I'm looking for recent information about upgrading the audio equipment in my 2012 Highlander Base model without JBL and Nav. I would like to use the existing backup camera, not interested in either Apple or Android Play functions, Bluetooth capability is sufficient. I have looked extensively at Crutchfield's offerings; I have been buying from Crutchfield since the 1970's and always pleased with their products and services (yeah, I'm that old). But I would like to learn from those who have firsthand experience with what I would like to do; what other options might be available to to me, both equipment and tech-wise. One more thing: because I'm really old-school, I want a unit with a real volume control knob! Your input will be appreciated!