A FINE Circle Speaker Design Tutorial. Part 2 — The Tweeter

This is the second part of Peter Larsen's tutorial for the design of a complete loudspeaker from transducer to final product. The target design is a two-way speaker with a 6.5" woofer and a 1" dome tweeter. Having previously explained the woofer design, in this second article, Peter Larsen explains the process for a 1" silk dome tweeter.

For Voice Coil, Peter Larsen developed a tutorial for the design of a complete loudspeaker from transducer to final product. A great way to gain a practical perspective of the whole family of Loudsoft software tools. The target design will be a two-way speaker with a 6.5" woofer and a 1" dome tweeter, and this issue contains part one of this valuable exercise.

Voice Coil April 2022 is now available and brings an interesting overview of the latest updates to Loudsoft's FINE Suspension Nonlinear FEA Spider and Surround Design software. Mike Klasco discusses Cables, Lead Wires, and Connector/Terminal Technology, and there's an updated directory of vendors and manufacturers in those product segments. Then, Vance Dickason characterizes the AMT 23CM1.1-C Air Motion Transformer from Mundorf, and the Beyma CD1ND 1" Polyimide Diaphragm Compression Driver and TD-194 compact horn.

This Test Bench explication characterizes the 15DS100 15” professional subwoofer from B&C Speakers. This new transducer from the Italian company is a very high power handling design, able to deliver 3kW continuous (1.6W nominal), thanks to B&C's latest generation of very long voice coils - a great asset in applications from discreet PA subwoofers to three-way PA speakers. The B&C 15DS100-4 uses a proprietary 12-spoke cast aluminum frame with cooling vents for the neodymium FEA motor, which uses a 4” four-layer voice coil wound with round aluminum wire on a non-conducting glass fiber former. This article was originally published in Voice Coil, October 2021.

I frequently learn about new products from brands large and small, which sometimes remain unnoticed for multiple reasons (and I don't mean by the press) regardless of how innovative they are. That's a topic in itself to be addressed in a separate editorial one of these days... This week, I spent some time looking at a few speakers that I think deserve a spotlight. Please note that I have not heard those speakers. I just think they are interesting products that deserve a mention.

SEAS announced the launch of its new Titan product line in the Prestige Series, implementing FEA-optimized magnet systems with copper caps and rings, and titanium voice coil formers, in combination with matte black aluminum cones and domes, among many other improved features. SEAS' Prestige series offers a large array of sizes and diaphragm materials to perfectly fit the exacting requirements of both the OEM and distribution markets. The new Prestige Titan series is a long-awaited refreshment of this product line.

Peerless by Tymphany announced that its STW-350F188PR01-04, a 15” subwoofer built for high-performance HiFi applications, previously previewed at trade-shows, is now available for distribution as part of the brand's catalog. The new STW-350, features an 8” voice coil, triple suspension, and a dual-spider design, providing superior low-frequency performance in a smaller-than-traditional enclosure.

The March 2017 edition of Voice Coil is now available. Read everything you need to know about the 2017 ALMA International Symposium And Expo (AISE). Read Christopher J. Struck's Technical Notes on Equal Loudness Contours and Mike Klasco's Spotlight on Engineering Simulation Software for speaker design, which includes a directory of software manufacturers. This month's Test Bench, characterizes two new compression drivers from FaitalPRO and Celestion.

Among several new products scheduled for unveiling at the forthcoming Winter NAMM 2016 show, Celestion announced it will extend its next generation CF range of high-end ferrite magnet professional audio loudspeakers with a new 4 Ohm CF1840H cast frame model. The new 1000W LF driver features long throw and high sensitivity with superior cooling features.

Beyma introduced its WR family, which is composed by three new designed low frequency drivers: 10” (10WR300), 12” (12WR400) and 15” (15WR400). The WR family was designed to replace the existing SM family, to be discontinued in January 2016, and was first introduced at the 2015 NAMM Show.