Historical Significance

The Revox B77 tape recorder was presented at the 1977 audio trade shows together with a completely new hi-fi line. This included:
• B750 amplifier
• B760 FM tuner
• B790 record player
• BX series loudspeaker cabinets in the new design

Available Versions

The B77 MKI was available in several variants:
• Standard version with speeds of 9.5/19 cm/s
• B77-HS with 19/38 cm/s (High Speed)
• B77-LS with 4.75/9.5 cm/s (Low Speed)
• B77-SLS with 2.38/4.75 cm/s (Super Low Speed)
• B77-AUTO with automatic recording start
• Three versions with additional pilot head for slide projector control
• B77-DOL with separate Dolby TM-B processors

VALUE PRESERVATION

Even today, a B77 tape recorder can be integrated into the latest Revox Multiuser System and can be controlled via Revox App. Because sustainability is important to us.

QUALITY PROMISE

“Every Revox product is a safe investment in a long life with music – Premium Service included.” Company founder Willi Studer insisted not only on the highest product quality, but also on a service and support quality that guarantees longevity and high value retention.

BUILT FOR ETERNITY

At Revox, we make no compromises when it comes to the reliability and durability of our products. Due to the well-founded knowledge of our employees, function tests with original Revox | Studer measuring instruments, and a unique spare parts warehouse, this is best possible in the Revox factory.

Because only the best is good enough.

Technical Details

Dimensions

weight (kg): 17
depth (mm): 207
height (mm): 414
width (mm): 452

Drive

Three-motor drive
2 AC coil motors
1 AC sound motor electronically controlled

Noise-to-voltage ratio

>64 dB (9,5cm/sec), >67 dB (19cm/sec)

Frequency response

30 Hz bis 20 kHz + 2 dB bis – 3 dB, 30 Hz bis 16 kHz + 2 dB bis – 3 dB

Tape speed

HS 19,05/38,1 cm/s
NS 9,5/19,05 cm/s
LS 4,75/9,5 cm/s
SLS 2,38/4,75 cm/s

Power consumption

max. 80 VA

Synchronisation fluctuation

38 cm/s < 0,06 % 9.5 cm/s < 0,10 % 19 cm/s < 0,08 % Equipment

11 ICs, 1 optocoupler, 4 triacs, 60 transistors, 33 diodes, 5 LEDs, 2 bridge rectifiers, 3 relays

Additional specifications

Slip: max. 0.2 %
Rewind time: 135 sec. for 1100m tape
Coil size: up to 26.5 cm (10.5 inch)