Four adapters that allow you to use regular round earpads with Koss Pro4S.

100mm, 105mm, 110mm, and 105x90mm ergonomic (follows the shape of the case with 16mm offset)

I personally use 100mm with aftermarket DT770/990 leather earpads.

All models are RIGHT side. For the left side just mirror the model.

Printing is fairly easy, supports are needed under the lip that clips to the headphone latches.

Print Settings

Supports:

Yes

Resolution: 

0.2

Infill:

15%, Gyroid

Filament:

Bestfilament PETG

Black