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Authorized KEF Subwoofers Repair Service Center

We are an authorized KEF subwoofers repair service center. Providing KEF subwoofer repair in and out warranty in Minneapolis and St Paul Minnesota. We repair Vintage Stereo, AV Receivers, Amplifiers, Power Amplifiers, Integrated Amplifiers, Preamps, CD Players, CD Changers, Stereo Receivers, Powered Speakers, Tape Recorders, Tuners and Turntables. When KEF was founded in 1961, by Raymond Cooke and a small group of like minded colleagues, the prime objectives were to design loudspeakers using the latest materials technology and with the best engineering methods. The 1960s was a hotbed of innovation in drive unit technology with significant contributions from a number of commercial companies as well as the BBC’s Research and Design departments. The first drive units designed and developed by KEF formed the K1 series of products. They comprised the B1814 bass unit, with a flat diaphragm of polystyrene with aluminium foil laminated to the front and rear surfaces, the M64 elliptical midrange with the same polystyrene/aluminium foil laminate structure, and the T15 tweeter with a dome made from aluminized melinex. The early brochures make a point of emphasising that all drive units in KEF loudspeakers have diaphragms of synthetic materials. Most loudspeakers at the time had diaphragms made of paper compounds, which could suffer from sound colouring resonances, sensitivity to climatic conditions and batch-to-batch variations in production; and the thought was hat plastic materials ought to offer significant advantages. The fact that bextrene and later polypropylene came to dominate the market for serious Hi-Fi drivers pays tribute to this vision. Credit ought to be given also to those who continued to develop the technology behind paper and fabric diaphragms as they now have an equal standing with plastics and metals in high-end audio. Hot on the heels of the B1814 came the B139 (13 by 9.25 inches in size), probably the most famous of the KEF drive units. Again the diaphragm was polystyrene with aluminium foil laminated to the front and rear surfaces. Its midrange performance was just about good enough to integrate directly with the T15 tweeter allowing the K2 series of 2-way products to be designed including the Celeste and Duette.    .http://www.kef.com/html/us/ KEF C4 Subwoofer Unobtrusive, handsome and powerful, the C4 subwoofer delivers incredible bass while maintaining control throughout its range. With a 200W on-board amplifier driving a 200mm (8in) front-firing bass cone, the C4 is engineered to minimize distortion and add effortless depth and weight to any performance. Powered bass reflex subwoofer Drive Units: 1 x 200mm (8in.) LF Frequency Response: 29Hz - 140Hz , 200W built-in Class D amplifier Dimensions: 345 x 320 x 377 mm (13.6 x 12.6 x 14.9 in.), Weight: 27 lbs. Finishes Available: Classic Black Ash We guarantee our COD parts and labor for 90 days. Warranties apply to the original repair only, physical damage, shorted outputs in Stereo, abuse, power surge, lightning, are not covered. Original manufacturer warranty applies.

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