Cable upgrade for various IEMs. Made to order - can be configured to work with custom IEMs from Unique Melody, Ultimate Ears, Westone, 1964 Ears, etc. Can also be configured for Sennheiser IE8 and possibly other brands/models (you have to ask).
Unique Melody Miracle
Flagship 6 driver custom in ear monitor
Fostex TH-X00 Massdrop exclusive
Exclusive project by Fostex, commissioned by (and available exclusively from) Massdrop
Grace Design m9XX compact USB DAC with integrated headphone amp
Exclusive design commissioned and co-designed by Massdrop, taking the far more expensive Grace...
Unique Melody Merlin
Hybrid custom in ear monitor: quad balanced armature drivers plus a dynamic driver in a three way...
Compact USB DAC/amp