I have a 2002 infiniti qx4 with bose system. I read online that to install a f90bt or most any aftermarket headunit you need a nissan/infiniti high to low converter with adjustable gain control for a 02 qx4 with bose system.

My friend owns the car stereo shop who got me the radio and who is doing the install and says you do not need this.

I was wondering anyone with a 02 pathfinder or 02 qx4 with bose system do you need a high to low converter to integrade the bose amps or not?

Thanks for your help in advance.