The United States, the world's biggest oil consuming country, consumed 18.5 million barrels of oil per day (mbd) in 2012, which accounted for nearly 20% of the world's total oil consumption per day. The highest level of oil consumption in US history was 20.8mbd, which occurred in 2005.
It is also important to be conscious of the speakerâs sensitivity rating, measured in decibels (dB). The higher the number, the less power a speaker requires in order to reach higher volumes without distortion. For most car speakers, this number typically ranges between 88 to 92 dB.
Like home audio, speakers are the most important part of a car audio system. Speaker type, size, shape, mounting location, and power requirements are critical considerations for a car audio system. The first step should be to figure out which kinds of speakers will fit in your car. If you're interested in a complete system, consider front, center, and rear speakers as well. Keep in mind that some speakers may require a special enclosure, which tends to take up more space.