The following lines were added (+) and removed (-):
[[File:woofer.jpg]]The foam flex ring surround may deteriorate with age and may be replaced without the need to replace the entire woofer. This requires a little cutting, scraping, cleaning, and careful application of a new foam surround using adhesive. [[File:wooferpartsrefoam.png]]7. Once dry time is observed, prepare the speaker cone for the gluing of the outer foam ring. You will press lightly and flex the cone while you observe the movement of the foam ring. You don't want to glue the outer part of the foam ring in such a way that it restricts movement of the cone or you will negatively impact the performance and sound of the woofer. This step is known as exercising the cone and will allow you a sense of the range of movement of the outer ring. The foam ring will move inward and outward by slight expansion and contraction. Observe the mid point in this movement. We want the foam ring to reside at this mid point when glued so that the foam ring serves to allow equal and full range of movement when the speaker is operational. The ideal spot will ensure there is no contact scraping of the voice coil during movement.7. Once dry time is observed, prepare the speaker cone for the gluing of the outer foam ring. You will press lightly and flex the cone while you observe the movement of the foam ring. You don't want to glue the outer part of the foam ring in such a way that it restricts movement of the cone or you will negatively impact the performance and sound of the woofer. This step is known as exercising the cone and will allow you a sense of the range of movement of the outer ring. The foam ring will need to be centered based on movement of the cone rather than visually by its position on metal frame. Observe the position the foam ring resides on the frame when the cone moves without scraping on the voice coil. We want the foam ring to reside at this place when glued so that the foam ring serves to allow equal and full range of movement when the speaker is operational. The ideal spot will ensure there is no contact scraping of the voice coil during movement. You may notice that the foam ring does not visually appear perfectly centered within the metal frame, however, what is more important is that it is residing where cone movement is centered and correct.* hard black plastic ring - if the speaker has a hard plastic trim ring on the frame remove it and keep it to reuse. * graphite cones be careful - some speakers have graphite cones which crack easily, like some Pioneer brand woofers. Be extra careful when pressing on them, use minimal force.