The robust and compact UK-built OBC115C features a Celestion Pulse XL 15-inch speaker housed in a rock-solid 13-ply high-density 18 mm birch plywood cabinet, with a pair of hard-wearing skids on the underside for enhanced stage protection. The skids also couple the enclosure to the floor to improve bass response. Internally, the enclosure is acoustically compartmented for increased strength and reduced vibration, with a side port allowing for speaker self-correction.