Car speakers

A couple of weekends ago i installed a new audio deck for the car i just got. Now the next step was to get speakers to replace the 16 year old blown out stock speakers. The first step was to remove the door panel to get to the speakers. The old speakers, as you can see in the picture, were blown out and the cone was no longer attached to the outer edge of the speaker like it should be. Replacing the speaker was as easy as unscrewing the old one and screwing in the new one. The two speaker wires were striped and connected to the corresponding positive and negative feeds on the new speakers. The new speakers i bought also came with tweeters. To install these i had to drill a whole into my door panel then wired the positive and negative wires for the tweeter. Both speakers have the same components; a permanent magnet, an electromagnet that is pulled and pushed by the permanent magnet when a current pass through the wires, and a cone to increase the surface area that pushes the particles of air. The tweeter is smaller and is used for the higher frequency sounds. higher frequencies have more vibrations per second so the smaller area of the tweeter is able to vibrate faster to produce the higher treble pitches well. The other speaker has a medium size cone and is used for mid range frequencies. The larger area of the cone allows for more air to be pushed and at lower frequency than the tweeter to produce the mid to low bass range sounds. After i put everything back together the new speakers sounded great. Now all i need is a sub-woofer to get some real bass.