An implantable bone conduction transducer arrangement comprising: a transducer housing (200, 300, 400) having an outer surface with a side wall and opposing ends (201, 205; 301, 305), said opposing ends comprising an inner end (201, 301) configured to fit against underlying skull bone, and an outer end (205, 305) further away from underlying skull bone when said transducer housing is implanted; a pair of fixation projections (202, 302) connected to the transducer housing (200, 300), each fixation projection including a bone screw opening (203, 303) configured for insertion of a bone fixation screw to engage underlying skull bone; wherein at least one fixation projection (202, 302) is configured to be independently moveable relative to the transducer housing (200, 300) to form an adjustable relative position between the fixation projections (202, 302), wherein the outer surface of the transducer housing has an edge receptacle notch on its side wall, and said at least one fixation projection configured to be independently movable relative to the transducer housing is slideably engaged by said edge receptacle notch, or wherein said transducer housing (200, 300) has a generally cylindrical shape with a center cylindrical axis and wherein said transducer arrangement further comprises a pair of projection rings (204, 304), each projection ring (204, 304) including one of the fixation projections (202, 302), wherein the projection rings (204, 304) are connected to the transducer housing (200, 300) at the side wall and at least one projection ring (204, 304) is configured to be rotatable relative to the transducer housing (200, 300) about the cylindrical axis of the transducer housing (200, 300) so that an adjustable relative arc exists between the fixation projections (202, 302). a transducer housing (200, 300, 400) having an outer surface with a side wall and opposing ends (201, 205; 301, 305), said opposing ends comprising an inner end (201, 301) configured to fit against underlying skull bone, and an outer end (205, 305) further away from underlying skull bone when said transducer housing is implanted; a pair of fixation projections (202, 302) connected to the transducer housing (200, 300), each fixation projection including a bone screw opening (203, 303) configured for insertion of a bone fixation screw to engage underlying skull bone; wherein at least one fixation projection (202, 302) is configured to be independently moveable relative to the transducer housing (200, 300) to form an adjustable relative position between the fixation projections (202, 302), wherein the outer surface of the transducer housing has an edge receptacle notch on its side wall, and said at least one fixation projection configured to be independently movable relative to the transducer housing is slideably engaged by said edge receptacle notch, or wherein said transducer housing (200, 300) has a generally cylindrical shape with a center cylindrical axis and wherein said transducer arrangement further comprises a pair of projection rings (204, 304), each projection ring (204, 304) including one of the fixation projections (202, 302), wherein the projection rings (204, 304) are connected to the transducer housing (200, 300) at the side wall and at least one projection ring (204, 304) is configured to be rotatable relative to the transducer housing (200, 300) about the cylindrical axis of the transducer housing (200, 300) so that an adjustable relative arc exists between the fixation projections (202, 302).