Revox B77 MKIII

The Revox B77 MK III is a state-of-the-art reel-to-reel stereo tape recorder that builds on the classic B77 design with modern enhancements in mechanics, electronics, and audio fidelity, aimed at both professional studios and audiophiles.

Mechanical and Transport Features

• Three-Motor Drive System: The B77 MK III uses a robust three-motor drive consisting of two strong winding motors and one electronically controlled direct-drive capstan motor with servo control. The winding motors quickly bring heavy metal reels to operating speed with precision and smoothness, while the capstan motor has an extremely tight concentricity tolerance of 0.001 mm to minimize wow and flutter and ensure stable tape speed.

• Tape Compatibility and Speeds: It supports a wide range of 1/4" 2-track tapes with selectable speeds:
  19 cm/s (7½ ips) recording and playback with 257 nWb/m and NAB standard
  38 cm/s (15 ips) recording and playback with 320 or 510 nWb/m and NAB or CCIR standards
  Switches allow easy selection of these modes for flexibility in tape formats.

• Tape Heads: The machine features three precision heads (erase, record, playback) made from a special alloy with improved magnetic properties and significantly longer service life. The playback head gap is precisely 2 µm, and the heads are milled from solid core material for perfect track alignment, ensuring optimal sound voltage output and very low distortion.

Electronics and Audio Performance

• Fully Analog Circuitry: The electronics have been completely redesigned using modern components and simulation tools, with a focus on pure analog signal paths. High-quality film capacitors replace electrolytic capacitors in the audio path to improve sound purity and reliability.

• Balanced Connections: Professional-grade balanced XLR inputs and outputs provide interference-free, studio-quality audio transmission. RCA (Cinch) connectors are also available via adapters. DIP switches allow configuration for either studio or home system operating levels.

• Digital Counter: A digital tape counter offers two display modes-tape counter and elapsed time-calculated based on tape speed and meter reading, aiding precise tape navigation.

• Headphone Amplifier: The built-in headphone amplifier is high quality and capable of driving both low and high impedance headphones with excellent fidelity469.

Physical Specifications

• Dimensions: Approximately 452 mm (W) x 414 mm (H) x 207 mm (D)

• Weight: Around 17 kg

Additional Features

• The B77 MK III maintains the proven mechanical reliability of the original B77, combined with modernized electronics and improved tape heads for enhanced longevity and sound quality.

• It supports all common 1/4" 2-track tape standards with flexible switching for NAB and CCIR equalization and flux levels.

• The machine is suitable for both professional recording studios and high-end home audio systems due to its versatile connection options and robust construction.

In summary, the Revox B77 MK III is a meticulously engineered reel-to-reel tape recorder that offers precise tape transport, superior analog sound quality, and professional connectivity. Its combination of advanced mechanical design, improved tape heads, and fully analog electronics makes it a benchmark for analog tape recording in the modern era.