Housed in an idyllic country setting in Devon England, Graham Audio is a family owned company dedicated to preserving and expanding the legacy of the world famous BBC Loudspeakers designs. In addition, Graham has taken the exciting step of expanding the BBC principles to creating floorstanding versions of the LS6 and the LS 59 appropriately dubbed the LS6f And LS59F respectively.
As much as possible Graham Loudspeakers are manufactured exactly as they were in the late 1950s and early 1960s using thin wall birch cabinets design.
AS an example it is well known that The air enclosed by the cabinet must be considered. With no additional treatment, standing waves will establish themselves between opposite panels, and these will have a ruinous effect on the sound quality, especially in the mid-range. Most loudspeakers use acoustic foam, but the BBC preferred to use Rockwool slabs for the LS5/8 and LS5/9, held in place by a layer of fabric.
This approach is more expensive than foam, both in terms of material costs and time taken during construction, but Rockwool has proven itself to be extremely consistent over many decades so that is what Graham uses .