KEF Ci5160RL-THX In-Wall or Ceiling Speaker $3,500.00 KEF Ci5160RL-THX In-Wall or Ceiling Speaker. The KEF Ci5160-THX speaker (THX Ultra2 Certified) will rival some of KEF’s Floor standing Tower Speakers, and will generate a jaw-dropping listening experience. Like some of the most expensive speakers in the world, The Ci5160RL-THX is crafted from a massive aluminum baffle to eliminate vibration and is the perfect platform for the 160mm aluminum cone Uni-Q with tangerine waveguide, and four 160mm woofers. Capable of bi-wire and bi-amplifier connections the Ci5160RL-THX delivers on the performance promise of all KEF R Series speakers. Available in Silver-Aluminum Finish Only. Dimensions HxWxD: 42.13 x 9.06 x 4.16” Weights: 41.89 lbs Price: $3500 each.