So you can fly or ground stack the L’Acoustics Kara or SB18 subs you will need the correct rigging option. When hiring from AudioCP simply state the requirements and we can advice on the nest options. The M-Bump allows for up to 24 Kara to be hung or 4 x SB18 with 12 Kara below, the MiniBU-EX allows for 6 Kara to be hung or ground stacked. There are a variety of hanging and stacking options so it is best to speak to one of the team.