As a follow up on the AR12's I highly recommend you remove and replace the ferro-fluid on the mid range every 10-15 years as its true performance depends on it. The mid range cone has NO spider mechanism whatsoever and floats in the ferro-fluid providing true linear movement. I can get dried and "gunked up" over time but it is relatively easy to r&r.
Hi Taineasy,
I have a 12 mid that requires the ferrofluid be replaced (it’s gummed up by old fluid), but can’t find any method to do this outside of reconing the driver. It sounds like you have experience in doing this. Can you let me know the steps and process you used to do this? Thanks in advance...
I'd also love to know the process for this... I have a set of AR12s and one mid seems slightly sticky.
I also have a set of AR12s and one mid also seems slightly sticky. I'm in the process of refoaming both midranges. One mid seems (visual inspection as far as possible) to have a bit less ferro-fluid than the other mid. I'd also love to know the process for remove and replace the ferro-fluid on the mid range. See picture: Do the screws need to be loosened? Can someone give me more instructions or advice?
I believe the mids have 1-inch voice coils. For example, is this product okay?: https://www.parts-express.com/Ferrofluid-100uL-General-Purpose-for-1-Diameter-V.C.-340-540
Without loosening screws/opening the midrange: Does it make sense to add drop per drop ferro-fluid to one mid (with a syringe?) until both mids move just as easy?
Last edited: