Linear Audio Vol 3 is the fourth 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 tutorials to circuit design to projects and concepts to book reviews:
Renowned designer Richard Burwen explains why Audible tweaks that cannot work in your system can nevertheless cause audible differences at listening tests.
Richard Lyons explains How Discrete Signal Interpolation Improves Digital-to-Analog Conversion, while Patrick K. walks us through the Design Considerations for a Class A Amplifier Enclosure with regards to thermal and vibrational aspects.
Richard Marsh develops a high-quality buffer and amplifier for headphones and en passant tells how to equalize it for your ears with simple means in A Headphone Buffer/Amp and Auto-EQ for headphones; Steven van Raalte has a very clever design for compensating for mechanical resonance in both replay cartridges and loudspeaker drivers in Correcting transducer response with an inverse resonance filter; Sigurd Ruschkowski, motivated by Erno Borbely, shares his Passive, Discrete, DC coupled, Open Loop IV Converters. Finally, Scott Wurcer is back with his long-awaited DIY Low-noise Microphone Preamplifiers Part II.
Robert Munnig Schmidt details how to design a THX©-conforming subwoofer in A Mechatronic Approach to active subwoofer design.
Ramkumar Ramaswamy is back with A Universal Simulated Power Inductor for quick and easy filter and cross-over development; Samuel Groner designed A low noise laboratory-grade measurement preamplifier for very low level signal and noise measurements.
The Way I see it:
Stan Curtis, who for decades has shown that he knows how to design audio equipment that excels at that ultimate test – Good Sound, chimes in with the first installment of a regularly column. In Audio Design moves forward – or does it he highlights the different states of the art between analog and digital design – and notes that still lots of work has to be done.
Stuart Yaniger reviews Morgan Jones’ latest tome, the 4th edition of Valve Amplifiers, while Ovidiu Popa reviews the 2nd edition of Burkhard Vogel’s The Sound of Silence. While very different books, both reviewers conclude that each deserves a spot on the serious designer’s book shelf.