I have these too and use 2 plugged together no problems at all. It depends what you have around the back of your stand, if it is masses of wires they all act as aerials picking up stray radio waves (wi-fi, mobile phone signals etc) less wires the better, the tacima has a strong mains filter built in and a shielded cable so its good at rejecting RFI.
BTW Tacima are looking at a product to stop speaker hum caused by ground loops, should be useful!
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