (of Warkwyn) listen, measure, and listen again to the PureAudioProject Trio15 Heil AMT speaker system. This is a fascinating modular system, in this case designed using an ESS 6" Air Motion Transformer (AMT) and two Eminence 15" drivers, specifically optimized for use in open-baffle applications. This article was originally published in audioXpress, September 2019.

Sonus faber announced the launch of their Olympica Nova high end speaker collection, with seven completely new models, at the 16th Annual Rocky Mountain International Audio Fest (RMAF). The newly expanded Olympica Nova series embraces the authentic values that inspired the original Olympica line while adding a substantial amount of freshly developed technology, from new drivers and crossovers, to a new cabinet structure and internal volume tuning, and a new exterior look.

MartinLogan announced seven new Motion Series loudspeakers for music or home cinemas. Praised for performance and value since its introduction, when it came time to introduce a new generation of the Motion Series, MartinLogan decided not to mess with a good thing. The new line of modern, multi-application speakers utilizes the same benchmark-performance technology as previous generations of the Motion Series, updated with a modern and stylish new design. Available October 2019, the Motion Series features seven new models, including two floorstanding, two bookshelf, and two center channel speakers.

The Kali Audio LP-6 Powered Studio Monitors are speakers with a plain, business-like appearance, that we would easily be misled to think are just another run-of-the-mill home studio affordable offering. If it wasn't for the fact that Kali Audio is a new California-based company formed by a group of (now former) JBL employees. The Kali LP-6s are serious contenders in the studio space, and can be also formidable affordable options on any other environment. This article was originally published in audioXpress, August 2019.

Now, what's a Null Tester? The Null Tester sends the same audio signal through two paths, then it electronically subtracts one signal from the other to obtain the difference. For years, many audiophiles and even some audio professionals have believed that signal wires can sound different. Obsessed with settling this dilemma, Winer designed a Null Tester device that compares any two signal wires and reveals their difference to a level below -110 dB. This article was originally published in audioXpress, June 2019.