Sennheiser HD600 Review (Headphone) | Audio Science Review (ASR) Forum
Sennheiser Replacement Capsules HD650 Each
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
Sennheiser HD 580 - 600 - 650 replacement drivers not what they seem | Headphone Reviews and Discussion - Head-Fi.org
Sennheiser HD600 Review (Headphone) | Audio Science Review (ASR) Forum