Hello, I have a 2010 Prius III with the JBL amp. I recently purchased a Pioneer Appradio 2 (SPH-DA100) head unit to replace the factory radio. I also purchased the PAC TATO wiring harness to integrate the factory JBL amp with the new HU. After everything was connected, I noticed that the back speakers are MUCH quieter than the front. Also, there is some strange "fade in" occurring with the front speakers. I added a line converter, which fixed the quiet back speaker issue but the "fade in" is still occurring. "fade in": for some reason the fade/balance is screwed up. If I direct all the sound to the back speakers, every few seconds the front speakers will kick in as well for a short period. This is very annoying. Has anyone else experienced this or have a solution to the problem? Thanks.
