Purchased an X12 unit 1/26. Worked fine until 03/26. Lost all but r/f speakers. 2019 RAV4. Total of 7 speakers. R/f only treble and have to have volume almost all the way up to hear it. Ckecked factory amp fuses as well as fuse on the X12. All connections god. Reinstalled the facotry JBL and everthing is good. Trying to contact Roadanvi to find out what needs to be done about this X12. By the way. I am an ellectronic engineer and have been working on different system since 1975. I am not completely clueless.