In the rich world of PA systems, more and more compact column array systems are popping up. The way that a column array system is built is pretty much a copy of the structure of a line array system - the kind of sound system you see at a venue or festival. These can be huge, long stacks of speakers mounted on top of one another in a curved shaped on either side of the stage, aiming down into the audience. Line arrays are specifically designed to deliver an optimal spread of both the high and mid-range frequencies so that, whether you're standing to the left, the right, in the middle, or all the way in the back, you get a balanced audio-image of what's happening on the stage. Meanwhile, separate subwoofers take care of the low-end and can just be placed on the ground since bass frequencies are much less dependent on the direction in which they're pointed. The popular and more compact column array systems designed for smaller spaces are basically a smaller version of this, with the biggest difference being that the high and mid-range speakers are mounted inside one elongated housing. This 'column' is then mounted on top of a more manageable subwoofer. These systems are naturally quite a bit smaller than a line array system and are designed to be easy to build, break down, and carry. With these thoughtful systems, speaker stands aren't even needed, and they're ideal for amplifying presentations and small gigs, or can provide a great sound system for DJs that prefer to bring their own gear.
