*Headphones: Sennheiser HD750, Sennheiser HD900, Sennheiser HD565, Sennheiser HR70, AKG K841, AKG K191, Beyerdynamic DT855, Beyerdynamic DT909, Beyerdynamic DT100-250, Grado HS-2, Grado SR-2, Grado SR-265i, Ultrasone D-FI Proline 720, AudioTechnica AD4000, AudioTechnica A500 LTD, AudioTechnica W101
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