Distribution of bipolar power to synth modular racks or between your synth stand alone cases has been a challenge for us. We have standardised on this 3-pin socket which with its matching plug 7212-321 as our solution. It is rated at over 2.5A so is well rated for our 1.5A power supplies. For cable, use our 3-core 7300-611 which is also rated at 2.5A.