Pioneer SX-1250

Data

General

• Manufacturer: Pioneer
• Model: SX-1250

Type: Receiver

• Years of manufacture: 1976 - 1978
• Made in: Japan
• Color: front silver, wooden cabinet
• Remote control: no
• Power consumption: 1'200 W max.
• Dimensions: 556 x 186.5 x 464.5 mm (WxHxD)
• Weight: 29,2 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: 6.5 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 FM Det Out (4 Channel):

• • 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: 2 x 160 W RMS (20 - 20,000 Hz, 0.05 %).
  • 4 Ohm: 2 x 200 W
• Dynamic power:
  • 8 Ohm:
  • 4 Ohm:
• Total harmonic distortion: < 0.1%
• Attenuation factor: 30 (at 8 Ohm)
• Frequency response:
  • Phono: 30 - 15,000 Hz, ± 0.2 dB.

High Level: 10 - 50,000 Hz (+0 dB, -1 dB)

• • Power Amplifier: 5 - 100,000 Hz

Signal-to-noise ratio:

• • Phono: 75 dB

High Level: 90 dB

• • Power amplifier: 100 dB
• Tone control:
  • Bass:
    • 50 Hz: ± 5 dB
    • 100 Hz: ± 10 dB

Treble:

• • • 10 kHz: ± 10 dB
    • 20 kHz: ± 5 dB
• Loudness: yes, +6 dB at 100 Hz, +3 dB at 10 kHz
• Low Filter: yes, 12 dB / octave at 30 Hz
• High Filter: yes, 12 dB / octave at 8 kHz
• Mute: yes, -20 dB

Tuner

• Reception: UKW/MW
• Frequencies:
  • FM: 88 - 108 MHz
  • MW: 535 - 1605 KHz
• Input sensitivity:
  • FM: 1.5µV
  • MW: 15µV
• Frequency response: 30 - 15,000 Hz (+0.3 dB, -1 dB)
• Distortion factor:
  • FM, 1 kHz: < 0.1% (mono), < 0.2% (stereo).
• Signal-to-noise ratio:
  • FM: 80 dB (mono), 74 dB (stereo)

MW: 55 dB

• Channel separation: 50 dB (1kHz)
• selectivity: 83 dB
• Co-wave selection: 1.0 dB
• Spurious wave selection:
  • FM: 83 dB

MW: 40 dB

• Image frequency attenuation:
  • FM: 110 dB
  • MW: 65 dB
• IF attenuation:
  • FM: 120 dB
  • MW: 85 dB
• AM suppression: 60 dB

Special Features

• Pre- and power amplifier separable (Main In/Pre Out)
• Microphone (6.3mm jack)

Remarks

• Black version:
  • Pioneer SX-5590

• Other models in the same series:
• Pioneer SX-450
• Pioneer SX-550
• Pioneer SX-650
• Pioneer SX-750
• Pioneer SX-850
• Pioneer SX-950
• Pioneer SX-1050
• Pioneer SX-1250

• The SX-1250 is the largest receiver in the SX-x50 series.

Pictures

• Picture: Pioneer SX-1250

Reviews

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

Links

• External Link: "Hifi Archive" website: [2]

• External link: "Hifi Studio" website: [3]

• External link: "Pioneer Vintage" website: [4]

• External link: "Classic Audio" website: [5]