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SI-2 series of automatic speakers switches allows two different audio amplifiers
(i.e., a stereo television and a hi-fi system) to be connected to a single
pair of loudspeakers. The SI-2 detects which source is delivering a signal
and routes the signal to the speakers. This eliminates the need for extra
speakers and/or running the stereo TV through the amps auxiliary input.
The SI-2 is designed so that if both signals are present, the SI-2 will
give priority to the amplifier on the Television connection. The SI-2 can
be used in home systems where a local hi-fi system or TV will override
a complete home audio system. In this application the whole house will
fill with music, but when someone goes into a particular room and uses
a local audio source, the SI will lock out the full house system when the
local system is turned on. For added stability, the SI-2 features a video
trigger connector which allows the SI-2 to be triggered to the B input
by sensing the presence of a video signal.
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What about car installations?
The SI is designed to be operated on 12 volts DC. This allows installations
in automobile and marine applications running the SI off the battery. Simply
remove the wall adapter supplied and connect into the DC battery power.
SI-2 Electrical Specifications
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| Power Requirements |
12 vdc, 100mA (power supply included) |
| Sensing Impedence |
20,000 ohms min. |
| Signal Sensitivity |
Adjustable to allow for system noise |
| Switching Time A to B |
0.1 seconds |
| Switching Time B to A |
Adjustable for 2 to 35 seconds |
| Priority |
A signal on the Video B will override the A input |
| Buy the
SI-2 |
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| Shipping Weight:
2 lbs |
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