Due to going world conflicts, my preferred speaker manufacturer is no longer producing their top tier sub bass or line array cabinets because they can no longer get hold of Baltic Birch plywood due to sanctions imposed on the country of origin.
I've had to get creative, and approached a local joinery firm to reverse engineer my existing sub bass cabinets, re-design them in CAD software to fit hardware such as handles, wheels, etc. and export the files to operate their saws and CNC routing equipment. I've also had to acquire some alternative 18mm ply that's similar in strength, character and capability of Baltic Birch.
I spent a lot of time researching which drivers would be best suited for use in the newly built cabinets, and it was either a choice between Fane and RCF. I eventually settled on four of these RCF drivers simply because Fane were out of stock. I have no regrets, as the RCF drivers sound very good. They're missing some of the 30-40hz that the existing boxes seem to be capable of so I've had to re-introduce that with a little EQ.
In the coming months it seems likely I'll be building two more twin 18" cabinets, and when these drivers are back in stock with Thomann I'll probably purchase another four.
My only issue with these drivers is that some of the glue that attaches the driver to the basket managed to get wet at a very rainy outdoor festival in July. There was a very visible white ring around the edge where the glue had became damp. After a day of drying out, the glue ring slowly disappeared again, so my advice is to use a very fine speaker grille to catch water droplets if you intend to use these drivers for any outdoor use.