The KEF Ci5120QLM-THX is a 3-way in-wall architectural speaker for home cinema in larger rooms. It pairs a 12th generation 100mm Uni-Q driver array, whose 19mm vented aluminium tweeter uses Metamaterial Absorption Technology (MAT), with four 120mm (4.75″) bass drivers for deeper bass extension than the two-woofer Ci3120QLM-THX, and is THX Certified Ultra and IP64 rated.
12th generation Uni-Q driver array for wide, even dispersion
Metamaterial Absorption Technology (MAT) on the vented aluminium dome tweeter
Four 120mm (4.75″) long-throw bass drivers
3-way design with optimised crossovers at 440Hz and 2.75kHz
THX Certified Ultra for large home theatres and living rooms
Paintable magnetic metal grille and Ultra-Thin Bezel (UTB)
IP64 rated
This is a 4Ω speaker – check your amplifier is rated for 4Ω loads.
| Model | Ci5120QLM-THX |
| Type | 3-way in-wall speaker |
| Drive units | LF: 4 x 120mm (4.75″); MF: 100mm (4″) Uni-Q; HF: 19mm (0.75″) vented aluminium dome with MAT |
| Frequency response (±6dB, open-backed) | 45Hz – 20kHz |
| Frequency range | 38Hz – 20kHz |
| Sensitivity | 89dB |
| Nominal impedance | 4Ω |
| Nominal coverage | 150° |
| Max SPL (1m) | 105dB |
| Crossover frequencies | 440Hz, 2.75kHz |
| Recommended amplifier power | 25 – 250W |
| Recommended high-pass filter | 35Hz – 100Hz |
| Certification | IP64; THX Certified Ultra |
| Wall thickness | 6mm min / 36mm max |
| Rear volume | 70L ideal / 35L minimum |
| Cut-out (H x W) | 795 x 163mm |
| Mounting depth from surface | 90mm |
| External dimensions (H x W x D) | 818 x 186 x 96mm |
| In the box | Speaker x1, metal grille x1, cut-out template x1, warranty booklet, manual |
| Net weight | 9.7kg |





