Pioneer SF-70

Data

General

• Manufacturer: Pioneer
• Model: SF-70 (Japan version of the crossover Pioneer SF-700), see also link.

Type: Electronic crossover

• Years of manufacture: 1969 - 1972
• Made in: Japan
• Colour: Silver, wooden side panels
• Power consumption: 6 W
• Dimensions: 300 x 115 x 254 mm (W x H x D)
• Weight: 4.1 kg
• Original price approx.: 33'000 Yen (Japan, 1969), 500DM

Connections

• Number of inputs: 1

Line: 100kOhm, 1 kHz

• Number of outputs: 4
  • Low: 3.5 V, 200 kOhm, 1 kHz
  • Mid: 3.5 V, 200 kOhm, 1 kHz
  • High: 3.5 V, 200 kOhm, 1 kHz

Center channel: 4 kOhm, 70 Hz

Technical Data

• Distortion factor: 0.3%

Signal-to-noise ratio: > 85dB

• Tone control adjustment options:
  • 3-channel operation:
    • LOW-MID crossover frequencies: 125 / 250 / 500 / 700Hz / 1 kHz
    • MID-HIGH crossover frequencies: 1k / 2k / 4k / 6k / 8Khz

2-channel operation:

• • • LOW-HIGH crossover frequencies: 125 / 250 / 500 / 700Hz / 1 kHz / 2k / 4k / 6k / 8Khz
  • Edge steepness selectable:
    • Low: 6 or 12 or 18dB per octave
    • Low-Mid: 6 or 12 or 18dB per octave
    • Mid-High: 6 or 12 or 18dB per octave
    • High: 6 or 12 or 18dB per octave

Special Features

• 2- or 3-channel operation by corresponding plug-in on the rear panel
• Center channel output

Remarks

• Other models in the same series:
  • Pioneer SC-700 preamplifier
    • SC-700
  • Crossover Pioneer SF-700
    • SF-700
  • Power amplifier Pioneer SM-700
    • SM-700
  • Tuner Pioneer TX-500
    • TX-500
  • Reverb amplifier Pioneer SR-202
    • SR-202

Pictures

• Image: Pioneer SF-700

• Image: 700 series:
  • Preamplifier Pioneer SC-700

crossover Pioneer SF-700

• • Power amplifier Pioneer SM-700 (3x, bi-amping)
  • Reverb amplifier Pioneer SR-202

• Excerpt from brochure: Pioneer SC-SF-SM-700 with bi-amping illustration.

Links

• External link to website "Audio Heritage, Japan": [[1]]