Voltage level for headunit 2010 no navi?

[GunMetalGTI]

Im running a solid quality line out. Ive always had to jack up gains on any amp i have run with this car. Just wanted to knkw jf anyone else had the same experience or if its me or do these headunits put out some low volts.
Im probably getting an aftermarket unit soon but i really wanted to throw this out there because its just weird for me to run with the gain all the way jacked although i know its about signal and not necessarily too much power. Any input would be helpful.
Thanks
Dave

 

[GunMetalGTI]

This was just a question for to pick the brain. I thought I read somewhere that the input was pretty low....almost .2 volts or so. I got everything dialed in but I just wanted to be sure it was the head unit. You can even see how at half volume the unit doesn't really put out much in terms of level. You really only get a louder volume when 75% of the bar is filled if that makes any sense......basically saying...the volume output just kicks in quite late then jumps up a lot more towards the end.