Revox B 780

Data

General

• Manufacturer: Revox
• Model: B 780 (as B739 as tuner preamplifier without power amplifier)

Type: Receiver

• Years of manufacture: 1980 - 1984
• Manufactured in: Switzerland
• Color: Silver / Grey
• Remote control: yes- but only power on via "Power On Kit" from B710 Tape Deck
• Power consumption: 550 W max.
• Dimensions (WxHxD): 452 x 151 x 420 mm
• Weight: 17 kg
• Original price approx.: 3'500 DM

Connections

• Number of inputs:
  • Phono MM: 3.0 mV, 47 kOhm, 220 pF, 160 mV max.
  • Phono MC: 0.1 - 2 mV, 100 Ohm, 6 mV max.

Aux: 150 mV, 50 kOhm, 8 V max.

• • Tape Play 1, 2: 150 mV, 50 kOhm, 8 V max.

Tape Play DIN 1, 2: 150 mV, 50 kOhm, 8 V max. FM antenna: 75 Ohm, 300 Ohm

• • MW antenna: 300 Ohm
• Number of outputs:
  • Tape Rec 1, 2: 135 mV, 47 kOhm.
  • Tape Rec DIN: 5,5 mV, 10 kOhm
  • Pre Out 1, 2: 2 V, 4 V, 1 kOhm
  • Headphones (6.3mm jack): 4 V, 220 Ohm
  • 2 speaker pairs

Technical Data

Amplifier

• Continuous power (at distortion)
  • 8 Ohm: 2x 80 W (RMS, 20 - 20'000 Hz)
  • 4 Ohm: 2x 110 W
• Dynamic power
  • 8 Ohm: 110 W
  • 4 Ohm: 140 W
• Total harmonic distortion: 0.01 %
• Attenuation factor: 100 at 8 Ohm
• Frequency response:
  • Phono: 20 - 20'000 Hz, ± 0,3 dB
  • High level: 20 - 20'000 Hz, + 0 dB, - 0,3 dB
• Signal-to-noise ratio:
  • Phono MM: 73 dB
  • Line: 90 dB
• Tone control:
  • Bass: ± 8 dB at 120 Hz

Presence: ± 8 dB at 3 kHz Treble: ± 8 dB at 8 kHz

• Loudness: + 5 dB at 100 Hz, + 6 dB at 10 kHz
• High Filter: - 3 dB at 8 kHz, 12 dB / octave
• Low Filter (Subsonic): - 3 dB at 18 Hz, 12 dB / octave

Mute: - 20 dB

Tuner

• Reception: FM, MW
• Frequencies:
  • FM: 87.5 - 108 MHz
  • MW: 530 - 1610 kHz
• Input sensitivity:
  • FM: 2.5 µV
  • MW: 25 µV
• Frequency response: 20 - 15'000 Hz, + 0,3 dB, - 0,8 dB
• Distortion factor:
  • Mono: 0.08 %

Stereo: 0.1

• Signal-to-noise ratio:
  • FM:
    • Mono: 78 dB
    • Stereo: 72 dB
  • MW: 50 dB
• Channel separation: 50 dB
• selectivity: 60 dB
• Co-wave selection: 0.8 dB
• Spurious wave selection: 110 dB
• IF attenuation: 110 dB
• IF attenuation: 110 dB
• MW suppression: 72 dB
• Station memory: FM, MW a total of 29 memory locations for free programming

Special Features

• Tone Linear switch
• Tape Dubbing
• Automatic station search
• Mono / Stereo switchable

Remarks

• Other models in the same series:
• Amplifier:
• Revox B 750
• Revox B 750 MK II

• Power amplifier:
• Revox A 740

• Tuner:
• Revox B 760

• Receiver:
• Revox B 780

• Preceiver:
• Revox B 739

• CD player:
• Revox B 126

• Tape Deck:
• Revox B 710

• Reel Tape:
• Revox B 77

• Record player:
• Revox B 790
• Revox B 795

• Loudspeakers:
• Revox BR 320
• Revox BR 430
• Revox BR 530
• Revox Symbol B
• Revox Triton B

Pictures

• Image: Revox B 780

• Extract from brochure: Revox B 780

Reports

• Audio
  • 07/1980: verdict excerpt see Revox website/link 01/2017.
  • 06/1983: Comparison test with, among others, Braun R1 Braun Atelier Series
• Stereoplay 02/1981

Links

• [B 700 series on Revox website]