So I found an old DR-S4 headphone with the leather headband and pads surprisingly supple after years of sitting in an attic, and thought that it would be a good opportunity to rehouse my PortaPro drivers.
As you can see, the drivers are pretty small in the enclosure, but I am keen to try the PortaPros in a closed cup for the added isolation.
Does anyone have any tips in terms of padding/acoustics etc in the cup? There is plenty of space in the cup with the small PortaPro drivers, so I was thinking about some foam for damping etc, but this is my first DIY mod so suggestions would be appreciated!
