Sound Projector Click Here to know the glossary : MSP-5200 Metallic Sound Projector 5” Full rangeRated 20W91 dBSPL (1W/1M)Aluminium SOP-5200 Sound Projector 5” Full rangeRated 20W93 dBSPL (1W/1M)ABS SOP-5200D Bi-Directional Sound Projector 5” Full range x 2Rated 20W86 dBSPL (1W/1M)ABS XMR-520PL Sound Projector 5” Full rangeRated 20W98 dBSPL (1W/1M)ABS MBP-5120 Metallic Bi-Directional Projector 5” Full range x 2Rated 12W91 dBSPL (1W/1M)Aluminium