Compression drive units - some advice needed

[Thetiminator]

Hi guys
My speakers use Viavox S5’s which are turning 30 this year. Just wondering what’s the story with maintenance/servicing? I’ve read that the magnets need re-magnetised etc. Does the charge just naturally dissipate over time and does this affect the units SQ? Are there any other parts that need serviced? Has anyone any experience with having compression drivers serviced?
Cheers guys

 

[gian60]

I have speaker Montagna made in Italy
You can see www.hiend.it

Mr Montagna do service also for every driver since 40 years,and repair and has all the machine to re-magnetized and repair
You can mail to him and send to him for every service you need