Apparatus includes a housing, the housing including a first body part and a second body part, the first body part being moveable relative to the second body part, wherein the housing has a first configuration when the first body part is in a first position relative to the second body part between and a second configuration when the first body part is in a second position relative to the second body part; and a speaker arrangement, wherein the speaker arrangement comprises a transducer, a front cavity coupled to a first side of the transducer, and an opening. The opening connects the front cavity to an exterior of the housing. A rear cavity is coupled to a second side of the transducer, the second side of the transducer being on an opposite side of the transducer to the first side of the transducer. The speaker arrangement has a first physical arrangement when the housing is in the first configuration and a second physical arrangement when the housing is in the second configuration, the first physical arrangement being different to the second physical arrangement.