Note that this is a discontinued product. You may want to visit the brand's page here to browse their newer products.
What reviewers think
Bloggers and YouTubers have tried this product—so we've summarized their strongest opinions below. Links to full reviews follow.
All
Ci5160RLM-THX
reviews

Manufacturer details
- Series: R Series
- Nominal Impedance: 4Ω
- Sensitivity (2.83V/1m): 89dB
- Frequency Response (±6 dB) open-backed: 40 - 28kHz
- Frequency Range (-10 dB): 32 - 45kHz
- Nominal Coverage (degrees): 150°
- Crossover Frequency: 640Hz, 2.6kHz
- Drive Units: LF: 4 x 160mm (6.5in.), MF: 160mm (6.5in.) Uni-Q HF: 25mm (1in.) vented aluminium dome with Metamaterial Absorption Technology
- Recommended Amplifier Power: 50 - 350 W
- Recommended High-pass Filter (Hz): 35Hz - 80Hz
- Product External Dimensions (H X W X D): 1070 x 230 x 105.7mm (42.13 x 9.06 x 4.16in.)
- Cut-out Dimensions (H X W): 1052 x 209mm (41.42 x 8.23in.)
- Net Weight: 18.7kg (41.1lbs.)
- Mounting Depth From Surface: 99mm (3.9in.)
- Optional Rough In Frame: RIF5160L
- Ideal Rear Volume (L): 90
- Minimum Rear Volume (L): 40
- Max SPL (dB): 110dB
- Certification: THX ® Certified Ultra
- Wall Thickness (Maximum): 40mm (1.58in.)
- Wall Thickness (Minimum): 6mm (0.24in.)
Brand highlights
Taking a step back to look at reviewers' thoughts of the brand's entire lineup—not just this product—what stands out most is the following:
- KEF's designs prioritize a "Single Apparent Source" through coaxial driver technology, aiming for a coherent soundstage where frequencies appear to originate from a single point, enhancing realism and spatial accuracy.
- The brand incorporates "Metamaterial Absorption Technology (MAT)" into its drivers, utilizing a maze-like structure to absorb unwanted sound waves from the rear of the driver, resulting in cleaner and more defined output.
- They offer a wide range of streaming and connectivity options, with their powered loudspeakers responding to the proprietary KEF Connect app, which delivers multiple streaming services and facilitates setup and customization.
- KEF frequently collaborates with renowned industrial designers to create visually striking products that seamlessly blend into modern living spaces, balancing aesthetic appeal with acoustic performance.
Select products
T Series
- Positioning: The ultra-slim speaker line, designed to complement modern flat-screen TVs with a minimal footprint.
- Description: While delivering a sleek aesthetic, the flat diaphragm driver maintains rigidity and minimizes resonance, providing clean and accurate sound. However, compared to other KEF lines like the Q or R Series, it may offer less depth in bass response due to its slim design.
Q Series
- Positioning: The entry-level range offers versatile speakers suitable for both stereo and home theater setups.
- Description: Features Metamaterial Absorption Technology (MAT) and the 12th generation Uni-Q driver array, delivering detailed and natural sound. While it provides excellent value, it lacks some of the advanced damping and driver technologies found in the higher-end R and Reference Series, which offer more refined sound reproduction.
R Series
- Positioning: Bridges the gap between the entry-level Q Series and the high-end Reference Series, incorporating technologies from the latter to enhance performance.
- Description: Equipped with Metamaterial Absorption Technology (MAT) and the 12th generation Uni-Q driver array, delivers precise and immersive sound. Unlike the Q Series, it includes Shadow Flare technology to reduce cabinet diffraction, resulting in clearer high frequencies.
The Reference
- Positioning: As KEF's high-end line, sets the benchmark for audiophile-grade sound reproduction.
- Description: Incorporating Metamaterial Absorption Technology (MAT) and a 12th generation Uni-Q driver array, offers exceptional clarity and detail. It also features advanced cabinet construction and flexible port technology for cleaner bass compared to the R Series. However, it doesn't achieve the Single Apparent Source configuration found in the Blade Series, which provides even more precise imaging.
Blade Series
- Positioning: Represents KEF's innovative approach to speaker design, featuring the world's first Single Apparent Source loudspeakers.
- Description: With Metamaterial Absorption Technology (MAT) and the 12th generation Uni-Q driver array, delivers coherent and precise sound. Its unique cabinet design minimizes resonances and diffraction, surpassing the traditional enclosures of The Reference Series.
