A transcutaneous bone-anchored hearing aid device for a recipient patient, configured to be implanted and comprising: • a receiver coil for transcutaneous receiving of an externally generated communication signal, • a signal processor configured for converting the externally generated communication signal into an electrical stimulation signal, • an electromagnetic vibrator configured for receiving the electrical stimulation signal, and wherein the electromagnetic vibrator includes: o a coil unit configured to generate a dynamic magnetic flux based on the electrical stimulation signal, o a permanent magnet configured to generate a static magnetic flux, o a mass unit connected to the permanent magnet, o a bobbin unit configured to engage with the coil unit, the permanent magnet, and the mass unit, o a spring unit configured for maintaining an air gap below a moving mass, wherein the moving mass includes the coil unit, the permanent magnet, the mass unit and the bobbin unit, and where the moving mass and the spring unit is configured to generate an acoustical vibration, o a vibrator plate configured to receive the acoustical vibration, and where the air gap is between the vibrator plate and a part of the moving mass, and wherein the mass unit has at least one insert on a bottom surface, wherein the insert is configured to receive at least the spring unit and optionally the vibrator plate, the transcutaneous bone-anchored hearing aid device being characterized in that the spring unit is arranged completely within the insert. • a receiver coil for transcutaneous receiving of an externally generated communication signal, • a signal processor configured for converting the externally generated communication signal into an electrical stimulation signal, • an electromagnetic vibrator configured for receiving the electrical stimulation signal, and wherein the electromagnetic vibrator includes: o a coil unit configured to generate a dynamic magnetic flux based on the electrical stimulation signal, o a permanent magnet configured to generate a static magnetic flux, o a mass unit connected to the permanent magnet, o a bobbin unit configured to engage with the coil unit, the permanent magnet, and the mass unit, o a spring unit configured for maintaining an air gap below a moving mass, wherein the moving mass includes the coil unit, the permanent magnet, the mass unit and the bobbin unit, and where the moving mass and the spring unit is configured to generate an acoustical vibration, o a vibrator plate configured to receive the acoustical vibration, and where the air gap is between the vibrator plate and a part of the moving mass, and wherein the mass unit has at least one insert on a bottom surface, wherein the insert is configured to receive at least the spring unit and optionally the vibrator plate, o a coil unit configured to generate a dynamic magnetic flux based on the electrical stimulation signal, o a permanent magnet configured to generate a static magnetic flux, o a mass unit connected to the permanent magnet, o a bobbin unit configured to engage with the coil unit, the permanent magnet, and the mass unit, o a spring unit configured for maintaining an air gap below a moving mass, wherein the moving mass includes the coil unit, the permanent magnet, the mass unit and the bobbin unit, and where the moving mass and the spring unit is configured to generate an acoustical vibration, o a vibrator plate configured to receive the acoustical vibration, and where the air gap is between the vibrator plate and a part of the moving mass, and wherein the mass unit has at least one insert on a bottom surface, wherein the insert is configured to receive at least the spring unit and optionally the vibrator plate,