Editing Radio Installation (section)

===Front vs Rear Speakers===
The two factory fitted speakers (behind the seats) are connected to the "rear" speakers on the ISO connector. The "front" speaker connections are not wired. Good or bad design aside, if your radio has four or more outputs then you will naturally get something connected (rear to rear). If your radio has two speakers outputs then make sure they go to the rear's in the ISO plug. IMPORTANT, if your radio has a bluetooth phone module then there is a good chance that the phone conversation only comes out of the front speakers as the rear passengers don't need to hear your call. Some radios (kenwood?) allow you to configure this, others (pioneer?) don't. So if you fit a four speaker radio to an S1 elise without modification then your music will work but the phone audio probably won't. To remedy this you have to pull the pins from the ISO connector and swap the front and rear speakers making sure to keep left and right the same. Following the wiring diagram in the installation instructions for your head unit. Swap the wires on the plug on the radio adapter NOT on the elise loom, it's easier, way less confusing, and keeps the car original. Do this BEFORE you wire up the handbrake sensor so it can be done outside of the car in better light etc.