Test Bench: The Excel 29mm T29X001 Home Audio Tweeter from SEAS

The SEAS T29X001 tweeter, from the company's high-end Excel line of transducers, is a wide surround format type, like the original Vifa DX/XT tweeters, and combines the latest Composite Sound metamodal thin-ply carbon diaphragm (TPCD) technology with the seriously outstanding SEAS Excel radially charged Hexadym motor structure. This new tweeter makes the Norwegian manufacturer effectively the first company in the market to offer the latest metamodal TPCD diaphragm solution.

Voice Coil December 2022 features an updated directory of Measurement Microphones Vendors, Mike Klasco writes about how to Enhance Low-Frequency Performance, and Vance Dickason reminds us that there is a more realistic way to map speaker resonances. Test Bench characterizes two tweeters from Beyma's new Near and Mid Field (NMF) series: the T-25M 1" aluminum/magnesium alloy metal dome tweeter, and the similar T-25S 1" silk dome tweeter.

Over the past two years, Acustica Beyma expanded its R&D efforts significantly. The results are now visible as Beyma introduced a completely new family of outstanding drivers at ISE 2022. Beyma's R&D department used the latest simulation tools and a rigorous material selection process to create a new set of transducers that crossover from pure professional audio applications into the studio and high end world. A significant new range of woofers and tweeters with multiple voicing options that will appeal to speaker designers.

In Voice Coil September 2021, Vance Dickason writes about DSP crossovers from Danville Signal, Joe Hayes (Vastigo) writes about the DaS AuReality patented 3D loudspeaker technology, and Mike Klasco finds speaker-related technologies that help support smart speaker design efforts. This edition's Test Bench characterizes three new 25mm high-frequency tweeters from BlieSMa, using silk, beryllium, and diamond domes: BlieSMa’s T25S-6, T25B-6, and T25D-6.

In this edition of Voice Coil, Steve Temme explains "How to Measure Free-Field Speaker Response without an Anechoic Chamber," Mike Klasco writes about "Plastics and Composites for Audio Products in 2021," and there's an updated Speaker Enclosure Vendor Directory. James Croft provides a fascinating patent review of a speaker assembly design for low-frequency control using an acoustic dipole. And Vance Dickason characterizes two new tweeters: the D2404 Ellipticor Tweeter from Scan-Speak, and the Satori AT60NC-4 AMT Tweeter from SB Acoustics. Now available in print and online!

In this Test Bench article, Vance Dickason focused on a home audio TeXtreme diaphragm tweeter from SB Acoustics' Satori line, the TW29TXN-B-4. What makes this tweeter so special is that it has a new TeXtreme diaphragm, a novel type of material that is used in applications that require a high degree of stiffness performance in combination with ultra-light weight. This article was originally published in Voice Coil, September 2020.

American audio solutions manufacturer, MISCO, announced the introduction of the BDT-2901, a high performance 29mm soft dome tweeter to add to its growing line of premium and high-performance drivers, all designed and manufactured under the Bold North Audio brand in its St. Paul, Minnesota facility. Expanding the brand's catalog, this new driver was designed to meet requests for a precision 29mm dome tweeter with a low crossover point, ideal for use in a two-way system paired with a 6.5” or 8” woofer.

Renowned high-end OEM manufacturer Wavecor continues to keep a focus on creativity and announced the results of its latest development efforts with three new drivers, all now in stock and ready for sampling. The new transducers comprise the WF275BD01 (4 ohm) and WF275BD02 (8 ohm) 10" mid/woofers in die cast frame, the TW022WA07/09 and TW022WA08/10 high-end tweeters, and the FR070WA05 70 mm aluminum-cone full-range driver with extended bass response.

This Test Bench article addresses an interesting home audio tweeter from Creative Sound Solutions (CSS). The company sent Voice Coil its latest high-end tweeter, the LD25X, a special driver with a unique dual-gap patented XBL2 motor. CSS licenses the XBL2 technology from inventor Dan Wiggins for two of their woofers and for the LD25X tweeter. The XBL2 motor features a short voice coil traveling between two gaps, allowing for a higher Xmax than most conventional motors can provide. The LD25X tweeter features a 25mm silk dome diaphragm and flat silk surround, in a 73 mm diameter six screw cast-aluminum faceplate anodized semi-flat black. This article was originally published in Voice Coil, July 2020.

This is certainly a very heterogeneous edition of Voice Coil. It features a special report about manufacturing in Vietnam, complete with a directory and a list of trade shows. Igor Levitsky returns to offer valuable details about the latest Radian Audio Engineering LT2/LT6 Ribbon Planar transducers. James Croft reviews a "Venting System for Vehicle Speaker Assembly patent," recently granted to Harman. And, Vance Dickason characterizes the ND45 1" compression driver from Oberton, and the TW29TXN-B-4 TeXtreme diaphragm tweeter from SB Acoustics' Satori line. Voice Coil September 2020 is now available online and in print.