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Recone Procedure
1)
Remove grille and inspect speaker carefully before disassembly. Look for and record
the following:
A) Model Number, Serial Number, Date Code, Customer, and Complaint
B) Obvious damage or defects
C) Rubbing / Buzzing
D) Damaged dust dome
E) Damaged cone
F) Glue bond, compliance to frame
2)
Remove dust dome. Look for and record the following:
A) Voice coil rubbing in the gap
B) Evidence of cone collapse near the voice coil joint
C) Chips in the gap
3)
Remove the cone assembly. Look for and record the following:
A) Coil condition: Overheated, rubbing, chip gouges, voice coil date code
B) Coil to cone and spider bond.
C) Bent or broken frame
D) Loose magnet assembly
E) Foreign material in the gap
F) Check gap concentricity with appropriate gap gauge. Be sure to check
both upper and lower gaps
4)
Remove and discard the grille standoffs.
5)
Cover magnet gap with tape. Scrape and sand compliance land and spider land until
clean and flat.
6)
Clean all dust and dirt from speaker. Clean compliance land and spider land with MEK
or acetone.
7)
Remove tape from gap and clean magnet gap with masking tape and with MEK and
a rag.
8)
Unpack recone kit and inspect for damage.
9)
Verify that the voice coil impedance is correct for the model under repair. 8 ohm voice
coils have a blue mark near the leads, and are used in the passive models ONLY.
10) Place Mylar tube inside the voice coil.
11) Test-fit the cone assembly to the speaker frame. Make sure the tinsel leads are
aligned with the proper terminals, and the scallops in the compliance are aligned with the
bosses on the compliance land. It may be helpful to mark the uppermost scallop. Remove
the cone assembly.
12) Apply a 3/16" (4.75mm) bead of glue to the frame at the spider land. Apply another
bead of glue to the inner edge of the compliance land.
13) Install the cone assembly, maintaining proper alignment of the leads and scallops.
14) Press the surround into the glue with Teflon or orange stick.
15) Allow at least 30 minutes for adhesive to set.
16)
Press the surround into the glue again.
17) For best results, allow 24 hours to dry.
18) Remove Mylar tube from voice coil.
19) Using pliers, connect 2 tinsel leads to the terminals.
13
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