How To Measure Speaker Size For Replacement. What you need to measure is the diameter of the main circle of the speaker in which it becomes the main part that produces the audio. Figuring out car speaker sizes can be a little confusing.
This is the distance from the bottom of the mounting flange of the speaker to the highest speaker position. Measure the speaker mounting depth. Type the speaker model number into the search box at the top of this page and press enter.
This is the size of the circle that you usually see upfront.
To get the diameter, you should measure the distance between a screw and its opposite. Measurement of the magnet’s height; This is the size of the opening required for the speaker, where even the basket falls below the flange of the speaker. Start measuring from the bottom up to the flat metallic or plastic piece around the cone (the mounting frame).