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.

The Voice Coil July 2018 edition is now available and full of great content and insights, apart from the indispensable patent reviews and Test Bench reviews. This edition focuses on Bonding, Dispensing, Coating, and Related Aspects in Speaker Production, and features a great article by Mike Klasco on the topic, as well as an updated industry directory. James Croft reviews a patent for a “Self-bias Emitter Circuit,” awarded to Turtle Beach, while Vance Dickason looks at two interesting new high-frequency transducers, from Radian Audio Engineering, and Spanish OEM manufacturer Beyma.

For this month’s Test Bench article, I examined the 745NEOBe, a pro sound 1.4” beryllium compression driver from Radian Audio Engineering. Radian Audio was founded in 1988 by its president, Dr. Richard Kontrimas, however, Kontrimas has since retired and the company is under new ownership, based in Orange, CA. With more than two decades of success under its belt, Radian Audio is now entering its third decade as a pro sound manufacturer. This article was originally published in Voice Coil, October 2017.

Getting ready for another edition of the AES Convention in New York City, and many other October shows, this edition of Voice Coil is another one for the records, including an extensive directory of Amplifier and DSP Vendors, and a review of Bose's latest patent of a new bass reflex and tuned pipe enclosure. In Test Bench, Vance Dickason characterizes the 745NEOBe, a pro sound 1.4” beryllium compression driver from Radian Audio, and the updated CQQ76 ribbon tweeter from BoZhen New Audio Lab.

As Vance Dickason reminds us, November 2014 marks the beginning of Voice Coil’s 28th year as the leading information resource for the loudspeaker industry. Since the first issue in November 1987 Voice Coil stayed true to its original concept as a world-class clearing-house of information for loudspeaker engineers, manufacturers, marketing specialists, and OEM suppliers. The November 2014 edition is now available.