Pioneer SX-1280

Data

General

  • Manufacturer: Pioneer
  • Model: SX-1280
  • Type: Receiver
  • Years of manufacture: 1978 - 1980
  • Made in: Japan
  • Color: front silver, wooden cabinet
  • Remote control: no
  • Power consumption: 1'000 W max.
  • Dimensions: 556 x 186 x 461 mm (WxHxD)
  • Weight: 28.7 kg
  • Original price approx.: 950 US-$, 3'498 DM


Connections

  • Number of inputs:
    • Phono 1, 2: 2.5 mV, 50 kOhm, max. 500 mV at 1 kHz.
    • Microphone: 7.5 mV, 50 kOhm

Aux: 150 mV, 50 kOhm

    • Tape Play 1, 2: 150 mV, 50 kOhm

Tape Play DIN: 150 mV, 50 kOhm Dolby NR Adapter: 150 mV, 50 kOhm

    • Antenna FM/MW: 75, 300 Ohm / 300 Ohm
    • Main In: 1 V, 50 kOhm
  • Number of outputs:
    • Tape Rec 1, 2: 150 mV
    • Tape Rec DIN: 30 mV, 80 kOhm

Dolby NR Adapter: 150 mV

    • Pre Out: 1 V, 1 kOhm
    • Headphones (6.3mm jack):
    • 3 speaker pairs


Technical Data

Amplifier

  • Continuous power (at distortion):
    • 8 Ohm: 2x 185 W
    • 4 Ohm:
  • Dynamic power:
    • 8 Ohm:
    • 4 Ohm:
  • Total harmonic distortion:
    • Rated power: < 0.05%
    • 90 W/channel: < 0.01%
  • Attenuation factor: 30 (at 8 ohms)
  • Frequency response:
    • Preamplifier (Phono): 20 - 20,000 Hz, ± 0.2 dB.
    • Preamplifier (AUX, Tape): 5 - 80,000 Hz (+0 dB, -1 dB)
    • Power amplifier: 5 - 100,000 Hz (+0 dB, -1 dB)

Signal-to-noise ratio:

    • Phono: 80 dB
    • AUX, Tape: 95 dB
  • Stereo channel separation:
  • Tone control:
    • Bass: yes
      • 50 Hz, ± 5 dB
      • 100 Hz ± 10 dB
    • Treble: yes
      • 10 kHz ± 10 dB
      • 20 kHz ± 5 dB
  • Loudness: yes (+6 dB at 100 Hz, +3 dB at 10 kHz))
  • High Filter: 8 kHz (12 dB/octave)
  • Low Filter (Subsonic): 15 Hz (12 dB/octave)
  • Mute: yes (-20 dB)
  • Direct/Line-Straight: yes (Tone off)


Tuner

  • Reception: FM/MW
  • Frequencies:
    • FM: 88 - 108 MHz
    • MW: 535 - 1605 KHz
  • Input sensitivity:
    • FM: 1.7µV
    • MW: 15µV
  • Frequency response: 30 - 15,000 Hz (+0.2/-0.5 dB)
  • Distortion factor:
    • FM (1 kHz): < 0.10% (mono), < 0.15% (stereo).
  • Signal-to-noise ratio:
    • FM (65 dBf): 80 dB (mono), 71 dB (stereo).
    • MW: 55 dB
  • Channel separation: 50 dB (1 kHz)
  • selectivity:
  • Co-wave selection: 1.0 dB
  • Spurious wave selection:
    • FM: 80 dB
  • Mirror frequency attenuation:
    • FM: 90 dB

MW: 40 dB IF attenuation:

    • FM: 110 dB
    • MW: 40 dB
  • AM suppression: 55 dB


Special Features

  • Pre- and power amplifier separable (Main In/Pre Out)


Remarks


Pictures

  • Image: Pioneer SX-1280

Pioneer SX-1280-1.jpg


  • Image: Pioneer SX-1280

SX 1280.jpg


Reports

  • External link: Good Old Hifi website: [1]


Links

  • External Link: "The Vintage Knob" website: [2]
  • External Link: Pioneer Vintage website: [3]
  • External Link: Classic Receivers website: [4]