I have this speaker, whose power is between 10 and 12 W. The diameter is about 21 cm. The issue is that it has a broken membrane, and I can't prove it correctly. As a general rule, what I would like to know is if the diameter determines the inches, and if according to the size it can be determined with a certain approximation if it is a tweeter or a woofer, beyond which the first reproduces the treble and the second the bass .

Hello friend Faradio75 the diameter of the speakers are measured in inches in the case of which you refer is 8 inches and it is most likely the woofer if there is no other larger one in the equipment. Greetings from Valledupar Colombia.