I am in the US. I am going crazy trying to find out what is the wiring of my ES300. I would assume that it is similar to the GS. It seems so. Does anyone know how I can get in contact with PERCY??? an email addess or sumthing? He seems to have helped a lot and I need all I can get. I need the wiring color codes for the premium audio system. I can see from the responses that the front tweeters have a capacitor rolling off the bass but are the mid-woofers grounded to the car and what are the wires comming from the amp? I just want to keep the factory radio and install another amp to to speakers so I just need to find the speaker wires for front and back. My Email is nce2tuch@quixnet.net......PLease HELP?????