KEF Reference Series Model 104

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Enclosure Type:	2 way closed box Edit: with passive "Sub LF Radiator"
Rec Amplifier:	15 - 50 Watts
Power Handling:	50 Watts
FQ Response:	50Hz - 20kHz +/- 2dB
Low FQ Response:	-10dB @ 30 HzHz
Crossover FQ:	3kHz
Crossover Type:	SP1041
Sensitivity:	96dB (12.5 Watts, 400Hz)dB
Impedance:	8 Ohms
Internal Volume:	35.5 Litres
Drivers:	1 x T27 tweeter (SP1032) 1 x B200 bass unit (SP1039) 1 x BD139 passive radiator (SP1042) Edit: Instruction book July 1973 says SP 1037 Edit: Dividing Network DN15 SP1041
Other:	System SP1038 Edit: R104ab (SP????) had redesigned "Acoustic Butterworth" (ab) crossover (DN?? SP????), giving better mid-range separation and stereo imaging, and increased power handling 100W with fuse to protect tweeter.
Dimensions:	330 x 630 x 260mm (W x H x D)
Weight:	15.8kg / 34.76lbs
Year:	1973 - 1976
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