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KEF Ci200QSb-THX In-Wall Subwoofer

Model #: Ci200QSb-THX
At a Glance
Certified to THX ULTRA2 and THX SELECT2 standards, 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.
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$99,999.00Save $NaN

Get to know this product.

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 Ci series in-wall or in-ceiling speakers. In Active mode, when 2 pair of the Ci200QSb-THX subwoofer are powered by the powerful 250Wx 2 KEF KASA500 System Amplifier the performance meets THX Select2 specification. When 4 pair of the Ci200QSb-THX are powered by 2 KEF KASA500 System Amplifiers the performance meets THX Ultra2 specification.

  • THX Certified Ultra2 / Select2
  • 200mm (8in.) woofer unit with extended bass response
  • Paintable Ultra-Thin Bezel (UTB) and magnetic grille to blend unobtrusively with décor
  • Fast, versatile installation on virtually any surface via dogleg
  • Can be used in passive mode with internal crossover or active mode with KEF’s KASA500 System Amplifier for THX certified performance
  • Sold in Pairs


  • Cut-Out: 9.37”W x 9.37”H
  • Mounting Depth from Surface: 4”
  • External: 10.75”W x 4.17”D x 10.75”H
Useful Documents


Crossover Type:100Hz
Sold As:Pair


Speaker Type:Subwoofer Speaker

Misc. Specs

Product Weight (lbs.)7.2800
Color Finish NameWhite
RMS Power Handling (Watts)150
Impedance6 ohms
Number of Speakers2
Depth (in.)4.17
Height (in.)10.75
Width (in.)10.75
Woofer Size8"
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