For this September 2024 issue, audioXpress looks at the vibrant world of Residential Integration and Home Theater. You can read about the latest trends and audio technologies that relate to residential installation, custom integration, and home theater. A lot has happened in this field in the past few years - when investments in residential integration increased exponentially. Major home audio brands have started to look at residential integration more seriously, with products being launched for all budgets, and even pro audio companies have now created products targeting the residential luxury markets. From audio networking to multichannel solutions and digital signal processing to support these applications, there's a lot to explore.In this issue, Stuart Yaniger offers his review of the Dayton Audio iMM-6C USB-C Calibrated Test Microphone. As mobile devices embrace USB-C, the options for audio measurements significantly expand, making it more reliable, universal, and convenient. The Dayton Audio iMM-6C offers a calibrated measurement microphone for Apple and Android tablets and smartphones at an unbelievable low price. This compact, rugged condenser microphone features a true omnidirectional pattern and a headphone or line out pass-through jack for test signals or listening. Stuart Yaniger tried it out, measured it, and shared his thoughts.
And the transition from measurements to simulation is the angle that inspired the next article by George Ntanavaras. Confronted with the impossibility to conduct reliable measurements in the low-frequency domain for his DIY speaker project in an Open-Baffle Subwoofer Simulation with AKABAK, he explores the alternative of relying solely on simulation software. His experiments contrast the near-field response measurements of his loudspeaker with the accuracy of the simulation using the AKABAK software created by R&D Team. Joerg Panzer, the creator of AKABAK, verified the file used for the simulation, allowing the author to compare his estimated and averaged performance.
Next up, Jan Didden interviews Joachim Gerhard, a name that many audioXpress readers will immediately recognize for his high-performance speakers designed over the years for Audio Physic and currently for Suesskind Audio. What motivated Jan Didden to have this conversation is that fact that Joachim Gerhard also has a lot to share about Low Noise Phono Stages. So much so that we had to divide the conversation into two parts. This month, Jan Didden talks with Joachim Gerhard about his career, and his experiments with phono preamplifier circuits and design. Next month, Joachim Gerhard further develops his design ideas and details a specific design, a discrete input stage instrumentation amplifier topology.
And expanding further on Audio Electronics, in this case applied to speaker crossovers, we have another fascinating article by Charlie Laub exploring further crossover filters. After an in-depth exploration of low-pass and high-pass notch filters and its impact in building elliptical filters in the August 2024 issue of audioXpress, this new article describes a filter Derived from Elliptic (DfE) that offers fast roll-off behavior and a combination of a relatively flat sum, a narrow and steep transition band, and well-controlled group delay position.
For our readers looking for a rewarding DIY project, this issue of audioXpress provides an "Easy-to-Build Moving-Coil Phono Preamplifier." This project, by Sam Dulaney, was inspired by the need to build a high-quality moving-coil phono preamplifier that would provide a solid platform to transfer unique material existing in vinyl to a digital format. As Sam Dulaney explains, although the project is easy-to-build, it yields good performance, doesn’t require an input transformer, and is considerably less expensive than purchasing one of similar quality.
For this issue's Hollow-State Electronics article, Richard Honeycutt explores the fascinating achievements of Leo Fender and Fender Musical Instruments. After revisiting the early history of Fender in its early years, this month we learn more about the many hollow-state Fender guitar amps released from the early 1960s to 1968, and subsequent Leo Fender's ventures. A fascinating journey of some of the most prized Fender guitar amps of a golden age.
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