How to Compare the Alpine Stereo in a BMW

1. Decide on the actual receiver you are going to use in your BMW. The standard is a single-disc CD player, although you can upgrade to a CD changer, which allows you to insert multiple discs and flip through the CDs currently playing.
2. Select the amount of speakers you want installed. This usually starts off with eight speakers, although many BMW vehicles move upward to 14, depending on the size of the vehicle.
3. Specify the size of the subwoofer if you opt for one. If you love your audio, and want to augment the bass sound, you'll want to spring for the subwoofer, which is installed in the trunk of the BMW. The size of the subwoofer is going to vary depending on the vehicle you are purchasing.
4. Look at the overall wattage provided by the Alpine stereo systems in the BMW. More wattage means more power sent to the speakers, making it possible to make the audio louder without the increase damaging the speakers.