ThurstonX
Headphoneus Supremus
jergpads are originals, developed by jerg and modulor. FocusPads are the official HFM (HiFiMAN) pads shipped with the HE-400i and HE-560. HFM used some of the principles of the jergpads in the design of the FocusPads and FocusPad-As. The two FocusPad variants use softer foam than the jergpads, which utilize parts from the two older HFM pads (velour and pleather).