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PIONEER SF-70

Technic details

Specifications

Type:
Electronic crossover network
[Channels]
2-channel:
Low range & High range
3-channel:
Low range, Mid range & High range
Rated output voltage:
3.5V
Circuit type:
NF type
5 steps of crossover switching
Slope 3-stage switching
2-3 way switchable
Divided band:
2 to 3 way, Low, Mid,
High-level can adjusted individually
Total harmonic distortion:
0.3% or less
Constant loss:
Within 2dB
S / N:
85dB or more
Input impedance:
100kΩ at 1kHz
Output voltage / impedance:
3.5mV / 200Ω or less
Load impedance:
More than 20kΩ at 1kHz
Crossover frequency 2-channel:
Low - 125Hz, 250Hz, 500Hz, 700Hz, 1kHz
High - 1kHz, 2kHz, 4kHz, 6kHz, 8kHz
Crossover frequency 3-channel:
Low-Mid - 125Hz, 250Hz, 500Hz, 700Hz, 1kHz
Mid-High - 1kHz, 2kHz, 4kHz, 6kHz, 8kHz
Slope selector:
6, 12, 18 dB / oct. (Single switching possible)
Center channel output terminal:
Impedance - 4kΩ at 70Hz
Gain - 0dB
Semiconductors used:
Transistors x 20 pieces
Diodes x 2 pieces
Power supply voltage:
AC 100V, 50 / 60Hz
Power consumption:
2W (Rated)
External dimensions (W x H x D):
300 x 115 x 254mm
Weight:
4.1kg
Year:
Around 1969

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