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KEF's Reference Series loudspeakers aim for finest performance and high sound pressure levels without damage.
Highlights KEF's 12 years of engineering development and introduction of new techniques in speaker technology.
Details the three-way system with laminated diaphragms, bass radiator, tweeter, and acoustic contour control.
Specifies the ideal room size for the Model 104, up to 300 cubic metres (10,000 cu. ft.).
Recommends amplifiers rated up to 50 watts into 8 ohms for optimal performance.
Guidance on connecting speakers using provided cables or 4mm sockets, and DIN connectors.
Instructions on ensuring correct polarity for stereo installations and checking phasing.
Recommendations for placing the Model 104 on shelves or furniture between 50cm and 127cm height.
Guidance on optimal placement within a room for best stereo imaging and bass response.
Discusses the impact of room resonances on sound quality and how to mitigate low-frequency colouration.
Explains the function of the mid-range frequency adjustment control for room correction.
Details KEF's five-year warranty for the original purchaser and service assistance.
Provides detailed technical data including dimensions, impedance, power ratings, and frequency response.
Details the BD139 SP1042 bass unit, its development, and function in augmenting bass output.
Describes the B200 SP1039 LF radiator with its Bextrene diaphragm and motor assembly.
Details the T27 SP1032 HF radiator with its Melinex dome and extended frequency range.
Describes the DN15 SP1041 six-element network dividing at 3,000Hz with an 18 dB/8ve slope.
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