Let me preface by saying I love Sony stuff (not speakers), all my home theatre components are Sony, and i have a Sony Mobile ES head unit in my car. However, in my experience (and that of my car audio installer) Sony car audio head units don't put out a powerful enough signal for use in a an amplified component system. I have to have the levels turned all the way on my amp just to get a loud enough signal to sound good. My installer (very reputable and well known) doesn't like to work with sony head units for this very reason. My mobile es unit is older but when it came out it retailed for around $1,100. In my opinion I would go for something else. Im replacing my unit with a Nakamichi unit if my damn car is ever cured of its suspension malaise.