KEF Ci4100QL In-Wall Loudspeaker


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Ci4100QL is a highly capable, high performance in-wall loudspeaker, designed, engineered and manufactured by critically acclaimed loudspeaker company KEF. This loudspeaker has been designed to match the performance of the company's well-renowned floorstanding models, while retaining a discrete and non-intrusive aesthetic. The nature of this in-wall loudspeaker means that integration with existing décor is not an issue.

While the in-wall nature of the speaker saves space and is harder to see that traditional speakers, the level of sound that this model is able to reproduce is anything but discrete. The Ci4100QL utilises KEF's UTB (ultra-thing-bBezel) design and patented 100mm Uni-Q driver array. This, in conjunction with a 19mm aluminium dome tweeter and three 100mm extended response bass drivers allow the model to reproduce a full and detailed sound, matching and even beating that of some flagship floorstanding models of lesser brands. 

Sold as a single unit.


Nominal Impedance 4Ω
Sensitivity (2.83V/ 1m) 89dB
Frequency response (±6dB)
Crossover frequency 2.2kHz
LF Drive Units
MF Drive Units
HF Drive Units 
3 x 100mm (4 in.)
100mm (4 in.)
19mm (0.75 in.) Uni-Q

(H x W x D)

490 x 128 x 81 mm
19.29 x 5.04 x 3.19 in.
Cut-out dimensions 476 x 114mm
(18.74 x 4.49 in.)
Net Weight 3 kg (6.61 lbs)
depth from surface
76mm (3.0 in.)

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Providing your item is in stock, the order is usually dispatched within 24 hours. Please remember that postage and packing is completely free for orders over £50*. Out of stock items will be dispatched as soon as they become available, out of stock items can take between 4 to 21 days for dispatch.

Deliveries usually take 1-3 working days. The majority of orders are sent via our couriers'; Interlink Express on a next-day-delivery service. Smaller, low value or light-weight items are normally posted using Royal Mail Recorded or Royal Mail Special Delivery.

Once your product has been dispatched, you will be notified via email and sent a unique consignment number, you can use this number at to check the status of your delivery. If you have provided a mobile telephone number, Interlink's Predict service will notify you by text (and email) of a one-hour delivery window. If the window they suggest is inconvenient, you can change the date of delivery to a later one via text or email.

*We ship free of charge to mainland UK addresses, excluding the Scottish Highlands or 'Out-Of-Reach' Scottish locations. Please consult the post-codes below to see if your location falls within this category. If you are still unsure, please contact us on 01432 354921. We also ship to Northern Ireland, Channel Islands, Scilly Isles, Scottish Isles and Scottish Highlands, however delivery to these locations will incur a charge and can only be sent via a 2-day service.

Shipping CostsMainland UK (Next-Day)Offshore/Out-of-reach (2-day)Northern Ireland, Channel Islands, Isle of Man, Scottish Islands, Scilly IslandsRepublic of Ireland (2-day)
Under £50 Orders £7.50 £12.50 £15.00
Over £50 Orders FREE £19.99 £29.99
Surcharge Orders £50.00 £69.99 £79.99
Saturday Delivery £12.99 N/A N/A
Sunday Delivery £12.99 N/A N/A
Saturday by 12 Delivery £35 N/A N/A


Post codes exempt from the free delivery service include:

Scottish Highlands Post Codes: AB30-38, AB41-42, AB44-56, FK17-99, G83, IV1-28, IV30-39, IV52-54, IV63, KW1-14, PA21-33, PA34-40, PH15-26, PH31-41, PH49-50
Islands Post Codes: HS1-9, IV40-51, IV55-56, KA27-28, KW15-17, PA20, PA41-49, PA60-78, PH42-44, ZE1-3
Northern Ireland: All BT postcodes
Channel Islands Post Codes: JE, GY
Scilly Isles Post Codes: TR21, TR22, TR23, TR24, TR25