KEF LS50 Bookshelf Speakers - Pair

• Innovation is what sets kef apart. It's why we were founded, and why we've always attracted some of the world's most gifted acoustic engineers.
• The results are plain to see, in long lists of breakthroughs that no other manufacturer can match - and we have the patents and academic papers to prove it.
• Right from the start, we pioneered the use of synthetic materials for diaphragms and driver surrounds to maintain consistent sound quality across the frequency range.
• In the mid-sixties, we were the first to commercially exploit the stability of bextrene as a cone material, with a range of drivers that found their way into many leading audiophile speakers.
• A hugely important breakthrough came a few years later, when kef became the first company to use computers in loudspeaker testing and design.
• Having led the industry in the digital analysis of speaker behaviour ever since, this unrivalled capability is what still underpins kef's technological supremacy. 
• The next decade saw the appearance of kef's signature technology, the uni-q point source driver array. Using nasa-developed magnets ten times more powerful than conventional materials allowed us to engineer a tweeter small enough to mount at the acoustic centre of the bass unit voice coil so that both acted as one. 
• With the advent of 5:1 home theatre recordings in the nineties, kef was once again ahead of the game by applying the performance advantages of uni-q to the uk's first dedicated centre speaker, the model 100. 
• Other kef firsts include the first motorised ceiling speaker and acoustic compliance enhancement technology, which achieves truly full-bodied bass performance from small enclosures. 

Kef innovation

• Kef was founded on innovation and new technology.
• We are recognised in the history of loudspeaker development as one of the most important contributors and a great deal of our research has been published at well respected professional institutions, including the audio engineering society and the institute of acoustics.
• Kef's research legacy includes contributions from some of the greatest and most respected loudspeaker designers of the last five decades.
• Today, kef are the company to beat in computer analysis of loudspeakers. The software that we use to run our analyse is also used to power eighty-five percent of the world's super computers. 

Product Highlights:

• Reference-level performance in a "Mini monitor" design
• Ideal for a high-end stereo music system
• Uni-q® driver array technology makes your entire room sound like the "Sweet spot"
• 5-1/4" magnesium/aluminum alloy woofer
• 1" vented aluminum dome tweeter
• Frequency response: 79-28,000 hz (±3 db)
• For deep, hard-hitting bass consider adding a powered sub to complement the ls50s
• Sensitivity: 85 db
• High-current amplification from a quality power amp or integrated amplifier is recommended for best performance
• Impedance: 8 ohms
• Recommended amplifier power: 25-100 watts
• Constrained layer damping prevents cabinet rattling and vibrations
• Curved baffle design ensures smooth soundwave dispersion with minimal reflection
• Bass-reflex cabinet with elliptical rear port for accurate, musical bass
• 5-way binding post speaker terminals
• High gloss piano black finish
• 7-15/16"W x 11-15/16"H x 10-15/16"D
• Weight: 7.16 kg. (each)
• Warranty: 3 years

Features & Specs

• Enclosure : bass reflex
• Video shielded : no
• Tweeter type : vented dome
• Tweeter size (inches) : 1
• Midrange size (inches) : n/a
• Woofer size (inches) : 5.25
• Woofer composition : magnesium/aluminum alloy
• Woofer surround : rubber
• Power range : 25-100
• Sensitivity : 85 db
• Impedance (ohms) : 8
• Frequency response : 79-28k hz
• Connector type : post
• Bi-amp inputs : no
• Height (inches) : 11-13/16
• Width (inches) : 7-7/8
• Depth (inches) : 10-15/16
• Weight (kg) : 7.16 each
• Mounting bracket included : no
• Recommended stand height (inches) : 18-28
• Warranty : 1 years

What's In The Box:

• Kef LS50
• Owner's Manual
• 2 Bookshelf Loudspeakers
• 2 Foam Port Plugs
• 8 Self-adhesive Rubber Feet
• Owner's Manual
• Warranty Registration Card