Reply To: BS9000 + BL3 = buzzing and high pitched noise February 28, 2023 at 5:23 pm #16841 MillemissenGOLD Member Flensborg/DanmarkTopics Started 12Total Posts 460 If the problem is only in one of the PL outputs – you wrote ‘the left most PowerLink port’ – you could try to use a powerlink splitter from the other one. MM