Devialet is a French audio technology company that produces a line of speakers (Phantom) and amplifiers (Expert). It was founded in 2007 in Paris.
Devialet initially got its start in 2004 when co-founder and engineer, Pierre-Emmanuel Calmel, invented his Analog Digital Hybrid (ADH) technology (which is now in every Devialet product). Calmel offered the technology to his then-employer Nortel, but, when they declined, he quit his job to focus on making a working prototype. Three years later he had developed an amplifier prototype using the technology. Calmel was later joined by Quentin Sannié, Emmanuel Nardin when he launched Devialet in Paris in 2007.
The Devialet produces a range of wireless speakers called "Phantom" along with a range of amplifiers known as "Expert Pro." The Phantom line is separated into two ranges, Phantom Premier (with 3 models) and Phantom Reactor (with 3 models). All current Devialet devices are equipped with a variety of technologies, most notably, Analog Digital Hybrid (ADH). ADH combines elements of analog amps (Class-A) and digital amps (Class-D) allowing for larger wattage and decibel peaks. Heart Bass Implosion (HBI) is a technology that provides broader coverage of low-frequency sounds and mimics the properties of a subwoofer. Speaker Active Matching (SAM) is a signal processing mechanism that analyzes and adjusts sounds in real time to "reproduce the exact acoustic pressure recorded by the microphone." The Active Co-Spherical Engine (ACE) refers to the spherical shape of some Devialet devices (namely, the Phantom speakers) is an acoustic architecture designed to deliver sound in every direction.
They collaborated with Free to equip their TV set-top box with Devialet speakers. They also collaborated with Sky to make a soundbox.