Interesting thread!
I have a Focal SW800v W which was the limited model with the W sandwich cones from the 1000 series.
I bought it new along with a CC800Vw centre channel and 826vw main speakers.
At just over 3 years old, the BASH plate amplifier died. By that time Naim were the Focal service agents for the UK which is where Focal France pointed me.
Basically the unit was totally unserviceable. Not bad for a 3 yo £800 sub.
I did end up having various conversations with the Naim service dept and although they were able to give me diagrams, the SMPS was a typical cheap rubbish affair and had a mini bespoke voodoo magic module on it that was never seen before or again. After much research, I took and punt on a BASH 300 plate amplifier as it looked the same. I could only get them from the US and one seller refused to seel to me as it was configured for US 115v and not UK 240v. I tried to explain it was an SMPS and the fact that there were only a couple of small components that needed moving to make it work correctly at 240v but they wouldn't budge.
I did find a supplier in the end. I made the very minor mods to the mains input circuit to accept 240v and tested who whole replacement unit. It was fine. I then swapped the PSU with the one in the original Focal plate so I retained any proprietary filtering specific the driver and enclosure.
I find it incredible that both the manufacturer and the reputable UK service agent thought it was acceptable for me to throw an £800 sub in the bin after just over 3 years and were not able to offer repair.
Interestingly on the flip side of that, I have a large paradigm sub that's probably nearly 25 years old now. Its a traditional power supply that has new mains caps and the driver foam was replaced when it fell apart. Its a monster and I really see no reason it wont be capable of shaking the floor in another 25 years..... I suspect the Focal will be dead again within a few year as the replacement SMPS has already outlasted the original unit!! I hate SMPS lol