The royal pain in the rear. Dented HD650 diaphragm centrally and peripherally. What can I do? Moderate "dulling" and weakening of the left channel. More details in the comments. : r/headphones
System 300R HD650 | Sennheiser Consumer
The Sennheiser HD580 Impressions Thread | Page 112 | Headphone Reviews and Discussion - Head-Fi.org
Used sennheiser-hd-650 for Sale | HifiShark.com
Used sennheiser-hd-650 for Sale | HifiShark.com
Used sennheiser-hd-650 for Sale | HifiShark.com
Capsule for Sennheiser HD 650 | MSTORE
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The Sennheiser HD580 Impressions Thread | Page 112 | Headphone Reviews and Discussion - Head-Fi.org