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 , <EOS>