I bought a pair of Samson Expeditions (the 50W ones I think) and when I jammed with my band I didn't even have to crank them up, they were quite loud in our basements. I started with them up at about chest level, on a pair of Samson stands and eventually put them on the floor as wedges just a bit behind my drums. As Chaser says, big difference if you have a pair, not just one. Also that way you get the panning/stereo effect which is more realistic than a mono output.