Decca London Ribbon
The new London High Frequency Speaker is the latest result of the continuous development by Decca of speakers using the ribbon principle.
This unit possesses all the inherent advantages of its predecessor the DK30 while being able to handle frequencies from 1000Hz to beyond the audio range.
Now bass speakers specifically designed for handling only the low frequencies (previously only usable with the ribbon speaker in conjunction with a mid range unit) can be used with the London Ribbon Speaker in a two unit system. This eliminates the added phasing problems encountered with three-speaker systems.
The existence of the London Speaker is important in that it coincides with the emergence on the Hi Fi market of pick-ups and amplifiers which can faithfully reproduce the top end of the frequency spectrum.
However, what is not generally appreciated is that many types of conventional moving coil tweeters are unable to reproduce the complicated transients, and often cause listening fatigue through their attempts to do so.
The quotation of a frequency response gives no indication of a speakers transient response: standardisation of a method of transient response quotation is still a matter of controversy.
Frequency response: 1000 to 25000Hz
Power handling: 30 watts
Crossover frequency: 1000Hz
Impedance: 8 ohms
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