- #2
- Publié par
oldamp le 09 Nov 2013, 22:33
reconer un HP n'est pas une opération simple, il faut acquérir un bon coup de main, donc comencer par détruire un bon nombre de HP ! le plus difficile n'est pas tant de "reconstruire" le HP que de le démonter proprement. le plus facile est de remplacer une suspension externe déchirée ou de réparer de petites déchirures sur le cone. recoller le spider vers la bobine est déja plus délicat car l'accès n'est pas facile pour nettoyer l'ancienne colle et mettre la nouvelle et maintenir le tout serré et centré pendant la prise.
A/ Repairing a Damaged Speaker Cone
If a speaker cone has a small tear in it, it will cause a buzzing sound in the speaker. These small tears can be repaired without having to recone or replace the speaker. Doing so is much like using the paper maché that kids use to make piñatas. Use tissue paper for the paper and slightly watered-down white glue for the paste. Several layers will need to be added to both the front and back sides of the speaker. Allow the glue from each layer to become tacky before applying the next layer. It is important to avoid allowing wrinkles in the tissue, as they can cause buzzing sounds.
Once fully dry, the speaker cone can be painted to hide the repair. This will not affect the speaker’s sound.
B/ Reconing a Damaged Speaker
When speaker cones have serious damage, they need to be reconed. This involves removing the old cone, cone edge, spider, and gasket and replacing them with new ones. This is a multi-step process that requires patience.
1. Start by measuring the old speaker cone to find out what size to buy in order to replace it. The speaker’s diameter, depth, and coil diameter measurements are all needed.
2. Unsolder the wires running from the speaker’s coil to the terminals on the back of the speaker. It is not necessary to remove the solder, but merely to melt it enough to remove the wires.
3. Cut out the speaker cone around the edge with a craft knife. Cut the spider as well. The old speaker cone should now come out freely.
4. Cut out the gasket by sliding the craft knife between the bottom of the gasket and the speaker’s metal frame. Work carefully to avoid damaging the gasket, as it can be reused.
5. Clean residual glue and other materials off the speaker frame with the craft knife, solvent, and sandpaper.
6. Cut strips from an index card, and tape them in place as spacers around the gap that the voice coil goes into. These spacers will need to be removed later, so ensure that they will be accessible once the new cone is in place.
7. Verify that the new cone and coil fit the speaker by dry-fitting them in place.
8. Glue the new spider and edge foam to the speaker cone if not already attached. Many cones come with these pre-installed to the cone.
9. Apply glue to the frame to glue the edge foam and spider to it. Attach the cone, clamping it in place until the glue can dry.
10. Reattach the gasket by gluing it in place.
11. Remove the strips of index card that were used for spacers.
12. Solder the coil wires to the terminals. These must be soldered; simply twisting the wire around the terminal will not suffice.
