If you have a spare car stereo in your house, that you dont want to install in your car and you want to connect it in your house, you will require a power supply that can provide constant 12 volts because all car stereos require 12 volts to turn on. Most people use a old or spare computer power supply unit because it can produce 12 volts, you can use it too. Most computer psus are about 20-25 amps, a car head unit requires about 10 amps,...
