Sonincs 600x/bryston 5b



Howdy folk, new but have been looking. I have recently acquired two sonics 600x amplifiers. To my understanding, from what little info that is on the web, these are rebranded bryston 5b. Would like to hook these up using the yamaha rx v659 pre outs and feed each polk rtia 9 with one amp per speaker. The back of the amp has two xlr one marked cross over input which is a female. The other xlr is a male and marked LF output. Also two sets of binding posts. Output A are red and white and output B are red and black. This stuff is new to me, use to standard rca plug and play sorta speek. Any help info on the amps and going about

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