Well connected speaker interface, a total of four set of speakers, each color and line color with white bars correspond to pick a set of speakers, with white bars is positive. In the press into the left back position. Left Front. Front Right. Right rear
Power interface connection is a positive constant fire red + yellow + is positive switching power supply (connection key to the door) Black - For negative (pick blacksmith) Little Blue + display backlight power (take a small light) brown + electric. antenna control power cord.At home, then the yellow line and red to positive, black wire to the negative electrode can be used.
Input voltage 9V-14V. Optimal voltage is 12.5V. 9 volt not open with the same loud, but if a large open volume will automatically shut down.
You can of course use computers 12V power supply, computer power coil is a large loss is also large, somewhat expensive electricity! But the sound quality is very good, because the computer power supply output voltage of 11.8 volts closer to the ideal voltage 12.5 volts 4 ohm speakers with the best, some of the higher sensitivity. Since the Jetta audio output power is relatively small then only two speakers .8 best home stereo speakers can also be used in Europe, but resistance impedance off big bass part, sounds stiff .