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Reference Series Model 104/2 (1984-96)
In 1984 KEF introduced the Model 104/2 – a loudspeaker that was to develop a strong reputation around the world for its technical innovation and acoustic performance. Such was its success that it remained in production for over ten years and, following on from the Model 105.2, was further evidence of the technical capability of KEF’s research and development facility which had been progressively developed through the 1970s and 80s.
Model 104/2 was a high output, high sensitivity speaker system possessing exceptional dynamic capability, able to reproduce a very wide dynamic range at high output levels. The optional KEF KUBE equaliser was available to extend the low frequency response down to 20Hz (-6dB, Q=0.5). Technical features included chassis-less midrange units, conjugate load matching and the twin coupled cavity bass reproduction system. A bi-wired version was introduced in 1990 and it was later included in the Raymond Cooke Series along with the Reference Series Models 107/2 and LS3/5A.
Specification: Model 104/2
System Type: Three-way, floor standing
Enclosure type: Coupled cavity
Size: 900 x 280 x 415mm (35.5 x 11 x 16.5 inches)
Weight: 32kg (70.5 lb)
Nominal Impedance: 4 ohms resistive (20Hz-20kHz)
Rated maximum power: 200W programme
Amplifier Requirements: 25-200 watts per channel into 4 ohms
Frequency response (standard): 55-20,000Hz +/-2dB at 2m on design axis
Frequency response (with matching KUBE): 35-20,000Hz +/-2dB at 2m on design axis (-6dB at 20Hz, Q=0.5)
Sensitivity: 92dB at 2m on reference axis for a pink noise input of 2.83V (anechoic conditions)
Maximum output: 112dB on programme peaks under typical listening conditions
Finishes:  Selected real wood veneers
Grille: fabric
System: SP3037
Drive units: 2 x B200 bass unit (SP1188), 2 x B110 midrange unit (SP1190), T33 tweeter (SP1191)
Crossover: SP2050 (1984 only: SP2042, 2043, 2046).
System: SP3128 (Bi-Wire version, 1990 onwards)
Drive units: 2 x B200 bass unit (SP1256), 2 x B110 midrange unit (SP1274), T33 tweeter (SP1191)
Crossover: SP2173