Revel Ultima 3D is standard kit in our top trim Lincoln Aviator Grand Touring, bragging 28 speakers along with 20 separate amplifier channels. Each door gets a woofer, mid-range speaker, and tweeter. There’s a dash-top speaker/tweeter combo, speakers in the roof, C-pillars, and an 8-inch woofer behind the third row. Not only do the Aviator’s laser-etched aluminum speaker grilles look cool, their pattern is designed to promote acoustical accuracy. Signal processing includes Harman’s QuantumLogic Surround along with Clari-Fi music restoration which rebuilds music details lost in digitally compresses music (read: mp3s and SiriusXM signals). Cadillac paired with legendary Austrian studio microphone and headphone maker AKG to create the audio experience for its all-new flagship SUV. AKG is not a name of which most people are aware, and this is the first time the 70-year-old company has done an automotive application. Caddy approached AKG three years ago, and the fruits of their labours result in this Studio Reference Surround 3D, with 36 speakers and 28 amplifier channels.