converter

Hello all. Haven't posted in quite some time. Been busy. Getting my services through Lexus of Monterey. Anyway my '11 has roughly 177k on the odometer and has been running without so much as a hiccup until I noticed about six months ago a faint rattling underneath the car. Intermittent and...

I tried searching and couldn't find definitive answer. Does the HU on the base 6 speaker system have preamp outputs? I want to install a new amp and don't know if I can get a clean signal out of the stock HU. I don't want to replace the HU because of the integrated controls, etc. I tried...