Krishna Audio Visual

Surat, Gujarat

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Book Shelf Speaker

Our product range includes a wide range of LSX Wireless Speaker, R3 Speaker, LS50 Speaker, Reference 1 Home Theater Speaker and LS50 Wireless The Biggest Small Music System.

LSX Wireless Speaker
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LSX Wireless Speaker

Rs 1.29 Lakhs / PieceGet Latest Price

Product Brochure

Weight3.6kg (7.9lbs)
Amplifier OutputSubwoofer output
Frequency Response54Hz - 28kHz
Drive UnitsHF 19mm
Power Input100 - 240VAC 50/60Hz
Amplifier Output PowerLF 70W HF 30W
Max SPL102dB
Dimension240 x 155 x 180mm
Master Speaker2.4GHz/5GHz Dual-band Wi-Fi network
Wi-Fi Network StandardIEEE 802.11a/b/g/n
Bluetooth range10 m
Bluetooth memory8 Devices


Rediscover stereo. Rediscover music.

KEF-LSX is the sound system for how we listen to music now: a true two-box wireless music system engineered to deliver high resolution audio with breath-taking clarity from elegantly compact speakers. LSX uses advanced wireless technology to retain the decades old audio principle that two speakers are better than one. LSX gives music space to breathe in glorious, full-bodied, wide bandwidth stereo.

Half a century of innovation

Since 1961, KEF has been a key driver of innovation in the audio world. Its unerring desire for improvement continues to lead to cutting-edge developments such as the Uni-Q® driver array. This relentless drive for development saw the 2011 launch of the incredibly successful LS50 loudspeaker, which was complemented by the exceptional LS50 Wireless. KEF-LSX expands upon this legacy, showing that even compact loudspeakers can deliver detailed, realistic sound.

Going truly wireless

KEF-LSX is completely wireless, both from the source and between the loudspeakers thanks to KEF’s proprietary wireless technology. For Apple® customers, LSX features Apple AirPlay® 2 (available in early 2019) which allow it to seamlessly and wirelessly operate with Mac®, Phone®, iPad® and Apple TV® products. Apple AirPlay 2 also enables the use of multiple LSX in different rooms and integrates with Siri®. Wireless connections provide access all the music on earth, with integrated access to Spotify® Connect (available in November 2018) and TIDAL® using 2.4GHz/5GHz dual band wi-fi connectivity. For any other mobile music source, LSX also features Bluetooth™ 4.2 with the high quality aptX™ codec from Qualcomm®.

Perfect for TV

KEF-LSX contains the optical TOSLINK connector found on most flat-screen TV’s. Combined with its two-box form factor, LSX is an ideal TV solution and will render TV sound with all of the atmosphere and clarity required to make a truly transformative experience.

The technology behind LSX

KEF-LSX is the beneficiary of over five decades of KEF’s acoustic know-how. This includes unique technologies such as the Uni-Q driver array, which has been continually refined and improved for three decades. Here it works in harmony with KEF’s highly advanced Music Integrity Engine™, a cutting-edge collection of bespoke Digital Signal Processing algorithms that help these compact loudspeakers deliver transparent bass with great extension, as well as providing phase correction and distortion reduction. The result: perfectly accurate sound across a wider ‘sweet spot’.

Power and flexibility

KEF-LSX sports four Class-D amplifiers, one for each of the drive units, alongside dedicated DACs, providing high-end digital signal path of up to 96kHz/24bit, using the optional wired connection between the two speakers, or 48kHz/24bit in completely wireless operation. It also offers AUX and TOSLINK Optical connections.

Simplicity itself

KEF-LSX is reassuringly simple to set up, and incredibly intuitive to operate. Connecting to Wi-Fi takes mere moments via the intuitive KEF Control app. The app also allows LSX to receive over-the-air firmware and features updates. KEF’s optional Stream app enables use of TIDAL and DLNA streaming.


