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audioXpress Magazine

audioXpress Magazine      September 2023


audioXpress Magazine September 2023


  audioXpress remains the authority on audio and reproduced sound by connecting manufacturers and distributors with developers, buyers and consultants around the globe! It's readers are the audio product designers, consultants, integrators, DIY enthusiasts, opinion leaders and your best customers. All of them agree that the coverage of trending topics, unique in the audio industry, make audioXpress a must read.

Every month, audioXpress combines the best educational articles on topic such audio electronics, speaker and headphone design, amplifiers (from tube to Class D), acoustics, practical test and measurement, audio engineering praxis, and standards. audioXpress provides inside stories on new audio developments, on R&D Stories, the most complete objective reviews of innovative products and software, and selects some of the best DIY audio projects from worldwide experts.



4 Audio Optimizations
Simulation tools now allow us to validate completely new loudspeaker technologies.
Editorial By J. Martins
During the recent 2023 High End show in Munich, I had the opportunity to attend a cutting-edge home theater demonstration. The room was set up with a full THX Certified Dominus Perlisten 11.7.6 surround sound system, with a StormAudio ISP Elite MK3 Immersive Sound Processor for continuous demonstrations of the state-of-the-art in home cinema. And I could enjoy the full immersiveness of the cinema experience in a properly treated room, seats and large screen in darkened conditions. When I attend this type of demonstration I always say to myself that I don't want to see a movie in anything less than that ever again.
---> Audio Optimizations


5 Supporting Companies


8 Knowles KN2 True Wireless Reference Design
And Franklin 2 Developer Kit
By Brent Butterworth
With the KN2 reference design and the Franklin 2
developer kit, Knowles makes it easier for companies
to add sophisticated true wireless earphones to their
lines whether they develop their own design or adopt
one that's ready to go. We tried both options.


26 Immersive Audio Explored
Really, What Is Immersive Audio?
By MC Patel
Any form of audio and entertainment content today
is produced and distributed as files, which are then
streamed to consumers. audioXpress invited Emotion
Systems, a company specializing in file-based audio
automation tools, to share its perspective of working
with immersive audio material.


38 Dinaburg C2S Concentric Coplanar Stabilizer Analysis
By Roger Shively
This article analyzes Dinaburg Technology's Concentric
Coplanar Stabilizer (C2S) loudspeaker technology
using COMSOL modeling to compare it with currently
available technology and verify its sound reproduction
benefits for current and future products.


46 Building A Minimally Baffled Dipole Loudspeaker
Part 1 Theory and Design of the Loudspeaker
By Charlie Laub
This article combines the theory, design, and
construction of an open baffle loudspeaker, including
the crossover design, voicing equalization, and a
practical example built by the author. The article
describes an evolution in the design approach used in
the "Baffle-Less-Ness" project that earned him first
place in the Open Unlimited category 2022 Speaker
Design Competition (Midwest Audio Fest).


audioXpress Magazine September 2023


56 Bass Reflex Performance Envelope
Part 3 A Practical Example
By Gary Gesellchen
This article series details a novel approach to
estimating the performance envelope available from
bass reflex loudspeakers based on a fourth-order
Butterworth high-pass response. Part 3 provides an
example to see how this all works together.


60 Power Transformer Parameters, Selection, And Testing
Part 11 Magnetic Field Evaluator Measurements
By Chuck Hansen
In Part 11, we discuss the tests that were made on
the remaining transformers, two E-I, two R core, and
three toroidal core types.



Acoustical Analysis Solutions
Market Update

16 Evolution Of Sound Meters And Simulation
By J. Martins
Every year the audio industry benefits from increasingly sophisticated acoustic measurements
and analysis tools. Let's summarize some of the possibilities offered by the key players in the
sound level meter space and discover the latest cutting-edge simulation tools.


Sound Control

32 Are We Having Fun Yet?
Sound Exposure and Hearing Damage Risks
By Richard Honeycutt
Exposure to noise is common today and the risks for hearing damage are also extensively
studied and recognized. Exposure to loud music shouldn't be contributing to those risks
but concert experiences through the years remain unpredictable.




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