The December 2013 Edition of audioXpress is Now Available Online

In this month’s issue, you can read our review of the elysia xfilter 500, an extraordinary equalizer “Made in Germany” in a 500-series format that offers a precise stereo image based on computer-selected, stepped potentiometers and low-tolerance film capacitors. In …

Editors’ note: Just prior to printing this issue, we learned that Ed Dell, founder of Audio Amateur, had passed away. He was 90 years old. Ed was a remarkable man whose talents ranged from DIY audio to publishing to writing. …

Passing of a Loudspeaker Pioneer It is with regret that Voice Coil notes the passing of a pioneering colleague. Clifford B. “CB” Digre, one of the audio industry’s stalwart loudspeaker manufacturers, died November 25, 2012, at age 89. More than …

Many years ago, a children’s book inspired Chuck Hansen’s interest in audio electronics. Soon, the clever kid from New Jersey was listening to New York City AM stations on a kit-built radio and disassembling every dead TV and radio he …

We’re now a month into the new year. What types of audio projects have you designed and installed? We’re interested, so send us an e-mail with “audio update” in the subject line and include details about your latest project. We’re …

The first issue of Circuit Cellar magazine—a sister publication of audioXpress that’s focused on embedded computer engineering—was printed in 1988 with a now-famous quote on the cover: inside the box still counts. Since then, engineers and innovators have used the …

Each year’s “speaker special” issue is a favorite among audioXpress readers. This 2012 edition features in-depth articles about speaker technologies and design projects, without completely ignoring other interesting topics such as tube amps. This year’s special speaker section features informative articles about a detailed loudspeaker design project and an intriguing electrostatic speaker experiment. We also included a third must-read speaker-related article, but it isn’t in the special section because it focuses on enclosures rather than speaker design.

Choosing the correct speaker enclosure can be the difference between decent sound and excellent sound. As Mike Klasco and Steve Tatarunis explain in the September 2012 issue of audioXpress, “No matter how much effort was spent on the drivers’ design, …