Today I've received a speaker back from Devialet. First of all, like with many or all other cases, it's a newer model, not a repaired one. The serial number starts with U, meaning that it's one of the freshest Phantoms (also now it has a fresnel lens like power button on the back with integrated light). From the look of it, it seems that speaker probably was refurbished at some point, there is some patina / marks on the gold sides, but that's the least concerning thing.
Summing it up:
1. Phantom 1 Gold, 6-7 years old was dented
2. Devialet asked for a photos, confirmed the repair, and then took a 350€ payment
3. Devialet sent a transport box to me together with UPS label to send it back
4. Speaker was sent back, and in about 5 days later, I've received a replacement speaker, which is of a newer generation
5. Now it comes with 12 months warranty
6. It seems I can keep transport box for myself too
I'd say this is an absolute bargain and Devialet did an amazing job there.
Summing it up:
1. Phantom 1 Gold, 6-7 years old was dented
2. Devialet asked for a photos, confirmed the repair, and then took a 350€ payment
3. Devialet sent a transport box to me together with UPS label to send it back
4. Speaker was sent back, and in about 5 days later, I've received a replacement speaker, which is of a newer generation
5. Now it comes with 12 months warranty
6. It seems I can keep transport box for myself too
I'd say this is an absolute bargain and Devialet did an amazing job there.

