Motus Audio UH130PW1 Midbass Woofer

This month, the Test Bench samples came from a relatively new high-end home audio company. From high-end home audio OEM manufacturer Motus Audio, I received the UH130PW1, a 5.25” mid-bass driver, an impressive looking mid-bass transducer, with a similar feature set as several other European high-end mid-bass woofer brands. This article was originally published in Voice Coil, January 2016.

This Test Bench characterizes Scan-Speak's 10" aluminum cone subwoofer, the 26W/4558T00, a high-end home audio driver from the Danish brand's Discovery lineup. Scan-Speak obviously spent a lot of time designing the cone for this woofer, made with a thick black flat profile anodized aluminum, with an articulation that should add considerable stiffness. This article was originally published in Voice Coil, February 2011.

This Test Bench carachterizes Scan-Speak’s 1″ wide surround silk dome tweeter, the D2604/833000, a high-end home audio driver from their Discovery lineup. The D2604/833000 features a large surround 1″ diameter silk dome, a low 475Hz resonance, CRT shielding, a separate rear chamber, a ferrite magnet motor, an injection-molded faceplate with a five-point mounting configuration, voice coil wound with copper-clad aluminum wire, and gold-plated terminals. This article was originally published in Voice Coil, February 2011.

This Test Bench focuses on a new and extremely clever variable Bl 12″ diameter guitar speaker from Eminence — the 12″ Maverick, from the Eminence Patriot series, which uses their new FDM technology (Flux Density Modulation) to allow some really desirable distortion characteristics that have become the signature of blues and rock guitar playing. This article was originally published in Voice Coil, January 2011.

In this edition of Test Bench - already from Voice Coil’s archives, originally published in September 2010 - Vance Dickason measures the WF120BD04 midbass woofer from Wavecor, part of a complete range of 4¾” transducers, including the WF120BD03 (4 ohm version), which he found to be well-crafted drivers. Both were designed as high performance bass and midrange units for very compact monitors and high-end hi-fi speakers and feature a Balanced Drive motor proprietary structure.

Eminence sent a 6.5″ driver from their lightweight Professional Neodymium Series, the Alphalite 6A, which, along with the Kappalite and Deltalite series, makes up the neo woofer/midrange offering from Eminence. The Alphalite 6A is described as a lightweight pro audio mid/bass driver, designed for sealed, vented, or infinite baffle applications. This article was originally published in Voice Coil, June 2010.

This Test Bench article focuses on a product from Exodus Audio, a high excursion 6.5″ aluminum cone midwoofer, the W06-017R, which was known in retail under the name “Anarchy.” This article was published originally in Voice Coil March 2010 and the company’s website, DIY Cable and Exodus Audio, from Port Angeles, WA, sadly closed it’s doors in June 2011 (after 10 years and 6 months in activity). We thought we should make this review available to all, maybe as a way to inspire other transducer engineers.

Eighteen Sound sent us an unusual driver for this Test Bench, because it is specifically intended for use with the new generation of Class-D digital amplifiers that can drive extremely low impedance loads. While Eighteen Sound has several models in this configuration, this month we are testing the 18” model, the 18iD, developed in accordance with Powersoft Audio’s IPAL standards. This article was originally published in Voice Coil, December 2015.

The transducer I received for this month’s Test Bench is the CF0617M, a new high power handling 6.5” midrange, from Celestion. The CF0617M is one of my favorite formats in a pro sound mid. Features include a four-spoke cast aluminum frame, a light-weight curved profile uncoated Kevlar loaded paper cone, a 1.75” diameter voice coil and a 120 mm × 15 mm ferrite magnet. This article was originally published in Voice Coil, December 2015.

Another edition of great interest to the loudspeaker engineering community, the October 2016 issue of Voice Coil highlights forthcoming speaker industry events and features an update on Integrated Amplifier/Signal Processing Speaker Vendors, including an indispensable Directory update. In this month’s Acoustic Patents, we look at two recent and promising - or simply intriguing - inventions, while Vance Dickason returns to Wavecor’s subwoofer range in this month’s Test Bench, which positively impressed him in past reviews. Now available.