Yes I have, thanks for responding. I adjusted the fader control to the rear and sounds like it is missing a ground or something. There is a very low sound with no tone it barely comes out of all the rear speakers but again this is turned up so load that if you adjust to the front it is almost too loud to listen to. The front speakers are much better than my 2009 RX350 but the rear not so. I have not tried any other of the new model RX's and don't want the BS from service when I discuss the problem.