How To Measure Oval Speaker Size. Rather, the measurement is based on the diagonal length of the speaker frame. Once you have your speaker measurements, determine the size you need by comparing it to the available speaker sizes.
Stay away from perfect cubes when determining speaker dimensions. Whatever you measure should come close to one of the general speaker sizes: Not sure what size speakers you have?
If you have only mounting holes as the rough measurement idea, make sure you measure it correctly.
Bevel each hole to keep the gelcoat from cracking. Once you have your speaker measurements, determine the size you need by comparing it to the available speaker sizes. Measuring for a recessed mount. Use the speaker box designer to determine the correct speaker box enclosure volume for your driver determine the dimensions of your speaker box based on.