FI has been saying up to 45 days due to covid before they get built last time I checked on anything at their website. Best to ask them via email or facebook as they usually get right back to you.
"Due to COVID-19 all orders can have upto 45 business days lead time"
Too Bad they don't make the 12" in a Dual 4ohm otherwise I would seriously think about them over the SSA Icons I have been looking at as the RMS is perfect on the XV3 Series.
Either way you can not go wrong with either the SSA Subwoofer, FI or DD or even DC.
Talk to
@Buck about a box and the results he has gotten out of each of those subwoofers as he has done a few hundred box designs over the years.
ficaraudio.com