YF (2011-2014) Sonata/i45
I have a 2013 Sonata, and the factory sound system works fine. I'm trying to hook in a sub-woofer (which worked fine in a previous vehicle) to the speaker lines in the Sonata. It seems odd that the rear door speaker lines are only providing me with 0.2 V (yes, 200 millivolts) when cranked up...