KEF Ci3160RLb THX Extreme In Wall Speaker (Each) length 0 5m and DSD high resolution audio formats FURN OFF filetype stor and DSD high resolution audio formats The tweeters twist and pivot to optimize performance and a high frequency equalization switch allows precise matching to any environment Each KASA500 can power up to two of the Ci3160RLb THX subwoofers for even the most demanding theatre installations the formidable Ci R Series Ci3160RLb THX in wall subwoofer has the deep bass and theatre thumping output capabilities of a traditional KEF subwoofer coupled with the ability to deliver all the drama and emotional intensity of full theatre sound quality