Rare British speakers with walnut cabinet (real wood veneer). Non removable silver front coverings. (can be removed but need to be glued back on again) Dimensions each approx. 25x40x23,5 cm (WxHxD). Ideal for tube amps. Small traces of use. Matched pair of speakers serial numbers. Tested and working 100% Great vintage sound! The LEAK Sandwich was an innovative loudspeaker design introduced by the English hi-fi company H. J. Leak & Co. in 1961. Harold Leak engaged Don Barlow, who had devised a way of making the cone of the loudspeaker from expanded polystyrene foam sandwiched between two sheets of aluminium foil. This made it both very light and extremely stiff, and correspondingly accurate in sound. The 'Sandwich 200' model had a 200 mm (8 in) version of Barlow's foam-and-foil sandwich driver, together with two 60 mm (2.4 in) purple Mylar coned elements, one employed as a midrange, and the other as a tweeter. This smaller model was a great commercial and critical success for Leak, and was produced for some years. Since transistorized amplifiers had become more common by this time, it was rated at a more contemporary 4 to 8 Ohms, with power handling of 18 watts.