SonusFaber Signum mis-aligned voicecoil

[triodes4ever]

Is there any forum member having any experience with the following, I recently bought a set of SonusFaber Signums. Unfortunately one of the mid-woofs' voicecoils is mis aligned i.e. not centered well. I don't know what could have caused that, it might be from the beginning and the previous owner missed it, I would not see tht happening over time. Issue is how to fix it. The gap at 12 o'clock is as good as closed, the gap at 6 o'clock is double the width practically. Hence the woofer scrapes, which (to me at least) is quite audible.
I could imagine to loosen the magnet, center it and fix it in place but I have no idea if such would be possible at all. Woofer replacement with a brand like SF seems an expensive adventure. I did write the Dutch importer and am awaiting a response, but I can only fear that won't become a free lunch...

Anyone? Cheers Leonard

[pinkmouse]

Sounds like it's been dropped and the motor has shifted. If the magnet is glued or riveted on, (very likely with a domestic driver) then it's likely non-repairable. If it's a pro driver with bolt on motor, it might be fixable, but you'll need to strip out the old cone to do the job properly, then do a recone afterwards, if you can get a recone kit that is. Sorry.

[weltersys]

It is possible that the panel is warped or the screws are uneven torque, distorting the frame.

Some driver's cones shift over time, rotating the cone can help.

Try removing the driver, and checking it outside of the box.

[pinkmouse]

It's certainly possible, but personally I've never had uneven torque causing problems in anything smaller than a 12". Give it a go anyway, you have nothing to loose!

[Hennie]

I had a similar experience with another Sonus Faber speaker. During inspection of the driver it was apparent that the die cast basket was cracked. Cracked baskets are not uncommon. It can happen if the speaker is dropped during transport - those die cast baskets don't have much impact resistance.

I received a matched pair of replacements from the local agents - they kindly paid for one of the drivers although the speaker was dropped by my transport contractor. Despite the fact that the driver was custom made for Sonus Faber, the price of the replacement part was entirely reasonable.

[Mikewong]

Is one of the mid-bass off-centered?