From what I have read these are basically the same sub aside from the flyware. Any potential issues that could arise from combining them into one system for a rock band gig?
Re: Combining QSC KW181 and KLA181 into same ground stack
From the specs, they appear almost identical, but the KLA181 is 12lbs lighter at 88lbs, and is also highly different in internal design and the cabinet. Same innards, different cabinet. If you distribute them correctly, however, you shouldn't have any particular issues. Maybe consider processing the two types separately, though, just in case it makes a difference for you some way you didn't expect.