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R3 Speaker
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R3 Speaker

Rs 1.96 Lakhs / PieceGet Latest Price

Model Name/NumberR3
Weight13.5 kg
DesignThree Way Bass Reflex
Drive Units125mm
Crossover Frequency400Hz,2.9kHz
Frequency Range38Hz - 50kHz
Typical in Room Bass Response30Hz
Frequency Response52Hz - 28kHz
Maximum Output110dB
Amplifier Power15 - 180W
Nominal Impedancemin.3.2
Dimension422.2 x 199.6 x 335.5 mm


Uni-Q Driver Array:

Developed by KEF in 1988, the Uni-Q driver array acts as a single point source, providing pristine sound across a wider area. The R Series benefits from a new incarnation of this driver array, with advantages over its predecessors that include a new midrange motor system that drastically reduces distortion.

Air moving across the minute gaps between Uni-Q’s separate elements creates tiny resonances, but KEF engineers have reduced the impact of these necessary gaps by opening a cavity behind the drivers and adding resonance-absorbing damping material for more precise, purer treble.

Shadow Flare:

Derived from the Reference Series, the Shadow Flare reduces harmful cabinet diffraction and allows the Uni-Q to work at its highest level.

More than just a trim ring, Shadow flare is a precision-designed surface that extends the waveguide effect of Uni-Q. The tweeter no longer has line of sight of the cabinet edges, creating a ‘shadow region’ at the points where the potential for diffraction is highest, minimising the acoustic impact to negligible levels.

The result is improved clarity, particularly when it comes to the subtle nuances of plucked strings and percussive sounds.

Low Frequency Drivers:

The R Series’ dedicated low-frequency drivers have a two-part structure, where a shallow concave aluminium skin sits atop a paper cone. This adds stiffness, while the cone’s unique geometry reduces resonances and delivers the pistonic movement that makes these drivers time so well.

The new drivers also have a completely redesigned magnet system that creates a more even magnetic field, and a design of spider that reduces harmonic distortion for a cleaner, more precise sound
Cabinet Bracing:

The R Series benefits from Constrained Layer Damping bracing originally developed for the multiple award-winning LS50, and a new internal bracing layout. This combination brings the R Series closer to the internal structure of the Reference Series, and helps it deliver music as it is supposed to sound, without any unwanted extras.

Flexible Port Technology:

KEF engineers computer-modeled the ideal crossover networks before exhaustively auditioning every high grade component, individually and together, to select those with the lowest distortion and the smoothest response. Perfectionism takes time, but the difference is plain to hear. Nothing is overlooked – Reference crossovers are even mounted on separate boards and decoupled from the cabinet walls to minimize vibration and crosstalk.

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LS50  Speaker
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LS50 Speaker

Rs 1.17 Lakhs / PieceGet Latest Price

Model Name/NumberLS50
Weight7.2kg (15.8lbs.)
DesignTwo Way Bass Reflex
Drive unitsHF 25mm
Frequency Range47Hz - 45kHz
Frequency Response79Hz - 28kHz
Crossover Frequency2.2kHz
Maximum Output106dB
Nominal Impedance8 (min. 3.2)
Dimension302 x 200 x 278 mm

An innovative concept inspired by the legendary LS3/5a, the LS50 mini monitor speaker is designed to bring a professional studio monitor concept into the home.

Rarely the case in such a compact design, the KEF LS50 monitor delivers a rich, multi-dimensional ‘soundstage experience’ that is out of all proportion to its size. Patent-pending acoustic designs, together with state-of-the-art technologies from KEF’s latest flagship Blade loudspeaker, provide the ultimate studio experience – even in the smallest of spaces.


Creating a small housing capable of delivering such a spacious sound is the result of considerable research and development. In cabinet construction, baffle shaping and port design, KEF LS50 breaks new ground with patent-pending technology. All this is made possible by KEF’s leadership in modern research (including techniques such as Finite Element Analysis and Computational Fluid Dynamics*). LS50’s unique technology offers by far the cleanest, most accurate studio-grade performance of any mini monitor.


