Audio Database

SF-70
Commentary

An electronic crossover network in which crossover points and slopes can be freely selected.

2-way and 3-way can be used by switching the switch.

The crossover frequency can be adjusted to 5 levels of high and low, and can be freely selected according to the speaker.
In addition, the slope can be selected in 3 stages at 4 positions.

It is equipped with a center channel output jack that mixes low range L and R, allowing 3D playback.

Model Rating
Type Electronic crossover network
Circuit system NF Type
Crossover 5-step switching
3-step slope switching
2-3-way switchable
Rated output voltage 3.5V
Split band For 2-3-way, Low, Mid
High Each individual level can be adjusted
Total harmonic distortion factor 0.3% or less
Constant loss Within 2 dB
S/N 85 dB or more
Input impedance 100k Ω
Output impedance 200 Ω or less
Crossover frequency Low : 125, 250, 500, 700, 1000 Hz
High : 1, 2, 4, 6, 8 kHz
(5-step switching for each)
Cutoff characteristic 6, 12, 18dB/oct.
(Independently switchable)
Center channel output terminal Impedance 4k Ω / 70 Hz
Gain 0dB
Semiconductor used Transistor : 20 Nos.
Diode : 2 pcs
Power supply voltage 100 VAC, 50Hz/60Hz
Power consumption 2W (rated)
6VA
External dimensions Width 300x Height 115x Depth 254 mm
Weight 4.1kg