If the air gap has ferrofluid in it, the fluid will help to keep the voice coil centered. If you need to replace the ferrofluid, please, for all that is holy in this world, use audio grade fluid. A reputable speaker repair service will know and understand how to use ff in a driver. Ask what type of fluid they use. If they say EFH1 or something they got off Amazon, DO NOT POWER UP THE DRIVER AND DEMAND YOUR MONEY BACK. This is not audio grade fluid and will ruin your drivers. I have no experience with Dunlavey speakers, but I would suggest Ferrotec APG L11 as a good substitute for what was in there. Good luck with your repairs!
- Vanessa
- Vanessa