Membrane effects of capsaicin on rat dorsal root ganglion neurones in cell culture

A speaker system comprises an enclosure and at least one speaker mounted therein. The enclosure includes at least one duct connecting the interior of the enclosure directly with the outer air at the front thereof. Each duct is confined at least at one side by a member extending substantially normal to and running substantially the width of the front of the enclosure. The member has its front and/or rear edge rounded so that the cross-sectional dimension of the opening of the duct at the respective edge is greater than that of the central section of the duct.