Details are given of the various factors which have led to the design of two new monitoring loudspeakers suitable for use in studios and outside broadcasts. The loudspeakers are much smaller than those of the present type; a floor standing model is designated type LS5/5, and one intended for hanging is called type LS5/6. In the course of the design, the questions of bass pre-emphasis and of directivity have been examined in some detail.

The quality of reproduction and the directional properties are appreciably in advance of those obtained for the LS5/1A and the maximum sound level is also higher. The spread in frequency characteristics between development specimens is extremely small, and the level of non-linear distortion is low.