QUAD series 33, 34 and 44. Among experts of industrial design the Hifi chain of the series 3 is regarded as those QUAD has formally succeeded best. Because of this it was honored by the Council Of Industrial Design with the Design Award. But not only externally this units which came out in 1967 have to offer something. Quad had developed a special transistor-circuit which ended the disadvantages opposite the tube amplifiers in regard of sound quality. Typical for Quad is also the virtually spartan provision with operating knobs. An extraordinary inner effort contrasts with this. The circuits components are built on separate replaceable pc boards to allow the customization of the equipment to various tone sources. Because this Hifi chain was very popular during its production time, is refurbished available in sufficient quantities today.