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Απάντηση: Τα Δυο ΚΑΘΑΡΟΑΙΜΑ...(HARBETH 40.1)
BBC Monitor History(LS 3/5).
BBC Monitor History(LS 3/5).
The concept of this speaker was to suit those BBC environments where monitoring on headphones was not satisfactory and yet there wasn't sufficient room for a 'Grade I' monitor. A Grade I monitor can be used for critical tonal balancing of programme material, setting of microphone positioning, etc. Current Grade I monitors are the LS5/8 and LS5/9. A grade II monitor may be used for checking the quality of programme, but balance and mic positioning are normally Grade I-checked unless there is no alternative. It was recognized that what would be required was a small Grade II unit with some sacrifice of bass response and loudness reproduction, this being justified for the sake of achieving compactness. The likely users were, for instance, the production control areas of television OB control vans, where there producer needs to listen at a lower level than that used for the actual mixing.
Pictured is the model speaker the BBC used from 1972 until 1980, which represented a major step in the modeling process. Although it had its limitations, primarily in terms of its tonal quality and maximum power handling, components of this small loudspeaker were found to be of a sufficiently high quality to help fulfil the demand for the unusually compact monitor needed in outside broadcast use. This was therefore packaged and called the LS3/5 and showed the model experimenters to have achieved good results.
Ενδιαφέρον άρθρο.Acknowledgements
I am indebted to BBC Engineering for ensuring the accuracy of this article. Within the BBC the work of two people, T Somerville and D E L Shorter, must be considered as having laid the foundation for current standards. The particular work on the LS3/5A was carried out by Messrs H D Harwood of Research Department and both M E Whatton and R W Mills of Designs Department