The low end utilizes a high efficiency 15″ low frequency speaker with 3″ voice coil. The high end makes use of a 1″ exit compression driver with 2″ titanium diaphragm, coupled to a constant directivity horn. Full use of high pressure injection moulding techniques has achieved a mineral loaded polypropylene cabinet of a very high density. Internal design provides extensive wall reinforcing for minimum vibration. A moulded-in handle facilitates carrying. For added resistance, rugged steel grilles protect the components.