LS50 employs revolutionary technology developed for Blade, KEF’s latest flagship loudspeaker. Using the very latest Uni-Q driver, specifically designed for this model, LS50 radiates an extremely large listening sweet spot and delivers a remarkably fast, clean sound. And, because LS50 neither adds nor subtracts a single sound, it’s effortlessly natural and accurate too.



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Reference 1 Home Theater  Speaker
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Reference 1 Home Theater Speaker

Rs 1.43 Lakhs / SetGet Latest Price

Minimum Order Quantity: 1 Set

Fm Frequency Range50 Hz
Wattage60 W
Stand Dimensions537 x 324 x 409 mm
Power SourceElectric
Voltage220 V
PhaseSingle Phase


Uni-Q Driver Array:

At the heart of The KEF reference 1 is a stunning new iteration of KEF’s landmark innovation: the Uni-Q point source MF/HF driver array. With a state-of-the-art 25mm (1in.) vented aluminium dome tweeter at the exact acoustic center of a highly sophisticated 125mm (5in.) mid range driver, both act as a single source that floods the listening space evenly with a flawless natural sound field, no matter where you sit. Capturing all the nuances of the human voice, whether whispered, spoken or sung, it sounds as if the person were right there with you in the room. All the jaw-dropping performance and innovative engineering pioneered for the critically acclaimed LS50 studio monitor, and then some. Reference 1 pairs KEF’s latest 125mm (5 inch) MF/HF Uni-Q driver array with the sensational new 165mm (6.5 inch) alloy cone bass driver to create a compellingly realistic sound stage out of all proportion to its size. Mounted on shelves or stands, Uni-Q’s inherently wide, even dispersion also makes it the perfect rear channel speaker in a home theater system that effortlessly reveals all the subtleties encoded in modern soundtracks.

Bass Driver:

Clean, rich and articulate bass grounds your enjoyment of stereo or multi-channel sound, and like everything else about The KEF Reference 1 , KEF’s new 165mm (6.5 inch) LF driver is in a class apart. With a massive vented magnet assembly and a large aluminium wire voice coil driving an exceptionally light, stiff and strong alloy cone, the dynamics and power handling are superb. Played loud or soft, in delicate passages or for full-on bass effects, the combination of advanced materials and clever engineering delivers deeply rewarding lows that blend seamlessly with Uni-Q’s immaculate mid range and treble response.

Cabinet Design:

The KEF reference 1 drivers are set in a smooth, strikingly distinctive front baffle engineered to eliminate response anomalies caused by diffraction. Made from an exceptionally strong laminated aluminium/resin composite and secured via high-loss pads and high tensile bolts, it adds tremendous rigidity to the inert cabinet. Finished by hand in pair-matched wood veneers to complement the composite front baffle, the shape and bracing geometry of the cabinets are computer-optimized to minimize secondary radiation from the cabinet walls and distortion from standing waves. With constrained layer damping to absorb residual vibrations, they’re engineered to eliminate any panel resonance, stray reflections or box coloration effects that would compromise the purity of the sound.

Flexible Port Technology:

The flexible port technology pioneered for the multi-award winning LS50 is used to reduce mid range port resonance, with the flare and profile of each port calculated by computational fluid dynamics to avoid turbulent air noise that might color the sound.
The Reference has innovative adjustable ports for fine-tuning the bass output to your personal taste and the room characteristics providing the ultimate flexibility for any room.

Crossover Design:

KEF reference 1 engineers computer-modeled the ideal crossover networks before exhaustively auditioning every high grade component, individually and together, to select those with the lowest distortion and the smoothest response. Perfectionism takes time, but the difference is plain to hear. Nothing is overlooked – Reference crossovers are even mounted on separate boards and decoupled from the cabinet walls to minimize vibration and crosstalk.

