Integrated Stereo Amplifier RA-1212

Roland Electronics Co. Ltd., Rotel; Tokyo

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  • Year
  • 1976 ?
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 150290

 Technical Specifications

  • 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
  • 140 W (200 W max.)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Integrated Stereo Amplifier RA-1212 - Roland Electronics Co. Ltd.,
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 430 x 140 x 380 mm / 16.9 x 5.5 x 15 inch
  • Notes

  • A 2 x 70 watt integrated hi-fi amplifier. Connections for two pairs of loudspeakers (1, 2). Press button for Power. Rotary controls for Bass, Treble, Volume and Balance. Rotary switches for Bass Turnover (400Hz, 200Hz, Defeat), Treble Turnover (4kHz, 2kHz, Defeat), Function ( Phono 2, Phono 1, Tuner, Aux1, Aux2), Speakers (Off, 1, 2, 1+2, Speaker 4ch), Tape Monitor (1 > 2, 1 Play, Source, 2 Play, 2 > 1) and Mode (Reverse, Stereo, Left, Right, L + R (mono)). Switches for Filters (Subsonic, Low, High), Loudness and Muting. Power on Pilot light.  Jack for headphones. Removal of the two jumper pins between Pre Amp Out and Main Amp In on the back enable the Pre-amplifier and Power Amplifier to operate separately.

    Power Amplifier Section :
    Continuous Power Output :
    70 watts per channel, min. RMS both channels driven into 8 ohms or
    100 watts per channel, min. RMS both channels driven into 4 ohms
    from 20Hz to 20kHz with no more than 0.3% Total Harmonic Distortion
    Harmonic Distortion .............:  0.3% at rated power output 20Hz to 20kHz
    Intermodulation Distortion ....:  0.05% at 1kHz, rated power output -1dB
    Frequency Response ......... :  4Hz - 100kHz, - 1dB at 1 watt per channel
    Damping Factor ................. :  70 at ± 10%
    Input Sensitivity/Impedance  :  980mV/33kΩ
    Speaker Impedance ........... :  4 to 16Ω, 1, 2 ; 8 to 16Ω, 1 + 2

    Pre-Amplifier Section :
    Output Voltage/Impedance ..:  980mV/100Ω 2V maximum
    Harmonic Distortion ............:  < 0.08% at rated output voltage
    Frequency Response ......... :  3Hz - 50kHz, ± 1dB  
    Signal to Noise Ratio :
      Phono 1, Phono 2 ............:  > 75dB
      Tape, Tuner, Aux1, Aux2 ...:  > 95dB
    Input Sensitivity/Impedance:
      Phono 1, Phono 2 ............:  2mV, 4mV, 8mV / 30kΩ, 50kΩ, 100Ω Adjustable
      Tape, Tuner, Aux1, Aux2 ..:  150mV/50kΩ
    Output Level Tape Out ........:  270mV/2.7kΩ RCA Jack ; 60mV/80kΩ DIN Jack

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

    Semi-Conductors used :
    38 transistors, 14 diodes.

    Stereo-Verstärker, 2 x 100 Watt Sinus/4 Ohm, max. Klirrfaktor 0,3%; 5-100.000 Hz.

  • Net weight (2.2 lb = 1 kg)
  • 13 kg / 28 lb 10.1 oz (28.634 lb)
  • Source of data
  • -- Original prospect or advert
  • Literature/Schematics (1)
  • - - Manufacturers Literature (Owner's Manual for the RA-1212)
  • Literature/Schematics (2)
  • - - Manufacturers Literature (Technical Manual for the RA-1212)
  • Author
  • Model page created by Franz Scharner. See "Data change" for further contributors.

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