Reference Series Model 104 SP1038

Stand-mount hi-fi loudspeakers with a bass unit, tweeter and passive radiator in Walnut, Teak or White finish wooden cabinets will black microcellular foam grilles.

Specification
Enclosure type: Passive radiator
Input Impedance: 8 ohms
Rated maximum power: 50W programme
Amplifier Requirements: 15-50 watts per channel into 8 ohms
System resonance: 35Hz, mechanical reflex
Frequency range: 30-30,000Hz
Frequency response: 50-20,000Hz +/-2dB
Sensitivity: 12.5 watts for 96dB at 1m and 400Hz in anechoic conditions
Crossover Frequency: 3000Hz
Drive units: B200 bass unit (SP1039), BD139 passive radiator (SP1042), T27 tweeter  (SP1032), Crossover: SP1041

HiFi-Regal/Standbox mit 50 Watt maximum an 8 Ohm. 2-weg mit Passivradiator.

Geschlossenes Gehäuse; Volumen 35.5 Liter.
Gesamtfrequenzbereich : 30-30.000Hz.
Spezifischer Frequenzgang : +/-2dB 50-20.000Hz, +/-5dB 35-35.000Hz, -10dB at 30Hz.
Verbaute L-S-Chassis: T-Ton BD139 SP1037, T/M-Ton B200 SP1039, H-Ton T27 SP1032.
Frequenzweiche: DN15 SP1041, Uebergangsfrequenz: 3.000Hz. Besonderheit: Der BD 139 (ohne Schwingspule) ist akustisch mit dem B200 gekoppelt.

In questo link sono elencati 36 modelli, di cui 35 con immagini e 10 con schemi.
Elenco delle radio e altri apparecchi della KEF Electronics; Tovil, Maidstone, Kent