Ohm F speaker repairs fall into the Specialty Catagory. These repairs require quite alot more time (and patience) than a standard refoam or recoil.
How We Repair: We are able to replace the 12″ foam surround on the outside edge of the cone, and we now replace the foam on the inside narrow end of the cone throat with felt. If you want to DIY refoam these speakers, the kit we use is the RFK128 JBL (alternate options are RFK12 JBL2214 or RFK12 Angle), but be prepared to dedicate some time to accomplish this repair.
We can also replace the voice coil. In order to replace the voice coil, we must also replace the spider and surround (how to identify speaker parts), but we must reuse the original cone body. This repair can only be successful if the cone body is not dented or damaged and can take a few hours to a few days. The installation of the new spider can require that we center the voice coil without shims which can require multiple attempts as corrections are made. The original Ohm F voice coils were 4 ohms and flat wound and we can now repair with the same voice coil. Again, I stress, to complete either repair, the remaining original cone must be in good condition and cannot be dented or damaged.
Click here for Pricing and more Info. Our turnaround time for most standard repairs is 2-5 days, but the turnaround for these speakers can be 1-3 weeks. For more info and pricing.
Sending the speakers: When packaging these speakers, it is best to keep them mounted on the wooden base. Do not wrap anything around the cone or struts. They are both easily damaged. We suggest packaging the speakers in a tight fitting carton, cushioning the box with bubble wrap or foam (no shipping peanuts) and then double boxing. Insure well!
I would be some of question of Ohm F speaker repairs.
You have 3.0″ voice coil (https://reconingspeakers.com/product/ohm-f-voice-coil-flat-wound-8/) for Ohm F what its impedance is 8 Ohm instead of 4 Ohm as the original coil. Can you tell me how is changing the sensitivity of the Ohm speakers from the new 8 Ohms voice coil?
And as I know you did not put any material to the magnet gap like grease or ferrofluid for the cooling just clean the gap out and do not put anything in the gap am I right?
And if you have any technical instruction for repairing the Ohm F could you let me share in private?
There are different versions of the Ohm F. They have different voice coils. In general, the original Ohm F voice coil’s have a DCR in the 4-5 ohm range. The voice coil we offer has a DCR of about 6 ohms.
We do not use anything to clean the magnet gap other than masking tape.
You can use these instructions for cleaning the gap https://reconingspeakers.com/faq/how-to-guides/how-to-clean-the-voice-coil-gap/ it is the same for a low frequency or high frequency driver.
This is where you can find info on our site about the Ohm F repairs. https://reconingspeakers.com/how-we-repair-ohm-fs/
If you have more questions, you can email us at service@speakerex.com