Solved! Help with my Sony str-k840p

Nov 7, 2021
Hello everyone , im having troubles setting up my receiver , i got it as a gift but the speakers and subwoofer are from a rca rt2906, my problem its that the subwoofer only has wire leads and the receiver has a rca for the connection , can the subwoofer be used in this device ? Or i need to buy another sub or can i get something to make it work ?

Best regards and thanks for your help