Test Bench: The D8404-552000 Ellipticor Cloth Diaphragm Dome Midrange from Scan-Speak

This characterization is the sixth Scan-Speak Ellipticor driver to appear in Test Bench. The Scan-Speak D8404 is a large dome midrange with a large diaphragm area and respective voice coil diameter. For a motor system, Scan-Speak basically scaled up its currently successful AirCirc tweeter motor with 12 neodymium slugs, with a titanium voice coil former, all part of the patented Symmetrical Drive SD-2 motor format. This article was originally published in Voice Coil, June 2023.

In its regular Sound Control column, Richard Honeycutt explored this book by Niels Werner Adelman-Larsen., first published in 2014. This review covers the second edition, published in 2021, which is available in e-book, softcover, and hard-cover. The book was referenced in previous Sound Control articles and details an interesting study of the acoustics for rock and pop concerts and the differences in the acoustical requirements for these types of music. An important and updated perspective on modern acoustics. This article was originally published in audioXpress, June 2023.

Voice Coil June 2023 features an extensive patent review in James Croft's Acoustic Patents column. The topic is a 2014 patent awarded to Nokia, offering an opportunity to revisit the history of electrostatic loudspeakers, with insights from Tim Mellow, one of the two listed inventors. In Test Bench, Vance Dickason focuses on the D8404-552000 Ellipticor cloth diaphragm dome midrange from Scan-Speak, and characterizes the SB Acoustics TW29BNWG beryllium dome and waveguide from the brand's prestigious Satori line.

audioXpress June 2023 combines must-read articles on Automotive Audio, essential knowledge, cutting-edge R&D, practical build projects and much more. Learn about the latest innovations and sound design for Electric Vehicles. Read about DSP tuning in automotive audio. Learn about Audioscenic's extraordinary journey in 3D audio beamforming technology, build a new signal amplifier and processor for the ACH-01 Accelerometer, and much more.