1aespinoza 10+ year member
Junior Member
Voltage= square root of Watts x OhmsOr is it more complicated than that?
125= 11.18
11.18 x 4 Ohms = 44.72 AC volts
The reason 3/4 headunit volume is chosen is because after that, most radios start to distort.
So if your gain was set to 125w, then that is what the amp will play at 3/4 radio volume.