Holm-zie baby, Your options have been stated over and over again. They range from (1) changing the wire between the DIN plug and the box, which was your original question to (2) changing the wires and then experimenting with different ICs to find out what ICs between box and phono stage sound best to you (Dover's idea). Then you could purchase a DIN to RCA IC to replace the box. To (3) ditch the box and just buy a good quality DIN to RCA IC to go from tonearm to phono stage. There are no other possible answers, no matter how many audiophile websites you may query. Choose one and good luck.
Raul and Mijostyn do have a point; the thread got stupid when we started going round and round over the same limited number of choices. That is in part because you have acted like none of the responses are helpful, enough. If you want a different response, ask a different question.