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Ci4100QL-THXFeaturing KEF’s sophisticated ’sit anywhere’ Uni-Q driver array, which places the tweeter in the acoustic centre of the bass/midrange cone, this allows both the tweeter and woofer to act as a single point source that disperses the sound widely and evenly throughout the room. Together with the discreet Ultra Thin Bezel (UTB) design, offering the slimmest possible visible rim around the speaker, the Ci Q Series range gives you tremendous freedom to position the speakers where you please.
THX certified in-wall speakers deliver the appropriate frequency response and high output and imaging quality of a traditional box speaker. This provides the best of both worlds - THX surround sound performance from components that blend harmoniously with any room decor.
|Nominal Impedance||4 Ω|
|Sensitivity||89dB (2.83V/ 1m)|
|Frequency Response||55Hz - 28kHz (±6dB) open backed|
|Drive Units||LF: 3 x 100mm (4 in.)
MF: 100mm (4 in.)
HF: 19mm (0.75 in.) Uni-Q
|Amplifier requirements||10 - 150W|
|Product external dimensions||H x W x D : 490 x 128 x 81 mm (19.29 x 5.04 x 3.19 in.)|
|Cut-out dimensions||H x W : 476 x 114mm (18.74 x 4.49 in.)|
|Mounting depth from surface||76mm (3.0 in.)|
|Net Weight||3 kg (6.61 lbs)|
|Document Download||Ci4100QL-THX Information Sheet
Ci Series Pamphlet
Ci Series Specification Sheet
Ci Series Minimum Cabinet Volume Chart
EASE GLL Data
|Remarks||KEF reserves the right, in line with continuing research and development, to amend or change specifications. E&OE. THX, the THX logo, and SELECT2 are trademarks of THX Ltd. THX and the THX logo are registered in the U.S. and other jurisdictions. All rights reserved.|
The THX StoryBorn out of the Star Wars legacy and tied to one of the world's most acclaimed filmmakers, no other brand resonates with consumers as deeply, and with greater trust than THX.
One week after "Star Wars Episode V: The Empire Strikes Back" debuted in theatres, George Lucas hired audio scientist, Tomlinson Holman, to design the audio mixing facilities at Lucas' Skywalker Ranch in Northern California. To begin the project, Lucas gave Holman one year to examine film audio throughout the entire production chain - from the set to the theatre, and everything in between. Holman's goal was to find a way to improve cinematic sound production and create specifications to design the state-of-the-art audio mixing rooms that would eventually house Skywalker Sound.
During that year, Holman was shocked to discover the state of most commercial cinemas. While Dolby Laboratories had made significant contributions to how sound was recorded and played back on film, no one had control over what happened on the production set or in the theatre itself. Holman found that most commercial theatres had not seen significant technology improvements since World War II. Viewing angles were poor, inadequate light levels distorted images, and the quality of sound systems and auditorium acoustics made it impossible to hear the dialogue, let alone experience the filmmaker's vision.
Bringing the THX Experience to MoviegoersAfter the Skywalker Sound audio facilities and Stag Theatre were completed, Lucasfilm began receiving requests from visiting commercial theatre owners and Hollywood studio executives to incorporate the Ranch's performance standards into their cinema auditoriums and aging mixing rooms. Realizing that this could change the way moviegoers experienced feature films, Lucas and the soon-to-be THX team designed a certification program to go beyond the walls of Skywalker Ranch. Thus, THX was born, and made available to movie audiences to coincide with the release of Lucas' next film, "Star Wars Episode VI: Return of the Jedi" in 1983.
The Process of THX Product CertificationThe THX testing process usually begins early in product development. Manufacturers ship samples to the THX Testing Lab in Northern California where a team of expert technicians carefully analyzes each sample and produces reports on their findings. Big reports! They cover hundreds of data points and virtually every aspect of the product's operational performance.
These findings are then sent to the manufacturer with suggestions for fixing any problems that could prevent certification. In many cases, THX requires the manufacturer to adjust the product's design or firmware and integrate THX playback features to improve performance and meet the THX spec. Further testing, modifications, tweaks and upgrades are done, and the manufacturer sends back the product for final evaluation.
With all of this testing from THX, the consumer is assured that the speaker system they are purchasing meets the highest standards for quality and compatibility right out of the box.
THX Audio Certification Categories
THX has multiple certification categories based on the room size in which the equipment will be installed. This ensures a THX home theatre system will play loud & clear without audible distortion at THX reference levels in specific room sizes and at specific viewing distances from the screen. This also certifies that the subwoofers will properly pressurize the theatre, so that even the most demanding of movie sound effects are heard and felt with visceral clarity. Of all the THX certification standards Ultra2 is the most demanding as Ultra2 systems are designed for room larger than 85 cubic meters (3000 cubic feet) with viewing distances from the screen greater than 4 meters (12 Feet).
1. KEF Speaker Placement ToolCreated by KEF UK engineering, the "KEF Speaker Placement Tool" is a software program* designed to assist you in the placement and layout of KEF Ci loudspeakers. Able to accommodate both 70V/100V and stereo music systems the software will graphically show room sound coverage, show speaker layout, and to provide wiring diagrams. For your convenience room layouts can be saved, printed, exported, and retrieved for future reference.
Download Ci Software
2. KASA500 Software Update ToolKASA500 is a powerful Class-D Dual 250WPC amplifier. This DSP controlled system amplifier is optimized to deliver thunderous bass from KEF Ci subwoofers. With both line and speaker level inputs, and DSP configurable pass-through with optional high pass filters – the KASA500 is versatile and can be deployed in limitless system configurations. To allow for future flexibility KEF engineers may update the KASA500 DSP firmware to optimize performance with additional KEF speakers. The KASA500 Programmer* is a proprietary tool for updating the KASA500 firmware. NOTE: KASA500 software requires a "USB Type A Male to USB Type A Male cable" for connection between your computer and the KASA500.
Download KASA500 Programmer
Download KASA500 Firmware Rev. 10.04 - The latest KASA500 Firmware provides settings for KEF Ci subwoofer models Ci3160RLb-THX, Ci200QSb-THX, Ci200TRb and Ci4100QLb with THX certified performance (if applicable) in both mono and stereo mode.
Download KASA500 EQ setting dip switch chart
Download KASA500 user manual - KASA500 manual includes installation diagrams for both home theater and music sub/satellite installations.