MUON
- Positioning: Stands as KEF's flagship speaker, combining cutting-edge acoustic engineering with avant-garde industrial design.
- Description: Crafted from super-formed aluminum, the rigid structure minimizes vibrations, delivering ultra-wide bandwidth and immersive sound. While it shares the Uni-Q driver array with other KEF models, its exclusive design and limited production make it a collector's item.
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Used
KEF
What if you spend more?
Product Strengths
- Immersive sound quality
- Can handle a lot of dynamics
- Impressive shallow installation depth (approximately 10cm) despite its size
- Solid construction using high-quality aluminum, steel, and MDF to counteract resonances
- Easy to install with clamps and a supplied Allen key
Product Considerations
- Standard white covers may need repainting to match specific wall colors
- Some users may desire a little deeper bass for movies
Takeaway: The DALI Phantom 280S offers immersive sound and dynamic performance while being relatively easy to install within a wall. Its solid construction and good finish make it a worthwhile consideration for a home theater or high-end audio setup.
Video review
Our take on the brand
Product Strengths
- True audiophile performance with pinpoint imaging and a huge soundstage from an in-wall footprint rivaling free standing speakers
- Reference-grade materials such as inverted beryllium dome tweeter and W Cone sandwich drivers
- Utopia models feature a slick, modular, expandable design to fit a variety of installations
- LFE signals can be sent to the IWLCR Utopia when used in conjunction with the IWSUB-Utopia
Product Considerations
- Dog ears are finicky and may have issues when installing multiple sheetrock layers near max thickness rating
- Connection plates adhering to the joints and ends of the grilles don't always sit completely flat
- An equally capable processor with advanced EQ and amplifier stable into low impedance loads is required to maximize performance potential
- IWSUB Utopia models lack a vibration damping suspension system
Takeaway: The Focal Utopia offers audiophile-grade sound with flexible installation, making it a great choice for those who want top-notch performance without taking up floor space. With its advanced features and high-quality components, it delivers an immersive audio experience.
Video review
Our take on the brand
FLAG COLLECTION FLAG M FLAG M speakers guarantee excellent acoustic performance in medium-large rooms. The isodynamic technology allows to obtain a very uniform sound diffusion in the listening room. In the active digital version, equipped with remote control and digital inputs, the speakers become a complete audio system and you just need to connect a music source to enjoy your music.
Product Strengths
- Very slim, making them convenient to place in a room
- With no acoustic enclosure, they are free from colouration caused by internal resonances
- High and mid frequencies are clean, detailed, yet not fatiguing
- They can handle a variety of music genres, including Western Classical, Modern Pop, Hard Rock, Jazz, and Vocal based Music
- They create a large picturesque sound stage with placement of musicians across the stage
Product Considerations
- The aesthetic may not be for everyone
- Care is required when handling the speakers, especially with regard to children and animals
- The lower frequencies may take some time getting adjusted to, compared to the coloration of cabinet speakers
- The instruction manual is not so helpful, due to literal translation
Comparisons (according to reviewers)
- Vs Traditional Box Speakers–the Flag Ms offer a non-traditional approach to high-end quality listening
- Vs Traditional Box Speakers–the Flag Ms at the price point may be a worthy option when considering traditional box speaker competition
Takeaway: The Fonica International Flag M loudspeakers offer a unique listening experience with a sleek design and impressive soundstage. For those looking for a different approach to high-end audio, the Flag Ms are worth a listen.
Video review
Our take on the brand
Product Strengths
- Huge soundstage that expands beyond the confines of the room
- Incredible flexibility regarding placement and orientation, including in-wall, on-wall, and floor-standing options
- Speakers reveal a level of detail that few other systems can match
- THX Ultra certified and built to achieve true cinema reference volume levels
Product Considerations
- System should be installed by a professional
- The HFT drivers that make the sound so revealing could appear a little bright if not correctly tuned
Comparisons (according to reviewers)
- Monitor Audio Cinergy comes dangerously close to dethroning Perlisten in terms of movie sound
Takeaway: The Cinergy series is a fantastic option for home cinema fans, giving the best possible sound quality with a design tailored to home theater needs. A well-planned and executed Cinergy system can rival many commercial cinemas, offering a truly immersive sound experience.
Video review
Our take on the brand
What competes at this price?
