SPM20 aluminium body 20W power sound projectors with U-bracket used to be mounted in public and industrial areas without negative influence to interior and exterior environments. Quality sound restoring, U-bracket, 100V transformers power taps, 140° sound dispersion and 130Hz – 15kHz frequency response make these sound projectors suitable for music reproduction as well as for voice announcements. SPM20 has built-in 5" (127 mm) full range speaker.