Test Bench: TPL75 Compact Pro Sound AMT from Acustica Beyma

The TPL75 is one of the Air Motion Transformers (AMT, aka Air Velocity Transformer) that Acustica Beyma has developed for pro sound applications. Part of the success of Beyma’s AMTs for pro sound comes from its proprietary X-Bow technology, which opens as much as possible the mechanical constraint in the diaphragm, allowing it to manage higher temperatures, increasing the limit of the power the diaphragm can handle. This article was originally published in Voice Coil, August 2018.

In this edition of Test Bench, Vance Dickason characterized a different high-frequency transducer: the TPL200/H, a horn-loaded pro sound AMT from the Valencia, Spain, company Acustica Beyma. The TPL200/H is one of the Air Motion Transformers (AMT, aka AVT Air Velocity Transformer) that Beyma has developed for pro sound applications and is a Kapton horn-loaded version of the highest power handling AMT in their AMT line, rated at 120 W AES (24 W program), with a sensitivity of 104 dB 1 W/1 m. This article was originally published in Voice Coil, July 2018.

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.

PreSonus has announced the new R65 and R80 Active AMT Monitors, featuring a custom Air Motion Transformer (AMT) tweeter, driven by a 50W RMS Class D amplifier, and 6.5/8-inch woofers driven by 100W RMS Class D amplifiers and featuring Acoustic Tuning controls. PreSonus also introduced recently the new Eris E44 and E66 two-way active MTM (Midwoofer-Tweeter-Midwoofer) studio monitors, providing a wider stereo field.