I know on the 3G TL's the signal out of the headunit going to the ELS amp is full range and pretty flat. The headunit controls all of the HFL and nav voice information too so signal can be taken between the headunit and amp and is pretty useable.

Does the 4G TL ELS system behave the same way? Or do I have to use a processor after the factory amplifier? I am trying to get my ducks in a row for an install I'll be doing in the next couple of weeks.

TIA

 

good question, is the signal fixed range from the headunit to the amp?