Martin Logan EFX Electrostatic on Wall Speakers Black. Free up precious floorspace by mounting EFX to your wall with the included wall brackets. The EFX is also the ultimate high-performance home theater surround speaker and complements MartinLogan's entire line of electrostatic loudspeakers.
The clarity of each note is ensured by the highest reproduction accuracy for the original audio source, natural and true. “tre” is the sum of three Es: Electrostatic, Enjoyment and Everywhere. Now, with the world’s first portable Bluetooth® speaker with Electrostatic Diaphragm Technology, the BenQ treVolo enables astonishing clarity and absolute precision for your favorite vocal and acoustic music.