The Bronze 5's have two mid/ bass drivers which are isolated with their own acoustic chambers. Each driver has its own port (one at the front and one at the back). Not only does this help with positioning but it greatly reduces distortion and provides a greater bass extension.
The dual 5.5" bass/ mid drivers are housed in a moderately slim cabinet. Despite their size, they love to be pushed hard and maintain the clarity and rhythmical precision you find throughout the Monitor Audio ranges.