Hi everybody, my current setup is Notebook  -> DAC HRT Music Streamer II -> Meier Audio Corda Ha1 Mk II -> Sennheiser HD650. I would like to upgrade the Corda but I am not sure of what would really be an upgrade. Would it make sense to upgrade it with a Graham Slee Solo or would it be the...

Hello, my sweet Corda Ha1 Mk2 fell to the floor and stopped working. I am trying to open it to check if there's anything broken inside but I have no idea how to remove the volume knob. Pictures of the amp are here, cordaha1 As you can see, to open the amp I need to remove the knob... but how...