You old surround may be broken, dry rotted, torn or just worn out. The speaker may have lost its bounce/spring. Does the surround feel sticky?. The surround needs to be replaced. The surround is made of latex and clay and lasts about 9 to 14 years. no matter what you do , it will go . You need SURROUND REPLACEMENT
This is the technique that involves removing the foam, or rubber from the outside edge and replacing it with new material.
We must remove old edge , clean frame,remove dust cap, re-center Voice coil, install new edge material . Let it cure, test and re install dust cap.
ALL SPEAKERS MUST PAST THE SWEEP TEST AND A MECHANICAL TEST BEFORE SHIPPING
1.For shipping, Sending the enclosures is not necessary. We recommend you remove your speakers from the enclosures
2. The best way to ship your speaker is to pack each speaker in a separate box. The boxes should be thick and sturdy, and 2 to 5 inches larger than the speakers.
3. Please tape a piece of cardboard over the front of each speaker and then wrap it in BUBBLE pack (at least 2" thick). DO NOT SHIP IN FOAM PEANUTS. Because speakers are very heavy, foam peanuts will compress during shipping and when your speakers arrive to us they will be loose in the box. Bubble pack will not compress like foam peanuts.
4. If you wish to pack both speakers in the same box, please first pack each one in a separate box and then pack those two boxes inside the larger box. This protects the speakers from shifting during shipping and ending up inside of each other and damaging the cones. Make sure you use lots of bubble pack and only pack 1 speaker per box.
5. Make sure the bubble pack is wrapped completely around all parts of the speakers (at least 2" thick, which may take several layers of bubble pack). Also be sure your speaker is tight in the box and can not move around at all. Shake the box hard to be sure!