KEF Ci200QSb-THX 200mm THX Certified Ulta In-Wall Subwoofer (Pair)

THX Certified Ultra 200mm SubwooferTHX Certified to the level of Ultra and Select, the formidable Ci200QSb-THX in-wall subwoofer delivers deep bass and theatre thumping output capabilities, matched to the uncanny ability to deliver all the drama and emotional intensity of full theatre sound quality. THX Certified to the level of Ultra and Select, the formidable Ci200QSb-THX in-wall subwoofer delivers deep bass and theatre thumping output capabilities, matched to the uncanny ability to deliver all the drama and emotional intensity of full theatre sound quality. With a powerful high-output 200mm (8in.) sub-bass driver, the Ci200QSb-THX can be used in passive mode to supplement the LF output of KEF’s in-wall or in-ceiling speakers. In Active mode, when 2 pairs of the Ci200QSb-THX subwoofer are powered by 2 KEF KASA500 System Amplifiers the performance meets THX Certified Select specification. When 4 pairs of the Ci200QSb-THX are powered by 2 KEF KASA500 System Amplifiers the performance m