Revox B77 MK III Stereo Tape Recorder
The new Revox B77 MK III Stereo Tape Recorder represents a re-conception and significant enhancement of the iconic B77 product by the Revox development team. The entire audio electronics have been optimized using components and simulation capabilities available today. Proven components are retained, such as improved original Revox tape heads with significantly extended lifespan and the unique Revox motors. All new details, including the audio technology for even better sound reproduction and recording quality, the precisely manufactured, high-quality tape heads, the pressure roller, a digital counter, the playback capability for all common tape standards, the XLR IN/OUT, and versatile connection and optional expansion possibilities, have been perfected by our developers, technicians, and designers.
The B77 MK III is manufactured at the Revox factory in Villingen (Germany).
Front View: The front view of the Revox B77 MK III Stereo Tape Recorder displays a professional audio device with a brushed metal panel. It features two large VU meters, numerous control buttons and switches for playback, recording, and tape transport functions, a tape counter, and space for two large reel-to-reel tape spools. The Revox logo is prominently displayed.
Rear View: The rear view of the Revox B77 MK III Stereo Tape Recorder shows its connectivity panel. This includes various input and output jacks such as XLR connectors, 6.3mm (1/4-inch) jack sockets for microphones and headphones, and DIN connectors for specialized functions like VariSpeed and remote control. The power input socket is also visible.
Technical Data (Measured Over Tape)
| Feature | Specification |
|---|---|
| Art. No. | 117703300 |
| Dimensions H x W x D (mm) | 414 x 452 x 207 |
| Weight (kg) | 18 |
| Drive System | 3-motor drive; 2 AC reel motors; 1 AC capstan motor, electronically regulated |
| Tape Speeds | 19 cm/s and 38 cm/s, electronically switched; with external tone motor control adjustable by ±7 semitones |
| Wow and Flutter | 19 cm/s: better than 0.08 % 38 cm/s: better than 0.04 % |
| Reel Size | Up to 26.5 cm (10.5") diameter |
| NAB Equalization | 19 cm/s: 50 µsec / 3180 µsec 38 cm/s: 50 µsec / 3180 µsec |
| CCIR Equalization | 19 cm/s: 70 µsec 38 cm/s: 35 µsec |
| Frequency Response at -20 dBu | 19 cm/s: 30 Hz ... 20 kHz +2/-2 dB, 50 Hz ... 16 kHz ±1.5 dB 38 cm/s: 30 Hz ... 22 kHz +2/-2 dB, 30 Hz ... 20 kHz ±1.5 dB |
| Full Scale Calibration | 514 nWb/m corresponds to 6 dB above 0 VU |
| Level Meters | VU meter according to ASA standard, with LED overload indicators |
| Total Harmonic Distortion¹ | 19 cm/s: < 0.3% 38 cm/s: < 0.24% |
| Signal-to-Noise Ratio² | 19 cm/s: better than -70 dB 38 cm/s: better than -70 dB |
| Feature | Specification |
|---|---|
| Crosstalk Damping | Stereo: better than -58 dB |
| Erase Damping³ | better than -78 dB |
| Inputs per Channel | |
| Position LO | 0.15 mV / 2.2 kOhm for microphone (50 ... 600 Ohm) |
| Position HI | 2.8 mV / 110 kOhm for microphone (50 ... 20 kOhm) |
| AUX | 40 mV / 220 kOhm; Overload capability for all inputs: 40 dB |
| Outputs per Channel | |
| OUTPUT | 1.55 V at +6 VU (asymmetrical/symmetrical) |
| PHONES | 3 V output voltage / Ri 82 Ohm; suitable for headphones 32 - 600 Ohm |
| Connections | XLR (Line-in/out symmetrical; RCA adapter asymmetrical), 2x 6.3 mm jack microphone, 2x 6.3 mm jack headphone, DIN 4-pin for VariSpeed connection, DIN 9-pin for remote control |
| Power Supply | 108 ... 240 V ±10% switchable: 100 V, 120 V, 140 V, 200 V, 220 V, 240 V; 50 ... 60 Hz without switching; max. 73 Watt |
| Mains Fuse | 100 .. 140 V: 1 AT 200 .. 240 V: 0.5 AT |
¹ Measured as specified, over tape at 510 nWb/m
² Measured at 0 VU (257 nWb/m)
³ Measured at 2.5% Total Harmonic Distortion
&sup4; Measured at 19 cm/s
Designed, developed and made in Germany
www.revox.com
© Revox Group | TD-B77_MKIII 08-25 | Technical modifications reserved.
