• Country
• Japan

• Manufacturer / Brand
• Rotel, The, Co., Ltd.; Tokyo

• Year
• 1976 ?

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 150275

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 100 or 120 or 220 or 240 Volt

• Loudspeaker
• - This model requires external speaker(s).

• Power out
• 80 W (110 W max.)

• Material
• Wooden case

• from Radiomuseum.org
• Model: Integrated Stereo Amplifier RA-712 - Rotel, The, Co., Ltd.; Tokyo

• Shape
• Book-shelf unit.

• Dimensions (WHD)
• 430 x 140 x 330 mm / 16.9 x 5.5 x 13 inch

• Notes

• A hi-fi stereo integrated amplifier with power output of 2 x 40 watts RMS into 8 ohms.  Rotary controls for Bass, Treble, Volume and Balance, With Left and Right Power Output  Meters, rotary switches for Speakers (1, 2, 1+2) and Function (Tuner, Phono, Aux). press buttons for Power, Tape Monitor (1, 2, Dub),  Low Filter and Loudness, RCA phono sockets for Phono MM, Tuner and Aux input and for Tape Monitor 1 input/output, an alternative DIN socket for Phono MM input and a DIN socket for Tape Monitor 2 input/output, terminals for 2 pairs of loudspeakers, 2 switched AC outlets (not available on UK and Scandinavian models) and a jack for Headphones. The pre-amplifier and power amplifier stages can by separated by the removal of the two jumper pins from the RCA phono sockets marked Pre-Amp Out and Main Amp In.

  Specification
  Power Amplifier Section
  Continuous Power Output	55 watts per channel, min. RMS, both channels driven into 4 Ω with   no more than 0.4% total harmonic distortion or 40 watts per channel, min. RMS both channels driven into 8 Ω with no more than 0.5% total harmonic distortion from 20 to 20,000 Hz
  Intermodulation Distortion	Less than 0.2% at rated output
  Frequency Response	5 to 95,000 Hz ±3dB at 1 watt per channel
  Input Sensitivity/Impedance	900mV/33kΩ
  Damping Factor	50 at 1kHz
  Pre-Amplifier Section
  Output Voltage	900mV (rated), 1.8V (maximum)
  Harmonic Distortion	Less than 0.08% at rated output voltage
  Frequency Response	10 to 50,000Hz ±1dB
  Signal to Noise Ratio (IHF, 'A' closed circuit network)	PHONO 1,2        75dB Tape, Aux. Tuner 94dB Residual             0.5mV
  Input Sensitivity/Impedance (Rated output at 1kHz)	Phono                2.5 mV/47kΩ Tape                  150 mV/50kΩ Aux, Tuner         150 mV/50kΩ
  Output Level	Tape out (RCA)   350 mV/3.3kΩ Tape out (DIN)     60 mV/60kΩ
  Phono Equalization	RIAA STD ±0.5dB
  Lower Filter	12dB/oct at 40Hz
  Crosstalk	45dB (overall)

  Versions/Power Requirements
  100/120/220/240 V AC 50-60Hz Switchable

  Power Consumption:  380 watts max.

  Stereo-Verstärker, 2 x 55 Watt Sinus/4 Ohm, max. Klirrfaktor 0,4%; 5-95.000 Hz.

• Net weight (2.2 lb = 1 kg)
• 11 kg / 24 lb 3.7 oz (24.229 lb)

• Source of data
• -- Original prospect or advert

• Literature/Schematics (1)
• - - Manufacturers Literature (Technical Manual for the RA-712 dated Dec 76)

• Literature/Schematics (2)
• - - Manufacturers Literature (Owner's Manual for the RA-712)

• Author
• Model page created by Franz Scharner. See "Data change" for further contributors.

• Other Models

• Here you find 338 models, 327 with images and 32 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Rotel, The, Co., Ltd.; Tokyo