All Three IR Emitters Not Needed
From X10Wiki
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Questions
Do I have to attach all three IR emitters to my VCR?
No, all 3 VCR Commander IR emitters are not needed. We recommend that you attach only one of them to your VCR. Position it 1 inch to the left or right of your VCR's IR input sensor (the sensor that receives the signals from your VCR remote).
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