Haven't heard anything back regarding replacement driver yet, so I'm wondering if I should try 3rd party drivers
Found these: http://www.aliexpress.com/item/50mm-speaker-unit-Strong-Bass-Titanium-film-fever-unit/32337138321.html (yes, they are only 50mm but I haven't found any 53mm)
There are plenty of options on AE, but I'm not sure about the quality of them. Any advice about what to look for?
So did you ever get drivers for your hp150?