KEF Model 203
Price unknown (1 unit, late 1970 s)
Commentary
A two way speaker system.
The low band is equipped with KEF KEF original Bexstrene material.
KEF developed by KEF in the early' 60 s. Computer analysis showed that the quality characteristics of the material were stabilized. The material has adequate internal losses, uniform properties, and minimal change over time.
A 2.5 cm dome-shaped tweeter is installed in the high range.
A newly developed network developed using a computer is used in the network section to minimize the fluctuation of characteristics near the crossover point and realize smooth connection.
The enclosure is hermetically sealed and has a natural wood finish on the exterior.
.jpg)
Model Rating
| Method | 2-Way, 2-Speaker, Airtight Type, Bookshelf Type |
| Units Used | Low band : Unknown For high-pass : 2.5 cm dome type |
| Frequency characteristic | 68 Hz ~ 20 kHz ± 2.5 dB (2m on axis) 42 hz to 30 khz -10dB |
| Directional characteristic (2 db deviation) | Horizontal : ± 20 ° (within 10 kHz) Vertical : ± 5 ° (within 20 kHz) |
| Impedance | 8 Ω |
| Output sound pressure level | 89 dB SPL (1m/1W, on-axis) |
| Maximum sound pressure level | 106dB SPL |
| Distortion factor (1m on axis, sound pressure 90 db) | Second harmonic distortion : 1% or less (150 Hz to 20 kHz) Third harmonic distortion : 1% or less (50 Hz to 20 kHz) |
| Allowable input | 100W (program) 20 Vrms (continuous sine wave, 20 Hz to 2.5 kHz) 8 Vrms (continuous sine wave, 4 kHz to 20 kHz) |
| Enclosure volume | 19 liters |
| External dimensions | Width 280x Height 470x Depth 217 mm |
| Weight | 8.3kg |