How to measure speaker diameter

Maybe you blew your speaker, and you want to replace it, or perhaps you are thinking about upgrading it soon and yet you don’t know its size. To be able to buy a new speaker it is necessary that you be sure of the size you are going to need particularly the diameter. Don’t be in a rush to purchase that new speaker only to find that it does not fit.

There are a couple of factors you should consider before choosing the right speaker, and one of them is the diameter. If you are not sure of the diameter, this guide will explain to you how to measure speaker diameter accurately. The speaker diameter is the measurement of the outside diameter of the speaker frame minus any mounting lugs. Unless you want to re-configure the speaker mounting arrangement to accommodate a larger diameter, you should know the speaker diameter. The size of the speaker determines the diameter. For example, a 6-1/2 inch speaker is 6-1/2 inches in diameter.

Different Speaker Diameters to Measure

Outside diameter. This measurement will include the front length of the speaker from one side to another side. There is also the magnet diameter. All speakers have a magnet attached to the back of the speaker. However, the size of the magnet differs from speaker to speaker. Magnet diameter measures the diameter of the magnet from one side to the other. Lastly, there is the cutout diameter for speakers that have two layouts. It is the measurement of the width of the speaker just below the front outside of the speaker. It should always be less than the outside diameter.

The Measurement

You are going to need a tape measure, a notepad, pen or pencil, screwdriver and plenty of working space. The first step is to unscrew the speaker and place it on a flat surface. Start measuring the outside diameter. Hold one end of the tape to one end of the speaker and extend it to reach the other end of the speaker. Always try to keep the tape close to the center so that the new speaker fits perfectly to the mounting depression. Note down the outside diameter measurement on the notepad. And proceed to measure following the same process the magnet and cutout diameter and note down their results too.

Measuring the speaker diameter is vital if you’re to buy the right size of the speaker. Like we have earlier said, the size of the width equals the size of the speaker. So if you know what your speaker size is finding a similar one would not be difficult. Knowing the diameter of the speaker is just but the first step to purchasing the right speaker. You also need to measure other parts of the speaker. Such as the mounting depth, the speaker height and the distances between holes. There are other speaker characteristics that after measuring your speaker, you should consider. That includes the cone material which is the material that the speaker is made from, surround material which is the material that attaches the speaker cone to the frame, magnet weight, the heavier the magnet, the more efficient and the shielding which ensures that the speaker magnet does not interfere with electronic equipment nearby.