Alto TS210 weigh 22.0 lbs and are MAP at $249. Lightest 10 inch speakers on the market.
If you ask me, at 3x to 4x the price, FBT should be able to produce a light weight speaker at least as light weight as Alto...especially now that we are approaching 2018.
I carried my Alto TS212 28.5 lb speakers (3 of them) up and down 2 flights of stairs last night along with everything else.
...My body is still strained from that by the way, BUT I love that I can carry 2 12s up and down stairs when I want to load in/out quickly.