Step 1- Determine the size you'll need.
Check your vehicle specs to see what size speakers you'll need. Be sure to check the speaker's mounting height or tweeter protrusion so that door panels and grills fit in place after the installation.

Step 2- Choose the right speakers for your system.
Factory Radio- If you plan to drive your speakers with a low-powered factory receiver, you need highly-efficient speakers. Check out the speaker sensitivity to find the most efficient speakers for your vehicle. If you use your factory receiver, get speakers with an RMS power rating of 2-5 watts.

Amplifier- When using an amplifier, make sure its RMS wattage is within your speakers' power range. High-power amplifiers can power most speakers.

Step 3- Choose the type of speakers you want.
2-Way Speakers- Most speakers are 2-ways, or coaxials with a single tweeter mounted above the cone of its woofer.

3&4-Way Speakers- A 3-way (triaxial) adds a midrange driver for improved clarity. A 4-way adds a supertweeter for even more detailed high frequencies.

Component Speaker- The separate woofers, tweeters, and crossovers with components give you better power and performance than coaxials. You can improve the imaging in your car depending on mounting location. They usually can't be installed in factory locations.