Beyerdynamic DT 1990 Pro MKII

Beyerdynamic’s product page explicitly lists the Mixing & Mastering set as fitting DT 1990 PRO MK II and gives article number 1001978.

Beyerdynamic’s replacement guide lists the MKII Mixing & Mastering pads and explains the groove-and-rotate fitting method.

Beyerdynamic describes Mixing & Mastering Velours as the more analytical option and distinguishes them by exactly four small rear holes.

Beyerdynamic’s replacement guide lists Producing pads for DT 1990 PRO MKII and describes fitting the pads by threading the rim over the groove and rotating it behind the retaining ring.

Beyerdynamic identifies the included Producing Velours as the slight-bass-boost option and says its back has multiple small acoustic cutouts.

Dekoni’s compatibility list also explicitly names DT1990 MKII. This is first-party product-compatibility evidence, not merely marketplace or community evidence.