All items tagged with Vance Dickason (281)

Test Bench: Wavecor’s TW045WA01 Coaxial Cloth Dome/Ceramic Cone Tweeter

June 21, 2023 by Vance Dickason

Test Bench: Wavecor’s TW045WA01 Coaxial Cloth Dome/Ceramic Cone Tweeter

This Test Bench characterizes the innovative TW045WA01 dual-diaphragm coaxial tweeter from Wavecor. This driver's dual-diaphragm assembly combines a 22mm coated textile dome for high-frequency extension and a 45mm ceramic/aluminum cone, which adds low-frequency output and efficiency. The hybrid design incorporates a dual neodymium magnet motor structure and sculpted foam damping ring attached to the faceplate. A very unique driver that is certain to appear in new two-channel high-end audio loudspeakers.

Voice Coil Test Bench: Wavecor’s New SW259WA01 10.25” High Xmax Subwoofer

May 3, 2023 by Vance Dickason

Voice Coil Test Bench: Wavecor’s New SW259WA01 10.25” High Xmax Subwoofer

This article offers a detailed characterization of Wavecor's latest SW259WA01 High Xmax Subwoofer. This new 10.25” subwoofer has a generous feature set that includes a proprietary six-spoke cast-aluminum frame that is substantial enough to support the heavy ferrite motor assembly and incorporates 36 vents below the spider mounting shelf. Other features include a very stiff and thick flat profile aluminum cone, an ingenious motor system with enhanced cooling, and a 2" four-layer voice coil wound. This article was originally published in Voice Coil, February 2023.

Magnets, New Speaker Technologies, Microspeakers, and More in Voice Coil May 2023

April 28, 2023 by audioXpress Staff

Magnets, New Speaker Technologies, Microspeakers, and More in Voice Coil May 2023

In this issue. Mike Klasco looks at the exciting progress happening in magnets and new signal processing options for speaker design. James Croft compares patents of ducted loudspeaker designs for automotive. And for Test Bench, Vance Dickason characterizes the new Russo 44CDN-PK 1" PEEK diaphragm compression driver from SB Audience, and the B&C Speakers DCX354 ring radiator coaxial dual-diaphragm compression driver.

Test Bench: The SW26DBAC76-4 Shallow-Mounting Subwoofer from SB Acoustics

April 12, 2023 by Vance Dickason

Test Bench: The SW26DBAC76-4 Shallow-Mounting Subwoofer from SB Acoustics

This Test Bench article analyzes the popular SW26DBAC76-4 10" low-profile subwoofer from SB Acoustics, specifically designed (and patented) for applications that require a subwoofer that will fit into very shallow-depth enclosures. The SW26DBAC76-4 has a unique and interesting feature set that starts with an extremely shallow 79.5mm (3.13") cast-aluminum frame. The outside rim of the inverted cone is attached to the outside perimeter of the spider, and moves with the cone assembly. The inside diameter of the spider that would normally be glued to the voice coil assembly is then connected to the motor structure. This is a clever design.

Test Bench: The PTT6.5M08-NFA-01 6.5" Midrange from Purifi Audio

April 1, 2023 by Vance Dickason

Test Bench: The PTT6.5M08-NFA-01 6.5" Midrange from Purifi Audio

The PTT6.5M08-NFA-01 6.5" Midrange is the fourth woofer from Purifi Audio to be examined in Test Bench. This midrange is pretty much identical to the previously examined PTT6.5X and PTT4.0X woofers, and includes the same constant Sd surround, cone edge stiffening ring, and low magnetic hysteresis motor design. However, the PTT6.5M08-NFA-01 is optimized to have higher efficiency (91dB at 2.83V8/1m) for use with multiple woofer three-way design configurations. This article was originally published in Voice Coil, January 2023.

Test Bench: Beyma’s New NMF Series T-25S Silk Dome Tweeter

February 22, 2023 by Vance Dickason

Test Bench: Beyma’s New NMF Series T-25S Silk Dome Tweeter

Vance Dickason received two of the latest products to come out of the R&D labs of Acustica Beyma, the Spanish pro sound OEM transducer manufacturer, which always introduced some significant proprietary technologies in its transducers. The results are now visible in a new set of transducers that crossover from pure professional audio applications into the studio and high end world. This review addresses the new Beyma T-25S 1" silk dome tweeter. This article was originally published in Voice Coil, December 2022.

Test Bench: The T-25M 1" Dome Tweeter from Beyma’s New NMF Series

February 15, 2023 by Vance Dickason

Test Bench: The T-25M 1" Dome Tweeter from Beyma’s New NMF Series

Vance Dickason received two of the latest products to come out of the R&D labs of Acustica Beyma, the Spanish pro sound OEM transducer manufacturer, which celebrated 50 years in 2019. This review focuses on the T-25M NFM 1" aluminum/magnesium alloy metal dome tweeter. Specifications detail a 20W AES power handling, recommended crossover frequency of 2.5kHz (with a 12dB/octave high-pass filter), and 88dB at 2.83V/1m sensitivity. This article was originally published in Voice Coil, December 2022.

Test Bench-Wavecor’s FR4X6WA01 Oval Full-Range Driver

February 9, 2023 by Vance Dickason

Test Bench-Wavecor’s FR4X6WA01 Oval Full-Range Driver

This article characterizes the FR4X6WA01, another very interesting full-range driver from Wavecor. The small oval diaphragm driver is built on a proprietary injection molded polymer four-spoke frame with the cone assembly consisting of a black anodized aluminum cone, with a round black anodized aluminum dust cap. Powering the cone assembly is a dual neodymium motor with a copper cap shorting ring and a milled return cup with black emissive coating.

Test Bench-Purifi Audio’s PTT5.25X04-NFA-01 Midbass Woofer

January 25, 2023 by Vance Dickason

Test Bench-Purifi Audio’s PTT5.25X04-NFA-01 Midbass Woofer

For this Test Bench, Vance Dickason focused his full attention on another innovative driver from Purifi Audio, this time the PTT5.25X04-NFA-01 5.25” Midbass Woofer. At the core, this Purifi midbass woofer is pretty much identical to the PTT6.5X and PTT4.0X, and includes the same constant Sd surround and low magnetic hysteresis motor design. The Test Bench explores all the design aspects and measures all the relevant and unique features of this very original design. This article was originally published in Voice Coil, October 2022.

Test Bench: The W4-2356 4" Full Range from Tang Band (TB) Speaker

January 18, 2023 by Vance Dickason

Test Bench: The W4-2356 4" Full Range from Tang Band (TB) Speaker

The intriguing W4-2356 driver from Tang Band Speaker (TB Speaker) is built on a proprietary and patented injection-molded polymer four-spoke frame that allows the voice coil not to be centered in the 4" injection-molded polypropylene cone, but offset by about half inch. The aim for this original off-axis design, is to defeat concentric cone modes, a well-known source of coloration in round voice coil transducers. This article was originally published in Voice Coil, September 2022.

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