One aspect of the invention is an amplifier, comprising an input stage amplifier coupled to an output node. According to the invention, provision has been made that the cooling element basically consists of metal and the cooling element encloses the electronics unit in such a way that it results in an electromagnetic shield of the electronics unit. In some embodiments the audio data includes audio data from a plurality of streams of audio data. A first lock is provided between the support members which is able to be interengaged when the support members are in the first position to maintain the wheels in the first position and to enable the support members to cooperate with each other in accommodating the stresses and load exerted thereon when in the first position. Further described is the use of the aforementioned antibodies, antigens, polynucleotides and vectors in adoptive immunotherapy, preferably for the treatment or prevention of HCV infection during liver transplantation.