STAX - STAX SR-5 Headphone + SRD-6/SB Adapter -Headphones Condition: Technical 100% Optically: Hardly any signs of wear. I have carefully tested this combination extremely comprehensive and carefully together with various amplifiers (Marantz - Luxman - Kenwood - Sansui) Everything still works excellently. The condition is really fantastic Included are the original manuals, which incidentally also contains other STAX combinations. Advice on connecting the devices: The Adapter connects only to the speaker terminals of the Amplifier. (An example I will send with the set) Technical specs: See the images or look on the internet. Please note: The Adapter concerns STAX type SRD-6/SB and not SRD-6