As long as he's paying, I'll sign up for duty
Xenia & Isabelle, totally in love!
'T SQiekenkot: VOLVO 740GL 2.3
CarPC: none at the moment
CLARION APA4300HX => Fountek NeoCd1.0 + TB W4-1337SD
CLARION APA4300HX => CSS Trio8
CLARION APA2100 => Dayton IB385-8
Not trying to make fun of you, but you are pretty much setting us up for it.
Also, it may not matter but why would you need to know this?
Thats easy. Just get into your car. Insert the key into the ignition and turn on the car. While the radio is on, put the radio at full volume (clockwise) thats 100% volume. If the radio doesnt have tactile clicks then you can mark the peak with a marker. Then count the number of rotations or clicks while reducing volume (conter-clockwise), untill you reach the point you are at 0% volume.
I dont know why you guys are giving the OP such a hard time. I mean this is totally a legitimate question on a site dedicated to carPCs.
"In the beginners mind there are many possibilities, but in the experts mind there are few."- Shunryu Suzuki
"Do it right or don't do it at all"
[-------90%-] (New Car=New Build)