Test Bench: The MD60N-6 2.5" Dome Midrange from the SB Acoustics Satori Line

This is a Test Bench of one of the most intriguing high-frequency drivers from SB Acoustics' high-end Satori line, the MD60N-6 2.5" dome midrange. This design by Danesian Audio of Denmark, is a soft dome midrange that features a non-resonant coated cloth, and a large neodymium ring magnet with a dynamic dome stabilizer and flow resistor. There is also an injection-molded back-closed transmission line enclosure, filled with Thinsulate damping, mounted directly on the back side, covering its entire surface. This article was originally published in Voice Coil, August 2022.

This is a characterization of the DE111-8 pro audio high-frequency solution and corresponding ME10v2 horn from B&C Speakers. The ultra-compact neodymium 1" compression driver features an HT Polymer diaphragm driven by a 1.4" diameter voice coil, an updated Ketone polymer suspension and dome, rated for 50W continuous power handling and 2.83V/1m 107dB sensitivity. A tiny driver universally applicable for a variety of small monitor and compact line arrays. This article was originally published in Voice Coil, August 2022.

Having reviewed previously one of the early Mayht Holding B.V. patents covering their general bipolar, interleaved multiple motor structure architecture, James Croft reviews the most recent US publication (2022). This one addresses the most dramatic claim for the Mayht transducer technology of the ability to provide a greater-than 10x reduction in enclosure volume, while maintaining the same efficiency and bandwidth as compared to the current state of the art. This article was originally published in Voice Coil, August 2022

Loudspeaker manufacturers need to multiply their efforts to make their supply chains more resilient, and it becomes important to know alternative suppliers in multiple regions of the world. Among the established alternatives in the Pacific region, The Philippines has been a long recognized location for reliable companies, including some of the world's leading OEM/ODM suppliers. The article, originally published in Voice Coil, August 2022, includes a small directory of audio factories in the Philippines.

Ethan Winer offers his fifth Guitar-Controlled Synthesizer article where he describes how to make two key modules needed by every analog synthesizer: the Voltage Controlled Amplifier (VCA) and Voltage Controlled Filter (VFC). This article explains two different VCA circuits, with a simpler one that works fine for one-off projects where precise unit-to-unit repeatability isn’t needed, and a second circuit similar to the VCA in the original Moog synthesizers. This article was originally published in audioXpress, August 2022.

August is traditionally the voice-coil-focused issue of Voice Coil, offering an always-valuable perspective on the state of the loudspeaker industry. In this issue, Mike Klasco discusses Audio Manufacturing in The Philippines, James Croft explores another key Mayht patent, and Vance Dickason measures and characterizes the B&C Speakers DE111-8 1" compression driver, and the MD60N-6 2.5” Dome Midrange from SB Acoustics' Satori line.

The August 2022 issue of audioXpress, Acoustics Focus, gives a unique overview of market trends in acoustical products, with great articles on Acoustic Diffusion, Distributed Subwoofers for Room Modes, and Reverberation Control and Measurement. Michel Nieuwenhuizen proposes an improved microphone preamp for condenser microphones, Aren van Waarde builds a minimalist preamp using only discrete transistors, and Ethan Winer shares circuits for VCA and VCF analog synthesizer modules.