CoCo-ri-Co! Guitar Tuner 
Post Project 61: KaraOkay Microphone Amplifier
audioXpress magazine reviews The Bottle Builder – Elektor’s massive compendium of tube amplifier designs
Elektor.TV | Germanium Rocks - DIY Guitar OTA Overdrive Unit
The Immersis projector system
Post project 50: Audio Indicator
Hear Hear: Linear Audio Volume 7 Released!
Fresh off the press and now purchasable in the Elektor Store, Linear Audio 7 is the eight volume in a series of bookzines dedicated to audio technology and perception. Linear Audio offers a variety of articles written by an international team of authors and accredited academics on a plethora of engaging subjects, from tutorials to circuit and system design and test reports and book reviews.
The 2014 Loudspeaker Industry Sourcebook is now available!
Looking for drivers, speaker parts, and components? Looking for consultants and designers? Looking for cables and connectors, speaker sub-assemblies, panels and materials, enclosure grilles, stuffing and assemblies, acoustic analysis software and measurement tools, integrated amplified speaker solutions, etc.? Don’t look any further. Everything you need is here! The 2014 Loudspeaker Industry Sourcebook (LIS) is now available!