Reference Series Home Theatre Model 70S, Model 40B

Reference Series Model 70S (1993-98)
 
The compact Model 70S was designed as a rear effects speaker in surround sound applications, but could also be used as a main speaker in a dedicated sub-sat system, in particular with the matching 40B subwoofer. Using the same Uni-Q array as in the Model 90 centre speaker, uniform coverage over the listening area was assured, as was the timbre match with Reference Series main speakers.
 
Reference Series Model 40B (1993-98)
 
Designed specifically to partner the 70S satellite speaker, but more than capable in a home theatre system based around any of the KEF Reference Series loudspeakers, Model 40B used the same twin coupled cavity bass loading technique employed for the top models in the range. Model 40B helped to strengthen the home theatre capability of the KEF loudspeaker range at a time when the market was growing rapidly and demanding quality products. For two-channel or multi-channel, the 40B gave the KEF customer increased flexibility in creating the optimum home audio system.
 
Specification: Model 70S
System type: Two-way, stand/wall-mount
Enclosure type: Closed box
Dimensions (H x W x D): 253 x 170 x 119mm (10 x 6.7 x 4.7 inches)
Weight: 3.1kg (6.8 lb)
Nominal impedance: 6ohms
Amplifier requirements: 10-100W (into 4 ohms)
Frequency range: 120Hz to 20kHz +/-3.0dB at 2m on reference axis
Sensitivity: 87dB at 1m on reference axis for a pink noise input of 2.83V (anechoic conditions)
Maximum output: 107dB on programme peaks under typical listening conditions
System: SP3182
Drive units: B160 bass/midrange unit (SP1320), NT19 tweeter (SP1352)
Crossover: SP2222
 
Specification: Model 40B
System type: Powered Subwoofer (150W)
Enclosure type: Dual coupled cavity
Dimensions (H x W x D): 565 x 280 x 480mm (22.2 x 11 x 18.9 inches)
Weight: 29.8kg (63.6 lb)
Amplifier requirements: 10-100W (into 4 ohms)
Frequency response: 35Hz to 150Hz +/-3.0dB at 1m on reference axis
Maximum output: 111dB at 1m (anechoic conditions)
System: SP3181
Drive units: 2 x B200 bass unit (SP1339)
Amplifier: SP2221