A completely new hi-fi range was showcased at the 1977 audio specialist exhibition, together with the Revox B 77 reel-to-reel tape deck. As well as the B 750 amplifier and the B 760 FM tuner, this included the B790 record player and the BX series speakers.

There weren’t any significant differences between the B 77 drive and the tried-and-tested A 77 design. Rather , new features had been integrated during the development, which previously had only been available in the exclusive and expensive A 700. The B 77 was controlled though pinch-point buttons. An integrated drive control logic handled the execution, taking into account the movement state of the tape through tape sensors. In this way, there was remote controllability of all functions. An external capstan motor control permitted tape speed variations of +/- 10%. The B 77 was equipped with a cutter and gluing bar to make tape splicing very easy.