My need was for a very powerful full range speaker, as personal monitor for onstage electronic drum sounds. I wanted something that had more power than I needed, not less, and preferably all in one box. The Turbosound iQ 15" meets my needs, as it's stunning. It's easy to use, and produces crystal clarity, at huge volume levels, in both higher and lower frequencies, well beyond my hearing range. I'm planning on buying a matching iQ series 18" bass speaker, to attempt to assume the onstage presence of an acoustic drum kit with a fully electronic drum kit. I have every confidence that the iQ speakers will do this job really well.