The SD-2 amp loudspeaker is a powered version of the SD-2 loudspeaker system that combines exceptionally accurate reproduction with high SPL output in a very compact enclosure. The SD-2 amp uses a proprietary 12 inch cone low frequency driver mounted in a vented enclosure with carrying handles, four aircraft pan fittings (two on top, tow on bottom) and one 35mm tube stand adaptor. The high frequency unit is a 3 inch diaphragm high frequency compression driver couple to an in house designed 90°x 40°horn. The SD-2 amp built-in electronics package features a new bi-amplifier module, designed specifically for AP self-powered products.