I have a 06 Corolla LE with a JBL 6-disc in dash cd changer with 8 speakers from the factory. I never tried it but love to have it. Where did you bought your E7009 navigation system?
I was going to purchase one thru either OEM value or E-Bay, I was told by OEM value that he never saw one installed in a corolla and didn't think it would fit correctly so I bought a Magellan.
I think I will do more research on that. Based from the Toyota/JBL website, I have a digital amplifier. I have to do more research on the wiring diagram with that.