Kef Reference 104 in ottimo stato senza imballi.
Excellent conditions / Without original box
International Buyers are welcome!
We ship all over Europe and the world. Please feel free to ask for shipping costs and other information.
400€
Kef Reference 104 in ottimo stato senza imballi.
Excellent conditions / Without original box
International Buyers are welcome!
We ship all over Europe and the world. Please feel free to ask for shipping costs and other information.
In 1976 the system was updated into the 104aB, where aB was an abbreviation for ‘acoustic butterworth’, relating to the shape of the acoustic response of the midrange and treble drivers in the crossover region. Perfect integration of the units will only happen if the acoustic responses of the two units conform to a precise characteristic. Previously, crossover filters had been designed primarily on the basis of the electrical response of the filter but, in reality, the acoustic roll-off is also a function of the natural roll-off of the driver response. By considering the filter and driver as a combined system the filter response can then be optimised to give the precise acoustic roll-off necessary for perfect integration.