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LS50 Wireless The Biggest Small Music System
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LS50 Wireless The Biggest Small Music System

Rs 2.15 Lakhs / PieceGet Latest Price

Frequency Range40Hz - 47kHz
ModelLS50 Wireless Music System
CompatibilitySpotify Connect Tidal HiFi Roon
Drive Units25mm
Frequency Response45Hz - 28kHz
Max Peak SPL106dB
Inputs2.4GHz/5GHz Dual-band Wi-Fi network
Bluetooth Range10m
Bluetooth Memory8 Devices
ResolutionUp to 24bit Depending on Source Resolution
Sampling RateUp to 192kHz
Power Input100 - 240VAC 50/60Hz
Dimensions300 x 200 x 308mm

All of the acoustic features and innovations that set the KEF LS50 wireless apart from every other speaker in its class remain. The FEA-designed cabinet with its constrained layer damping bracing and precision engineered curved baffle, the Uni-Q driver and the elliptical flexible port all work in concert to prevent cabinet vibration and resonances that produce unwanted sound coloration – putting you that much closer to how your favorite music was intended to sound.

Uni-Q Sound Taken To The Next Level:

To get the most out of your music, every note should arrive at your ears at exactly the right time. Before KEF perfected our Uni-Q technology, this perfect time alignment could only be experienced in a small ‘sweet spot,’ leaving listeners outside of the ‘sweet spot’ with a less than ideal listening experience. Uni-Q changed that, opening up the optimum listening space to practically every spot in your room. The KEF LS50 Wireless employs an advanced time correcting DSP crossover which takes that awesome achievement to the next level by correcting for inherent time delays introduced in the crossover stage. Amazing sound dispersion matched only by a live music performance is now attainable in virtually every room. This incredible achievement cannot be reproduced by any other active speaker.

Crossover Timing Correction:

Every note should hit your ears at exactly the right time. Previously, this perfect time alignment was only a theoretical ideal and perfectly accurate sound could only be experienced within a small ‘sweet spot’. With LS50 Wireless’ advanced time correcting DSP crossover and the unique sound dispersion abilities of Uni-Q, accurate sound reproduction can be achieved in practically every location in any type of room. This is a feat that cannot be reproduced by any other active speaker.

A Complete Fully Active System:

The KEF LS50 Wireless features an end-to-end 192kHz/24-bit high-resolution digital signal path, a streaming pre-amplifier, and two separate DACs for each channel, for a total of four. Powered in the analogue stage by an incredibly fast and clean 230 Watts per channel in a bi-amp dual mono configuration, the LS50 Wireless is a complete, high-fidelity music system that will cost you far less than you’d spend putting together the separate components necessary to match the performance of the LS50 Wireless. KEF LS50 Wireless gives you all of the connectivity options you’ll need to get the most out of your music, including 2.4GHz/5GHz Dual-band Wi-Fi, Bluetooth 4.0 aptX, Asynchronous USB Type B, TOSLINK Optical, and RCA-type line-level analogue inputs. A dedicated LS50 Wireless app (available for iOS and Android) easily facilitates network setup, music streaming, playback and DSP control.

Ultimate Flexibility:

An incredible listening experience is easy as plugging in. Simply connect both LS50 Wireless speakers to a power source and connect an audio source to enjoy high quality sound that music deserves. Adjust how the LS50 Wireless sounds using a selectable EQ tuned to compensate for different mounting scenarios, creating more options for placement and positioning. Regardless of placement, Uni-Q technology disperses sound evenly for total listening enjoyment. Use the touch sensitive control panel or the remote control to ensure complete control of LS50 Wireless from a different aspect. A dedicated iOS or Android app can allow detailed adjustment to optimise sound for different rooms.

• In The Box:

– KEF LS50 Wireless Music System (Right: Master speaker; Left: Slave speaker)
– 2m Power cord x 2
– 3m Cat-6 Inter-speaker cable x1 (Required to connect Left and Right Speakers together.)
– 2m USB cable x1


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