All items in category Voice Coil Test Bench
Test Bench: The New Beyma CD-314Nd/TI Compression Driver and Horn
by Vance Dickason

Test Bench: The New Beyma CD-314Nd/TI Compression Driver and Horn

Acustica Beyma continues to expand its range of products from solid foundations in professional audio, now also to emerging installation and even high-fidelity applications, while implementing a solid environmental stance. This 1.4" throat, high-power-handling compression driver, characterized with the new Beyma 60° × 40° TD-1464P horn, is targeted for mid- to large-venue PA systems and is one example of those efforts.
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Test Bench: GAIT BGD-D72-64-4-0A1 Glass Diaphragm 1" Dome Tweeter
by Vance Dickason

Test Bench: GAIT BGD-D72-64-4-0A1 Glass Diaphragm 1" Dome Tweeter

Glass Acoustic Innovations Technologies (GAIT) is a company from Taiwan and a renowned specialist in Ultra-Thin Glass (UTG) diaphragm technology, quickly gaining recognition in hifi and high-end audio circles. This 1" dome super tweeter uses a unique glass diaphragm formed using a chemical strengthening process, and includes a 1” voice coil and neodymium magnet motor, assembled with an injection-molded plastic faceplate, a phase plug, and a damped rear chamber.
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Test Bench: Dayton Audio’s Ultimax II 8-22 8” Subwoofer
by Vance Dickason

Test Bench: Dayton Audio’s Ultimax II 8-22 8” Subwoofer

This powerful Dayton Audio Ultimax II 8-22 8" subwoofer from the company's recently upgraded series maintains many common features with the original Ultimax drivers. After having examined the Ultimax II 10" version in January 2025, this Test Bench looks at the new 8" version where the very stiff and thick carbon fiber cone stands out with the NBR surround, assisted by the two flat 6" diameter cloth spiders.
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Test Bench: Faital Pro’s 5PR120 - 5” Pro Midrange Driver
by Vance Dickason

Test Bench: Faital Pro’s 5PR120 - 5” Pro Midrange Driver

The Faital Pro 5PR120 is a high sensitivity and high-power handling 5” midrange driver, built on a proprietary six-spoke cast-aluminum frame, with four vents below the spider mounting shelf, and additional cooling provided by a pole vent. It features a curvilinear inverted single piece “bowl” shaped paper cone and black anodized aluminum dust cap. The motor is a FEA-optimized neodymium ring, and driving the cone is a 32mm voice coil wound with round copper wire on a non-conducting Kapton former.
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Test Bench: Dayton Audio’s UMII10-22 Ultimax II 10” Subwoofer
by Vance Dickason

Test Bench: Dayton Audio’s UMII10-22 Ultimax II 10” Subwoofer

This Test Bench characterizes the Dayton Audio UMII10-22 Ultimax II 10" Subwoofer, a recent example of the upgraded, high-performance designs that succeeded the brand’s original Ultimax subwoofer line. Available for now in four diameters (18", 12", 10", and 8"), the common feature set for the new line includes a large aluminum shorting ring and aluminum pole sleeve for lower magnetic distortion, a lightweight and rigid woven carbon fiber cone assembly, high Xmax, with a frame and motor designed with extensive thermal venting, all optimized for compact sealed enclosures.
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Test Bench: Scan-Speak’s D3004/666000 Metamodal TPCD Dome AirCirc Motor Tweeter
by Vance Dickason

Test Bench: Scan-Speak’s D3004/666000 Metamodal TPCD Dome AirCirc Motor Tweeter

Vance Dickason has spent some time characterizing the new Scan-Speak D3004/666000 tweeter, the first to combine a metamodal Thin-ply Carbon Diaphragm (TPCD) dome with the company's AirCirc motor. This new Scan-Speak tweeter is not a common "evolutionary" design but a joint manufacturing project with Swedish company Composite Sound to develop new second-generation TPCD diaphragms with the characteristics and able to rival the performance levels of a beryllium dome.
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Test Bench: SB Acoustics Satori MR16TX-8 TPCD 6.5" Midrange
by Vance Dickason

Test Bench: SB Acoustics Satori MR16TX-8 TPCD 6.5" Midrange

The 6.5" MR16TX-8 TPCD Midrange from SB Acoustics' prestige Satori line targets hifi and high-end audio applications, and expands the company's already significant investment in TPCD Textreme diaphragms. The cone assembly consists of a curvilinear inverted single piece, "bowl" shaped TPCD cone, glued to an inverted NBR surround, with the remaining compliance coming from a flat BIMAX spider. The motor is an FEA-optimized neodymium magnet and a 1.4" voice coil with a nonconducting fiberglass former.
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Test Bench: Faital Pro HF110 1" Neodymium Motor Compression Driver
by Vance Dickason

Test Bench: Faital Pro HF110 1" Neodymium Motor Compression Driver

This Test Bench characterizes a 1" conical exit compression driver from Faital Pro that was measured along with the brand's STH100 elliptical Tractrix flare horn (80° × 70°). Driven by a voice coil wound with aluminum wire on a high Qm non-conducting Kapton former, and powered by a neodymium ring magnet, the HF110 compression driver targets applications such as stage monitors and PA speakers with a 2kHz recommended crossover frequency (second-order or higher high-pass filter).
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Test Bench: The New 7.5” MT19CP-8 Coincident Coaxial Driver from the SB Acoustics Satori Line
by Vance Dickason

Test Bench: The New 7.5” MT19CP-8 Coincident Coaxial Driver from the SB Acoustics Satori Line

The new 7.5" coaxial driver from SB Acoustics' prestigious Satori line is built on a rather stylish aluminum-cast frame, totally open below the spider, with a cone featuring SB's proprietary Egyptian Papyrus material with a three-roll coated cloth-type surround, driven with a 1.52" diameter voice coil and neodymium magnet. The 1" tweeter is comprised of a coated cloth-type dome diaphragm, powered by a neodymium motor, which incorporates a resonant back chamber design.
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Test Bench: Purifi Audio PTT10.0X04-NAB-01 10” Midbass Woofer
by Vance Dickason

Test Bench: Purifi Audio PTT10.0X04-NAB-01 10” Midbass Woofer

The eagerly awaited Purifi Audio PTT10.0X04-NAB-01 10" Midbass Woofer is the sixth Purifi driver to be examined in Test Bench. This 4Ω woofer features extensive proprietary technology that includes the constant Sd surround, cone edge stiffening ring, and low magnetic hysteresis motor design. The PTT10.0X04-NAB-01 exhibits some very unique engineering that can be finally characterized.
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