All items in category Voice Coil Test Bench
Test Bench: The Alpha-5-8 5" Midbass Driver from Eminence
by Vance Dickason

Test Bench: The Alpha-5-8 5" Midbass Driver from Eminence

For this test bench article, I characterized the New Eminence Alpha-5-8 5” line array/column array midbass driver. This a new 5” midwoofer from the American Standard Series, a 24-model transducer line of epoxy-acrylic finished stamped frame woofers and midranges. Applications for the Alpha 5-8 include use as a midrange in a multi-way speaker, as multiples in a line array, or as a compact column PA speaker. This article was originally published in Voice Coil, August 2018.
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Test Bench: Tang Band W3-2088SOF Micro Home Audio Subwoofer
by Vance Dickason

Test Bench: Tang Band W3-2088SOF Micro Home Audio Subwoofer

This a Test Bench of Tang Band's W3-2088SOF, a high XMAX 3.5" home audio RBM Micro subwoofer. The W3-2088SOF is built on an injection-molded eight-spoke frame that supports an unusual rectangular housing. The really unusual feature is that the W3-2088SOF does not use a spider. Instead it gets its compliance from two surrounds like a dual spider configuration. The voice coil former is vented below the inside diaphragm and also vented between the two diaphragm. This article was originally published in Voice Coil, January 2014.
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Test Bench: The 18HW1070 18” Pro Sound Woofer from FaitalPRO
by Vance Dickason

Test Bench: The 18HW1070 18” Pro Sound Woofer from FaitalPRO

In this Test Bench, Vance Dickason characterized a pro sound 18" ferrite woofer that quickly became one of FaitalPRO's best-sellers. This article was originally published in Voice Coil, January 2014 and it was missing from the online publications that we regularly post on the audioXpress.com website. As Vance Dickason noted at the time, the 18HW1070 is a carefully designed and crafted driver, with an impressive power handling capacity for PA applications.
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Test Bench: Acustica Beyma TPL200/H Pro Sound Air Velocity Transformer
by Vance Dickason

Test Bench: Acustica Beyma TPL200/H Pro Sound Air Velocity Transformer

In this edition of Test Bench, Vance Dickason characterized a different high-frequency transducer: the TPL200/H, a horn-loaded pro sound AMT from the Valencia, Spain, company Acustica Beyma. The TPL200/H is one of the Air Motion Transformers (AMT, aka AVT Air Velocity Transformer) that Beyma has developed for pro sound applications and is a Kapton horn-loaded version of the highest power handling AMT in their AMT line, rated at 120 W AES (24 W program), with a sensitivity of 104 dB 1 W/1 m. This article was originally published in Voice Coil, July 2018.
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Test Bench: The 951PB 1.4" Compression Driver from Radian Audio Engineering
by Vance Dickason

Test Bench: The 951PB 1.4" Compression Driver from Radian Audio Engineering

In this Test Bench, Vance Dickason looks at an interesting new high-frequency transducer: the 951PB, a 1.4” exit pro sound compression driver from Radian Audio Engineering, based in Orange, CA. The 951PB shares an almost identical feature set with the existing 950PB. Both have neodymium ring magnet motors, high temperature 101.6 mm (4”) diameter polyimide voice coil formers wound with copper-clad aluminum-edge wound ribbon wire voice coils. This article was originally published in Voice Coil, July 2018.
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Test Bench: Radian Audio Engineering 950PB and 760NEOPB Compression Drivers
by Vance Dickason

Test Bench: Radian Audio Engineering 950PB and 760NEOPB Compression Drivers

This was the first time Test Bench featured a product from the highly respected Radian Audio Engineering. Radian sent the 950PB and the 760NEOPB, two of the company’s flagship compression drivers. The 950PB and the 760NEOPB share several features. They are both 2” exit compression drivers, with a useful response above 10 kHz. The 950PB and the 760NEOPB use neodymium motor structures and pure aluminum diaphragms with a proprietary mylar suspension that greatly reduces second- and third-order harmonic distortion. The two transducers mainly differ with regard to their voice coil diameters. This article was originally published in Voice Coil, November 2014.
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Test Bench: B&C Speakers DE680TN 1.4" Exit Pro Sound Compression Driver
by Vance Dickason

Test Bench: B&C Speakers DE680TN 1.4" Exit Pro Sound Compression Driver

The transducer I examined in this Test Bench came from Italian OEM manufacturer B&C Speakers. The DE680TN-8 compression driver is the latest addition to B&C Speakers’ extensive ferrite and neodymium motor 1.4” exit compression drivers. In terms of features, the titanium diaphragm has been redesigned and incorporates a new bent-edge former along with a new dome and surrounds geometry. This article was originally published in Voice Coil, June 2018.
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Tang Band Speaker 25-2234SD High-Resolution 1-Inch Aluminum and Magnesium Dome Tweeter
by Vance Dickason

Tang Band Speaker 25-2234SD High-Resolution 1-Inch Aluminum and Magnesium Dome Tweeter

In this edition of Test Bench I characterized a transducer from Tang Band (TB) Speaker, the 25-2234SD, a new 1” high-resolution dome tweeter with response to 40 kHz. The 25-2234SD is a compact tweeter that features a 1” aluminum/magnesium inverted dome, a neodymium motor structure, an injection-molded faceplate, a protective grill, and a rear cavity with magnetic fluid in the motor gap for cooling. This article was originally published in Voice Coil, June 2018.
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Test Bench: The T34A-4 Tweeter from BlieSMA
by Vance Dickason

Test Bench: The T34A-4 Tweeter from BlieSMA

BlieSMa was founded January 16, 2018, by Stas Malikov. The first product being released by BlieSMa is a 34 mm tweeter, the T34A-4. Available from May 2018, the T34A-4 is a 30 mm metal aluminum/magnesium alloy dome tweeter with a substantial feature set that includes extremely low moving mass, and a fully saturated neodymium motor with copper sleeve shorting ring. Particularly impressive is the T34A-4's extremely wide frequency range, going from 1.3 kHz to 35 kHz. This article was originally published in Voice Coil, June 2018.
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Test Bench: B&C Speakers DE360-8 1” Exit Pro Sound Compression Driver
by Vance Dickason

Test Bench: B&C Speakers DE360-8 1” Exit Pro Sound Compression Driver

In this edition of Tea Bench, Vance Dickason characterizes another compression driver from Italian OEM manufacturer B&C Speakers. The DE360-8 is the latest addition to the company's extensive 18 model ferrite and neodymium motor 1” exit compression driver range. B&C Speakers supplied the ME20 horn for use with the DE360-8, which has a 90° × 60° coverage pattern. This article was originally published in Voice Coil, May 2018.
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