Blew away my expectations!
When I heard that we were getting a Mackie HD line array system instead of the QSC KLA at our church (our budget couldn't quite accommodate the QSCs), I rolled my eyes and hoped for the worst. I was pleasantly surprised when I mixed my first service on our new system (we completely ripped out our old analog system and put in, among other things, 1 HD1801 and 2 HDAs per side). After some SMAART tuning these boxes sound great! Lots of punchy bass for an 18" sub.