Linear Audio Vol 1 is the second issue of a series of printed bookzines dedicated to technical audio and perception. The international team of authors for this issue again offers technical audio articles on a wide ranging number of subjects, from projects and concepts to book reviews and musings: Power amplification: Ian Hegglun developed A family of high-efficiency class-A power amplifiers allowing 'green' class-A amplifiers based on inherent square-law output devices, with only half the usual dissipation. Loudspeakers and cross-overs: Jean-Claude Gaertner concludes his Project 21 DSP- based...