The March 2022 challenge of Voice Coil affords a whole overview of loudspeaker cupboard design choices, plastic enclosure supplies, and manufacturing methods, in addition to an up to date listing of Speaker Enclosure Distributors. This month, in Check Bench, Vance Dickason characterizes the Mundorf U80W from its newest U Sequence of Air Movement Transformers. And addressing demanding skilled audio functions, this challenge additionally features a Check Bench on Eighteen Sound’s NSD1095N Compression Driver and XT120 Horn. Begin studying on-line. Printed copies are on the way in which.
The March 2022 challenge of Voice Coil opens with Business Information & Developments reporting on the newest era Balanced Mode Radiator (BMR) driver designs from Tectonic Audio Labs. Because it was introduced at CES 2022, Tectonic has optimized the fundamental ideas of the BMR know-how and created new superior iterations which are extra highly effective, extra compact, and less expensive. These embrace the newest BMR Excessive Facet Ratio Panel (HARP) transducers, utilizing the corporate’s newest twin drive/single motor patented design, and the next-generation Tectonic BMR-k drivers.
This version of Voice Coil focuses on speaker enclosures, and the subject is addressed in a brand new article by Mike Klasco (Menlo Scientific) discussing choices for plastic enclosures. Addressing loudspeaker driver design basically, this text explores enclosure traits, development options, benefit comparisons between wooden and wooden particle board cupboards, and manufacturing methods. He additionally discusses the truth that tooling for injection molds for plastic components can now be completed immediately from 3D modeling information on distant CNC machines, which may be anyplace on the earth, making plastics an more and more viable possibility. The article addresses numerous choices to satisfy the challenges in numerous speaker designs, from typical injection-molded plastics to composites, and the newest materials formulations supporting sustainability and design to manufacturing choices.
As Voice Coil custom mandates, this challenge additionally options an up to date listing of Speaker Enclosure Distributors, meticulously compiled by Nora Wong (Menlo Scientific), together with up to date characterizations of many corporations. As factories more and more increase from making high quality speaker enclosures on to supplying full loudspeaker system meeting, together with the electronics, it is at all times good to know that extremely specialised corporations proceed to supply cupboard manufacturing all around the world.
And this challenge consists of one other Acoustic Patents article from the Archives of James Croft, chosen by Vance Dickason. That is the second patent overview to be revisited that examined rear cancellation passive cardioid loudspeaker design as a manner of compensating for the “Allison Impact”. On this case, a patent granted to Dutch & Dutch B.V. (Netherlands), and itemizing as inventors the names of Koenraad August Jan Knaapen, Eric Van Duin, Martijn Gerardus Mensink, Kevin Ivan Kleine, and George Ortega. An attention-grabbing learn of a design submitted in 2014.
Vance Dickason additionally affords a beneficiant Check Bench characterization of the U80W Air Movement Transformer from Mundorf’s new high-end U Sequence. It is a well timed alternative to be taught extra concerning the Mundorf vary of AMTs on condition that the German firm is historically very mysterious and would not ship out press releases when it introduces a brand new product. Historically a a lot revered producer of high-quality condensers and crossover parts, Mundorf can be capitalizing on the trade’s “renaissance” in AMTs and now affords 5 fashions on this up to date U sequence, every driver having the identical width, however completely different heights.
The U80W AMT mannequin includes a 63mm x 19mm pleated proprietary AMT diaphragm, an optimized rear chamber, a flat face plate with an non-obligatory secondary aluminum face plate, and is rated for 80W energy dealing with and 94dB sensitivity. The U Sequence is the fourth in Mundorf’s AMT portfolio, which additionally consists of Professional drivers (at present being up to date), the HiFi AMT Dipole sequence, and the high-end audio AMT Live performance sequence.
This challenge of Voice Coil additionally features a Check Bench on Eighteen Sound’s NSD1095N Compression Driver and XT120 Horn. This a really refined design from the corporate that now’s a part of the B&C Audio system group, however stays an unbiased operation. The NSD1095N is a 1″ throat compression driver with a compact footprint for “top quality” sound functions in skilled audio, from studio screens or stage screens to high-power sound reinforcement cupboards.
The Eighteen Sound NSD1095N compression driver is pushed by an optimized neodymium ring magnet motor construction and 44mm (1.75”) diameter edge-wound voice coil wound with copper-clad aluminum wire (CCAW) on a non-conducting Nomex former with a proprietary remedy. This specifically handled Nomex former exhibits a 30% greater worth of tensile elongation at working temperatures (200 C) when in comparison with Kapton. This meeting drives the sphere replaceable True Piston Movement (TPM) TiN coated titanium diaphragm, extending the frequency response by 25%. The NSD1095N additionally incorporates a proprietary section plug structure that has been designed to provide a clean coherent wave entrance on the horn entrance throughout the entire working frequency vary.
Lastly, this challenge additionally features a beneficiant dose of Business Watch tales, discussing some cutting-edge analysis relating to a brand new kind of sound wave propagation, generated by Affiliate Professor of Physics Dr. Shubo Wang, of the Metropolis College of Hong Kong (CityU), and described in a paper not too long ago submitted to the scientific journal Nature Communications. Additionally mentioned by Vance Dickason is the newest Client Know-how Affiliation (CTA) market indicators and forecast, plus trade occasion updates.
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