All items tagged with Test Bench (287)
Test Bench: Beyma CD-11Nd Compression Driver and TD-194 Horn
August 4, 2021 by Vance Dickason

Test Bench: Beyma CD-11Nd Compression Driver and TD-194 Horn

This Test Bench characterizes the CD-11Nd compression driver and TD-194 1" horn from pro sound OEM, Acustica Beyma. The CD-11Nd has a diameter voice coil wound both inside and outside of a non-conduction Kapton-type former with aluminum wire. The diaphragm and surround are composed of a single piece of PM4, which is a proprietary high-tech polymer that, according to the company, has never before been used for audio. This article was published in Voice Coil, April 2021.
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Raising the Bar for Loudspeaker Knowledge in Voice Coil August 2021
July 23, 2021 by audioXpress Staff

Raising the Bar for Loudspeaker Knowledge in Voice Coil August 2021

It's time for Loudspeaker News and Developments, unique technology Spotlights, valuable industry Directories, great speaker patent reviews, and Vance Dickason's speaker driver characterizations in Test Bench. This month, Bruno Putzeys and Lars Risbo write about their speaker research for Purifi Audio, James Croft reviews an acoustic low-pass filter patent awarded to Bujeon, and Vance Dickason tests the 5CXN44 coaxial driver from B&C Speakers. This edition features updated directories of Voice Coil and Magnet Vendors and Distributors.
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Test Bench: Eighteen Sound ND1TP Compression Driver and XT120 Horn
July 20, 2021 by Vance Dickason

Test Bench: Eighteen Sound ND1TP Compression Driver and XT120 Horn

The product on this Test Bench is Eighteen Sound’s ND1TP Compression Driver and XT120 Horn. Already the result of the company's efforts in the aftermath of the Eighteen Sound (and Ciare) acquisition by B&C Speakers in 2018. The ultra-compact ND1TP compression driver has a 25mm (1") throat diameter driven by a 44mm (1.75") diameter edge-wound voice coil wound with copper-clad aluminum wire (CCAW) on a non-conducting Nomex former with a proprietary treatment. This article was published in Voice Coil, April 2021.
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Cutting-Edge Speaker Innovation and Glue Joints Inside Voice Coil July 2021
June 25, 2021 by audioXpress Staff

Cutting-Edge Speaker Innovation and Glue Joints Inside Voice Coil July 2021

Voice Coil July 2021 is now available and full of valuable articles. Starting with Mike Klasco's insights on glue joints and attachment techniques used in speaker design. Followed by an updated and comprehensive directory of manufacturers and suppliers of adhesives, coatings, and treatments for the speaker industry. James Croft reviews the recent Bidirectional Speaker patent awarded to Resonado Labs, and Vance Dickason places the totally unique Purifi PTT6.5X04-NFA-01 midbass driver on Test Bench, followed by Beyma's 12LEX1300Nd 12” woofer with its unique Maltcross cooling system. Now available in print and online!
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Test Bench: The AT60NC-4 AMT Tweeter from SB Acoustics’ Satori Line
June 24, 2021 by Vance Dickason

Test Bench: The AT60NC-4 AMT Tweeter from SB Acoustics’ Satori Line

The new AT60NC-4 AMT tweeter from SB Acoustics’ Satori Line follows the recent “renaissance” of Air Motion Transformer (AMT or Air Velocity Transformer aka AVT) over the last several years. The Satori AT60CN-4 is targeted at high-end audio applications. Its features include a damped foil and Kapton 43mm × 29mm pleated AMT diaphragm, with an optimized rear chamber, and two-part face plate. This article was originally published in Voice Coil, March 2021.
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Test Bench: The New D2404/552000 Ellipticor Tweeter from Scan-Speak
June 16, 2021 by Vance Dickason

Test Bench: The New D2404/552000 Ellipticor Tweeter from Scan-Speak

In earlier editions, Voice Coil introduced the Scan-Speak Ellipticor drivers with its unique oval voice coil shapes to defeat cone and dome standing wave modes. With the design and concept becoming extremely popular in the high-end two-channel market, the elliptical-shaped series of Scan-Speak drivers continues to expand. The new D2404/552000 Ellipticor 24mm tweeter is the little brother to the D3404 tweeter. This article was originally published in Voice Coil, March 2021.
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Test Bench: The Wavecor FR070WA05 Aluminum Cone Full-Range 2.75” Driver
May 12, 2021 by Vance Dickason

Test Bench: The Wavecor FR070WA05 Aluminum Cone Full-Range 2.75” Driver

The driver to be characterized in this article is Wavecor’s FR070WA05, a 2.75" full-range driver with a black anodized aluminum cone, built on a proprietary injection-molded polymer four-spoke frame. Like most contemporary drivers, the area below the spider mounting shelf is totally open for increased cooling. Powering the cone assembly is a dual neodymium motor. This article was originally published in Voice Coil, February 2021.
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Test Bench: The AUGWL0006-JN01 Aluminum Cone Woofer from Eastech’s Punktkilde Line
May 6, 2021 by Vance Dickason

Test Bench: The AUGWL0006-JN01 Aluminum Cone Woofer from Eastech’s Punktkilde Line

The AUGWL0006-JN01 is a new 2.25" woofer from Eastech’s Punktkilde lineup. With a depth of 7/8", the AUGWL0006-JN01 is part of the Ultra-Thin Series. The feature set is rather clever, using a black anodized aluminum cone assembly and dust cap, suspended with a NBR surround. A 25mm round foam surround supplies the additional compliance, and a large 35.5mm diameter under hung voice coil rides inside a double set of neodymium ring magnets. This article was originally published in Voice Coil, February 2021.
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Test Bench: The BWX-6502 Midbass from MISCO’s Bold North Audio Line
April 27, 2021 by Vance Dickason

Test Bench: The BWX-6502 Midbass from MISCO’s Bold North Audio Line

In this article, Vance Dickason characterizes the Bold North Audio BWX-6502 Midbass, which comes from a series of exciting new drivers designed and manufactured in the US by MISCO (Minneapolis Speaker Company). The BWX-6502 is built on the same platform with a similar XBL2 "dual-gap" motor design structure to the BWX-6501 model but with a cone assembly consisting of an Abaca fiber (paper) cone and a 60mm (2.4") diameter Abaca fiber dust cap, with compliance provided by a wide high excursion NBR surround, and a 3.5" diameter flat cotton spider (damper). This article was originally published in Voice Coil, January 2021.
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Test Bench: Wavecor TW022WA09 Cloth Dome Tweeter
April 12, 2021 by Vance Dickason

Test Bench: Wavecor TW022WA09 Cloth Dome Tweeter

The driver in this Test Bench is the Wavecor TW022WA09 22mm high-end textile dome tweeter. The TW022WA09 was unveiled by Wavecor together with the TW022WA08/10 high-end tweeter, a new series of 22mm chambered neodymium drivers with increased sensitivity. The precision cloth (textile) dome ensures an extended frequency response, while the voice coil design offers higher power handling and low resonance frequency. This article was originally published in Voice Coil, January 2021
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