VOX FOCUS SPEAKERS FOR THE SOLID STATE LINE - 1969 and later
Page from the Vox Sound Limited (VSL) catalogue of August 1970 showing the "Focus Linesource". They cost £65. For catalogue and pricelist, see this page.
The blurb reads: "These speakers have 50W output, each section containing four 10" eliptical speakers making a total of eight. These two units fold and clip together for easy transport. The speakers are specially made for first class PA reproduction. The sound can be beamed to a focal point or the cabinets unhinged to give a widespread sound.
Above two pairs of Focus speakers latched for carrying.
The line was designed in-house at the West Street Works in 1969 and made ready for launch at the British Musical Instrument Trade Fair in August 1969.
As the catalogue shows there was only one set at first - simply "Focus Linesource" - capable of handling 50 watts. By late 1970 an accompanying pair had been developed - the "Focus 100", capable of handling 100 watts, as the name indicates, but produced in smaller numbers.
The old Linesource 40 and 100 units (LS40 and LS100), which had been developed in late 1963, were deleted from the catalogue - they last appear in 1969.
The new sets were designed to be used with the Vox solid state public address amplifiers - the SS PA50, SS PA100, and Midas. For those, see this page.
The Focus 100 Linesource speakers first make their appearance in a notice published in "Beat Instrumental" magazine, July 1971, presumably having been developed for the Associated Musical Instrument Industries show in August (the A.M.I.I. being the successor organisation to the British Musical Instrument Trade Fair).
Section from the Beat Instrumental notice. The Focus 100s cost £120.00 in July 1971, no small amount.