Here's the quick and easy way to recone speakers.
First you'll need:
- A Stanley knife (to remove the old cone/coil)
- A scribe (very handy, you'll find ways to use it)
- A small flat screw drive
- Soldering iron & solder
Then onto the reconing goodies:
What you see is a complete recone kit. This consists of:
1x Coil, former & spider assembly
1x Cone & surround assembly
1x Dust cap
1x Lock Ring (this is particular to this kit and secures the spiders to the basket)
We're using Loctite Prism 480 adhesive. Its specially designed for high pressure, high temperature bonding of rubbers, alloys & canvas, and dried without residue. Perfect for our application ! Fully cured, it will withstand 22PSI of strain.
Quick adhesive notes:
Dont use an epoxy, they can't be easily removed at a later date if you need to recone again.
Superglues will leave a white residue thanks to the curing accelerators in them, and they can attack foam surrounds.
Silicon based adhesives dont have a high enough bond strength
Finally there are the gap spacers (the white plastic C's), these center the coil in the motor while the adhesive sets. Without them, it's almost impossible to get a good clearance and you'd end up with binding.
Mine were supplied with the reconing kits, but you might not get them with yours. As an alternative, you can experiment with heavy thickness paper instead to get the gap right. The pole piece should be a snug fit inside the former with the sleeves in place.
Here's a close up of the coil:
Duel voice coil, flat copper wire, 2.5" alloy former with Kevlar wrap. 1ohm a piece.
Duel spiders, formed and sealed in the factory with tinsel leads between the spider layers.
This setup should be good for 3000W burps.
