THX® Certified Select. Cinematic Accuracy. Architectural Elegance.

The KEF Ci4100QL‑THX is a high‑performance in‑wall speaker engineered to deliver true cinematic sound while blending seamlessly into modern interiors. As a THX® Certified Select model, it meets the rigorous standards required to reproduce the exact tonal balance, dynamics, and clarity intended by filmmakers. Whether used in a 2.1, 5.1, or 7.1 home theater system, the Ci4100QL‑THX brings studio‑grade precision directly into your living space.

At its core is KEF’s patented Uni‑Q driver array, which positions the tweeter at the acoustic center of the midrange cone. This allows the speaker to act as a single point source, delivering exceptionally wide and even sound dispersion. Combined with KEF’s Ultra‑Thin Bezel (UTB) design, the Ci4100QL‑THX offers both acoustic excellence and discreet architectural integration.

Engineered with the design characteristics of professional studio monitors, the Ci4100QL‑THX delivers impactful action sequences, natural dialogue, and immersive surround effects. It provides the high output, controlled directivity, and imaging accuracy of a traditional box speaker — but in a form factor that blends harmoniously into any room.

A perfect choice for dedicated home theaters, media rooms, and high‑end residential installations, the Ci4100QL‑THX offers the best of both worlds: THX‑certified performance and architectural elegance.