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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
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Sennheiser HD 580 - 600 - 650 replacement drivers not what they seem | Headphone Reviews and Discussion - Head-Fi.org
What are the best headphones you would recommend in the $100-$250 range? What headphones do you have? | Page 4 | Audio Science Review (ASR) Forum
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