A first driver housing and a second driver housing are positioned inside an earbud cup. The first driver housing has a rear side, a front side, a top face a bottom face, and a sound output tube extending from the front side. The second driver housing has a top side, a bottom side, a front face, a rear face, and a sound output opening formed in the front face of the second housing with essentially no tube extending therefrom. The rear face of the second housing is disposed a) adjacent to the front side of the first housing, and b) behind an exit of the sound output tube of the first housing. Other embodiments are also described and claimed.