Grado HP1's bass rattle

Edroom

AK Subscriber
Subscriber
I have a pair of HP 1000's model one.
They need servicing, I called Grado and they said the only thing they could do was replace the driver with a new version.
I am not sure but this seems to me like putting a realistic replacement driver in a vintage Altec cabinet.
Does anyone have advice for refurbishment or restoration of original driver?
Thanks!
Ed
 
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