B&C Speakers 6MBX44 MBX Mid-Bass Woofer

This edition of Voice Coil Test Bench characterizes the 6.5” 6MBX44 driver, from Italian pro sound OEM, B&C Speakers. The new MBX series of pro sound mid-bass woofers is especially well suited for small two-way loudspeaker applications. Features for the 6MBX44 include a proprietary four twin spoke cast-aluminum frame, enhanced voice coil cooling, curvilinear waterproof paper cone and inverted paper dust cap, and a neodymium ring magnet. This article was published originally in Voice Coil, January 2017.

This month’s Test Bench is part of B&C Speakers' MBX series of mid-bass woofers, the 8MBX51. The MBX series offer acoustic designers a new range of high efficiency, wide bandwidth alternatives that were not previously available from B&C Speakers, and are especially well suited for two-way loudspeaker applications. Features for the 8MBX51 are fairly impressive. Cosmetically speaking, this is also a good looking driver. This article was originally published in Voice Coil, November 2016.

This edition of Test Bench characterizes Dayton Audio’s new 6” diameter ultra-low-profile midwoofer, the LW150-4. This is a new ultrathin profile cone 6” diameter midbass driver featuring a six-spoke cast-aluminum frame with a 1.5” total depth. The depth reduction is significant as the motor assembly is housed inside the frame and uses a neodymium slug and a 1.5” diameter return cup that incorporates a T-pole. This article was originally published in Voice Coil, March 2016.

In this Test Bench, Voice Coil characterizes Dayton Audio’s new 4.5” diameter carbon fiber cone midwoofer, the CF120-4. This new midbass driver from Dayton Audio features a pin-cushion style four-spoke cast-aluminum frame. For the cone assembly, Dayton Audio chose a rather stiff curved profile woven carbon fiber cone with a 1.13” diameter convex woven carbon fiber dust cap. This article was originally published in Voice Coil, February 2016.

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.

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.

Voice Coil December 2016 features a Spotlight article on Vesper’s new and revolutionary proprietary MEMS piezoelectric transducer architecture, a comprehensive Directory of Measurement Microphones and related solutions, and the always indispensable Acoustic Patents article, which discusses an interesting new subwoofer design. Vance Dickason characterizes a new compression driver from Eighteen Sound and a mid-bass woofer from Dayton Audio and remembers the notable life and work of industry pioneer Leo Beranek (September 15, 1914 – October 16, 2016). Now available online!

B&C Speakers is now shipping its new MBX Series. The new MBX series of mid-bass woofers is available in 6.5-inch, 8-inch, and 10-inch frame sizes. Designed as a solution for two way systems and multi-driver applications, the new series offer a balance between low and mid frequency reproduction, with high sensitivity for reduced amplifier current requirements. All woofers feature a neodymium ring magnet, copper-clad aluminum voice coil wire, ventilated voice coil gap, weatherproof hydrophobic paper cones, and an aluminum demodulation ring.

This month’s Test Bench is dedicated to a new woofer from Motus, a fairly new company in the esoteric end of the home audio business. The transducer under test is the Motus UH205PW1, an 8” mid-bass driver with a really nicely configured six-spoke cast-aluminum frame, FEA optimized motor design and a nice overall physical appearance. This article was originally published in Voice Coil, November 2015.