A Smaller, More Accessible Zana Deux. With great control of the entire frequency range and a far bigger sound than its small size suggests, the Massdrop x Eddie Current ZDT Jr. rivals tube amps in the $1,500 category. Endorsed by Craig Uthus of JBL, Moth Audio, and Eddie Current fame, it’s based on the Night Blues Mini from his longtime
But the Retrospekt headband uses the same ball joint that Koss’s 60 ohm drivers use, so I swapped on some Porta Pro drivers, fitted matching orange Yaxi pads, and last night I sacrificed a donor 2-pin IEM cable from Hakugei to solder directly onto the Porta Pro drivers. Now I have this. Discover 1179 Community discussions, tips, and reviews on Massdrop x Koss Porta Pro X Headphones from the Audiophile enthusiast community on Drop. icE8.