Abstract: A transducer (1) includes a transducer axis (2), a membrane (3), a magnet system (6) having an outer magnet system part (7) and an inner magnet system part (8), a moving coil configuration (27) connected to the membrane (3) and having a coil carrier (28) and a moving coil (29) held by the coil carrier (28) in an air gap (14) between the two magnet system parts (7, 8), and guides (36) for rectilinearly guiding the moving coil configuration (27) parallel to the transducer axis (2). The moving coil configuration (27) has a cylindrical boundary surface (42) which, together with a cylindrical boundary surface (15) of the outer magnet system part (7), delimits a cylindrical gap (43) which is acoustically impermeable above a lower limit frequency of at most 100 Hz.