B77

About the B77

The Revox B77 is a milestone in audio history, launched in 1977 as part of a new hi-fi range. It features a sturdy aluminium die-cast chassis and head block for long-term stability and precision. The tape deck uses a three-motor drive system with two AC coil motors for winding and one electronically controlled AC sound motor for the capstan, ensuring outstanding speed stability and low wow and flutter (0.08% at 7 1/2 ips). The heads are made from Revodur, a magnetically soft metal alloy, providing professional-grade electromagnetic qualities. It supports stereo or two-channel mono operation with separate record and playback heads for three-head monitoring, allowing simultaneous monitoring of the recorded signal. The B77 includes a built-in splicing block and non-magnetic cutter for precise tape editing. It accepts reels up to 10.5 inches (26.5 cm) and offers multiple tape speeds including 3 3/4 and 7 1/2 ips, with some versions supporting higher speeds up to 38 cm/s. The frequency response ranges from 30 Hz to 20 kHz, with a signal-to-noise ratio of 67 dB and total harmonic distortion of 0.5%. Dimensions are approximately 452 x 414 x 207 mm, weighing 17 kg. The B77 is highly regarded for its ruggedness, sonic quality, and studio-level features, making it one of the best home open-reel tape recorders ever made. It was later upgraded to models like the PR99 and MKII/MKIII variants. The product is no longer manufactured but remains popular among audiophiles and collectors.