PMC Speakers QB1/QB1 XBD April 18, 2020 Matej Isak This should put a smile on the face of PMC Speakers’ fans. The QB1/QB1 XBD – 17,000w of pure listening pleasure. Tech includes: ATL, Laminair Air flow tech, PMC 10″ Piston, PMC 75mm Mid, PMC 37mm Soft dome HF, PMC Active Electronics and more…