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Sennheiser HD 560S seem to have made an unannounced revision for 2023 : r/headphones
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Replacement Cable for -Sennheiser HD25 HD560 HD540 HD480 HD430 414 HD250 HD425 HD430 HD440 II HD530 HD540 Headphone Audio
Metal Headphone Cable For Sennheiser HD25 HD560 HD540 HD430 HD250 Headphones Adapter Replacement Spring Coil Earphones - AliExpress
Used Sennheiser HD 560 Ovation Headphones for Sale | HifiShark.com