Abstract: An electrodynamic loudspeaker device comprising a chassis (1), a translatable body (3) and an actuator (11) arranged for moving the translatable body (3) with regard to the chassis (1). The translatable body (3) is provided with (1) a three-dimensional diaphragm body (5) having a contour (5c), a diaphragm base part (5b) and a diaphragm top part (5t) which is wider than said base part (5b), an axial axis (5a) extending from the one part to the other part and (2) a support body (7). The support body (7) has a bound support end portion (7b) fixed to the diaphragm base part (5b) and a free support end portion (7f) and extends substantially parallel to the axial axis (5a) and at least partly inside a space (9) enveloped by the contour (5c) of the diaphragm body (5). The actuator (11) comprises a stationary actuator part (11s) supported by the chassis (1) and a movable actuator part (11m) supported by the support body (7) and sited between both support end portions.