Our Summary
Product Strengths
- Tonally rich and natural sounding
- Amazing detail that rivals the best electrostatics in terms of the pure level of detail and resolution
- They create an incredibly large, deep soundstage that will fill the room and place within that soundstage images as clear and precise as any speaker
- They handle pretty much every other aspect of what a speaker should do in an exemplary fashion
- Very easy to drive
Product Considerations
- These proved to be the most time consuming speakers to position that one has ever had in one's rooms
- Toe-in angle was critical, distance from the wall behind them was super critical, and all totally room dependent
- These are very directional speakers
- The bass response has to be looked at in conjunction with the room one is using them in
- They also require a relatively long 100 hour "break-in" period before they really start to loosen up a little and really shine
Comparisons (according to reviewers)
- Vs Tekton Lore, they do everything better than the Lores
Takeaway: The Double Impact is a stunning achievement in speaker design that offers an immersive and detailed listening experience. If one appreciates natural sound, exceptional detail, and a wide soundstage, these speakers are definitely worth considering for an audio setup.
Video review
Our take on the brand
Our Summary
Product Strengths
- THX Certified Dominus means it is optimized for room volumes of up to 6,500 cubic feet
- Can be used as a left, center, or right speaker and is the most powerful reference loudspeaker produced to date by M&K Sound
- Can be mounted either vertically or horizontally as a center channel
- Designed for use in high-end home theaters or hifi systems, it boasts an 80 Hz – 20 kHz (+/-1.5 dB) frequency response and a maximum SPL of greater than 117 dB
- Combines a high-performance one-inch soft dome tweeter with a precision-crafted aluminum waveguide to ensure accurate and focused vertical and horizontal dispersion
Product Considerations
- Should ideally be paired with one or more subwoofers, such as M&K Sound's THX Certified Dominus X15+ subwoofer
- Requires an amplifier with 100-500 watts of power
Takeaway: The IW500 is designed for large home theater installations, bringing sonic precision, neutrality, and articulation. Its THX Dominus certification ensures high performance and makes it a great choice for those looking for unrivaled audio in large environments.
Video review
Our take on the brand
Our Summary
Product Strengths
- Truly outstanding sound quality, delivering a near-electrostatic, audiophile listening experience in a disappearing, in-wall package
- Uses planar magnetic thin-film drivers (PMD) which can be highly detailed with excellent transient response
- PMDs are quite reliable because the spread-out "voice grid" is great at dissipating heat
- PMDs are super-easy for an amplifier to drive, as they are "an almost perfectly resistive load"
Product Considerations
- Horizontal center channel use of the Insight P4i requires stud modifications due to its size
Comparisons (according to reviewers)
- The Insight series squeezes most of the sound quality of the Wisdom Audio Sage Series into a less imposing, less costly package
Takeaway: The Wisdom Audio Insight P4i speakers provide excellent sound quality in an in-wall design, and are a great way to get high-end audio without large, free-standing speakers. They could be worth buying for those who want the best possible sound without compromising on interior design.
Video review
Our take on the brand
Our Summary
Product Strengths
- Delivers full, rich, and detailed sound with a hybrid tweeter module, an 8" wood fiber driver, and a 10" passive carbon fiber radiator
- Offers a significant level of adjustability and customization to suit individual audio preferences and spatial requirements, and can be installed vertically or horizontally
- Features a slim design and dogleg mounting system for easy installation on any standard wall
- Meticulously designed and crafted with high-quality materials and rigorous testing processes
Product Considerations
- Its high price point might make it less accessible for some customers
- To achieve optimal sound, the speaker should be installed with the tweeter at ear height, which may require additional consideration during installation
- The manufacturing origin of the speaker is not mentioned
Takeaway: The DALI Phantom S-180 is an excellent in-wall speaker that provides great sound and can be adjusted to fit individual needs. It's a worthwhile investment for a top-notch audio experience.
Video review
Our take on the brand
Our Summary
Product Strengths
- Delivers high-quality audiophile sound.
- Runs cleanly even at extremely high volumes.
- Treble dispersion creates a surprisingly wide sweet spot.
- Provides excellent precision in sound location, even when placed against a wall.
- First class clarity
Product Considerations
- Bass extension is fairly limited without a subwoofer
- Mounting depth is 104mm
- High frequency dispersion can be problematic if used horizontally without rotating the tweeter module
Takeaway: The Dali Phantom S-80 is a superb installation loudspeaker that delivers high-quality sound and runs cleanly at high volumes, perfect for someone looking for great audio in a discreet package. Its clarity and precision make it a worthwhile addition to any audio setup.
Video review
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