Revox A 78

Data

General

• Manufacturer: Revox
• Models: A 78 MK I, A 78 MK II
• Type: Integrated amplifier
• Years of manufacture:
  • A 78 MK I: 1971-1974
  • A 78 MK II: 1974-1978
• Manufactured in: Switzerland
• Colour: silver, grey
• Remote control:
• Power consumption: 520 W
• Dimensions: 415 mm × 160 mm × 245 mm (W × H × D)
• Weight: 8.2 kg
• Original price approx.: 1198 DM

Connections

• Number of inputs:
  • Phono MM: 3.0 mV, 47 kOhm
  • Phono crystal: 230 mV, 800 kOhm
  • Microphone: 3.0 mV, 100 kOhm
  • Tuner: 100 mV, 100 kOhm
  • Aux: 100 mV, 330 kOhm
  • Tape Play 1, 2: 100 mV, 100 kOhm

Tape Play DIN 1, 2: 100 mV, 100 kOhm

• • Tape Monitor: 250 mV, 50 kOhm
• Number of outputs:
  • Tape Rec 1, 2: 175 mV, 50 kOhm
  • Tape Rec DIN: 30 mV, 80 kOhm
  • 2 headphones (6.3 mm jack): 5-16 Ohm
  • 2 pairs of loudspeakers

Technical Data

• Continuous power (at distortion)
  • 8 Ohm: 80 Watt (2 × 40 Watt) <0,1 % (10.00 Hz) <0,3 % in the range of 40-15.000 Hz
  • 4 ohms: 100 watts (2 × 50 watts)
• Dynamic power
  • 8 Ohm: 140 Watt (2 × 70 Watt)
  • 4 Ohm: 160 Watt (2 × 80 Watt)
• Intermodulation: <0.3%, 250 Hz/8 kHz, 60 Hz/7000 Hz (4:1)
• Damping factor: >20, corresponding to 26 dE1 at 8 ohms
• Frequency response: 20-20,000 Hz, ±1 dB
• Phono equalization: according to RIAA/IEC standard 50-15,000 Hz, ±l dB
• Power bandwidth: 10-40,000 Hz according to DIN 46500
• Crosstalk attenuation: >60 dB (1000 Hz) for all RCA inputs
• Tone control: in 4 dB steps

Bass: ±12 dB at 60 Hz

• • Treble: ±12 dB at 12,000 Hz
  • Presence filter: +3.6 dB at 2500 Hz
  • Bass filter: 12 dB per octave, -8 dB at 60 Hz
  • Treble filter: 12 dB per octave, -15 dB at 12,000 Hz

Features

• 2 headphone jacks

Notes

• Other models in the same series:
• Revox A 76
• Revox A 77
• Revox A 78

• Successor
• Revox A 78 MK II

Pictures

• Picture: Revox A 78

• Extract from brochure: Revox A 76, A 77, A 78

• Picture: Revox A 78 MK II