User blog comment:FairyRaven/Fairy Tail Chapter 375: The Supernatural, Review and Commentary/@comment-1153699-20140315153345/@comment-7418318-20140315185856

I still wouldn't count Cube's control-room as technological.

For all we know Cube itself might be alive, or the Demons might have other beings enslaved and use them as powersources for their equipment (kinda like Magnostadt used the fifth district citizens, or like the machines used Humans in the matrix franchise).

Also Lacrima can hold a certain amound of magic, so they might just have to pump some of their magic power (or however you call their equivalent that fuels their curses) into the machines from time to time.

But FT does have a lot of magical equivalent to our technology, including MP3 players of sorts (Laxus' Soundpod) and even the internet (Archive Magic). And they have enough technology to have non-magical cannons and steam-trains, even though they don't seem to have combustion engines yet.