HD650 driver from 2005. Is this really bad? : r/headphones
Przetworniki do HD 650 | 092855 - sennheiser.pl | Oficjalny sklep Sennheiser
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 092855 speaker – FixPart
Headphone Drivers
Sennheiser HD600 HD650 HD660S Analysis | Page 5 | Super Best Audio Friends