All items in category Voice Coil Test Bench
Test Bench: Scan-Speak’s 38WE/8582T00 15” Ellipticor Oval Voice Coil Woofer
by Vance Dickason

Test Bench: Scan-Speak’s 38WE/8582T00 15” Ellipticor Oval Voice Coil Woofer

This Test Bench characterizes a 15" Ellipticor woofer from Scan-Speak using the company's proven oval/elliptical design topology. The 38WE is a seriously feature rich transducer, starting with a nicely configured 10-spoke cast-aluminum frame and a completely open area below the suspended spider mounting shelf for effective cooling of the Symmetrical Drive (SD) AirCirc multi-magnet design with neodymium slugs and elliptical two-layer voice coil. This article was originally published in Voice Coil, July 2022.
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Test Bench: TB Speaker 75-1558SH High-End Home Audio 3" Dome Midrange
by Vance Dickason

Test Bench: TB Speaker 75-1558SH High-End Home Audio 3" Dome Midrange

This is an interesting Test Bench of a 3" dome midrange from Tang Band Speaker (aka TB Speaker), model 75-1558SH, intended for high-end and home audio applications. One of the most innovative and prolific OEM speaker manufacturers from Asia, Tang Band submitted a new 75mm diameter soft dome midrange, using a coated cloth diaphragm and surround, with a large neodymium magnet and distortion reducing shorting ring. The steel cup has a foam damped vent that loads into a shaped and 100% polyester-filled injection-molded back enclosure. This article was originally published in Voice Coil, June 2022.
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Test Bench: Celestion CDX1-1412 Compact 1" Pro Sound Compression Driver
by Vance Dickason

Test Bench: Celestion CDX1-1412 Compact 1" Pro Sound Compression Driver

The Celestion CDX1-1412 Compression Driver is a compact 1" unit intended for professional audio applications, a traditional segment for the UK-based OEM manufacturer. This compression driver features a FEA-optimized neodymium ring magnet motor structure, a nominal power handling of 35W, a 2kHz recommended crossover frequency (with a minimum 12dB/octave high-pass network), and 106dB sensitivity (1W/1m) measured with its own 1" H1-9050 90°x50° constant directivity horn. This article was originally published in Voice Coil, June 2022.
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FaitalPRO 2FE24 Pro Sound 2.5" Full-Range
by Vance Dickason

FaitalPRO 2FE24 Pro Sound 2.5" Full-Range

The focus for this Test Bench is the 2FE24 2.5” full-range driver from FaitalPRO, an interesting small diameter full-range design suitable for pro audio applications such as PA line source speakers. The 2FE24 is built on a proprietary injection-molded polycarbonate four-spoke frame, and the cone assembly consists of an uncoated paper cone and dust cap, low loss half-roll NBR surround, and elevated cloth spider. Powering the cone assembly is a neodymium ring magnet and a milled return cup fitted to a 19mm diameter voice coil wound with aluminum wire on a Kapton former. This article was originally published in Voice Coil, May 2022.
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Test Bench: The E180HE-44 Full-Range Subwoofer from the Dayton Audio Epique Line
by Vance Dickason

Test Bench: The E180HE-44 Full-Range Subwoofer from the Dayton Audio Epique Line

In this article, Vance Dickason characterizes the E180HE-44 woofer, from the Dayton Audio Epique lineup. As with the E150HE from the same range, the E180HE-44 uses the patented Multiple Magnet Air Gap (MMAG) technology, invented by Enrique Stiles and patented by Step Technologies. The E180HE is a scaled up (7") version of the E150HE, and has a similar feature set but with a secondary magnet system comprised of six ferrite disks, which act as magnetic “diodes” pulling the flux from the main magnet into the top 7mm gap. This article was originally published in Voice Coil, May 2022.
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Test Bench: Beyma’s New 1” CD1ND Compact Polyimide Diaphragm Compression Driver and TD-194 Horn
by Vance Dickason

Test Bench: Beyma’s New 1” CD1ND Compact Polyimide Diaphragm Compression Driver and TD-194 Horn

This Test Bench focuses on Beyma’s new 1" CD1ND Compact Polyimide Diaphragm Compression Driver, a product oriented for demanding professional audio applications. The 1” throat uber-compact CD1ND compression driver delivers a “high-quality” cost-effective option for studio monitors or stage monitors, as possible examples. The Beyma CD1ND uses a 1” diameter edge-wound voice coil, driving the field-replaceable diaphragm and lightweight neodymium ring magnet motor. This article was originally published in Voice Coil, April 2022.
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Test Bench: The AMT 23CM1.1-C Air Motion Transformer from Mundorf
by Vance Dickason

Test Bench: The AMT 23CM1.1-C Air Motion Transformer from Mundorf

The AMT 23CM1.1-C high-end Air Motion Transformer is the second model from the series launched by Mundorf. Following the explication of the U80W Mundorf AMT, published in the March 2022 issue of Voice Coil, Vance Dickason dives deeper into the series and proprietary diaphragm material used in all the Mundorf AMTs. Features for the Mundorf AMT 23CM1.1-C include a pleated AMT diaphragm, an optimized injection-molded rear chamber and flat round metal face plate, rated for 125W power handling with a minimum second-order 2.2kHz high-pass network. This article was originally published in Voice Coil, April 2022.
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Test Bench: Eighteen Sound NSD1095N Compression Driver and XT120 Horn
by Vance Dickason

Test Bench: Eighteen Sound NSD1095N Compression Driver and XT120 Horn

The NSD1095N is a 1" throat compression driver with a compact footprint for “high quality” sound applications in professional audio, from studio monitors or stage monitors to high-power sound reinforcement cabinets. It uses a field replaceable True Piston Motion (TPM) TiN coated titanium diaphragm, extending the frequency response by 25% and incorporates a proprietary phase plug architecture that has been designed to give a smooth coherent wave front at the horn entrance across the whole working frequency range.
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Test Bench: The U80W Air Motion Transformer from Mundorf
by Vance Dickason

Test Bench: The U80W Air Motion Transformer from Mundorf

As a respected manufacturer of high-quality condensers and crossover components, Mundorf is also capitalizing on the industry's “renaissance” in AMTs and now offers five models in this updated U series, each driver having the same width, but different heights. The U80W AMT model features a 63mm x 19mm pleated proprietary AMT diaphragm, an optimized rear chamber, a flat face plate with an optional secondary aluminum face plate, and is rated for 80W power handling and 94dB sensitivity. The U Series is the fourth in Mundorf's AMT portfolio. This article was originally published in Voice Coil, March 2022.
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Test Bench: SB Acoustics’ MW19TX-8 Home Audio TPCD (TeXtreme) Cone Midbass Driver
by Vance Dickason

Test Bench: SB Acoustics’ MW19TX-8 Home Audio TPCD (TeXtreme) Cone Midbass Driver

The Satori MW19TX-8 TPCD cone 7.5" woofer is the fourth TPCD diaphragm transducer to be explicated in Test Bench, the first being an Eminence compression driver and the remaining all woofers from SB Acoustics. The high-end MW19TX-8 has a substantial feature set with similar features as the rest of Satori series with TPCD cones, impressing immediately by its distinctive cosmetics and subjective performance, which this characterization illustrates.
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