Suitable for commercial applications, this 4" dual cone in-ceiling speaker produces excellent intelligibility for speech and full-frequency response for music. It provides wide dispersion that can actually reduce the number of speakers required for even coverage in distributed speaker systems. The dual cone speaker has a full range driver with high-frequency whizzer cone to provide the kind of crisp high-frequency response typically associated with coaxial speakers. The ported enclosure is tuned for extended low-frequency response.