UM Mest Jet Black

A good and truly unique IEM

First of all, the transaction and communication with Musicteck were absolutely top-notch. Constant updates, clear explanations, real help, an irresistible offer, and shipping to Europe in under five days with no suprise extra charges. Second: the earphone. I own several full-size headphones across different price ranges, and plenty of IEMs. I even have the MEST MKII second-hand. This one is special. It has a more mature tuning than its predecessors. It won’t give you an immediate “WOW,” but if you have good music with you, this earphone becomes wonderful when paired with a solid DAP. Luckily, I have the DX340 with AMP16, and I’m using the Effect Audio Eros II as the cable partner. It’s correctly incorrect—maybe sitting right in the middle thanks to that soundstage—slightly bright, holographic, and with flawless timbre. To sum it up: the sound is super-holographic, exciting, and genuinely unique. This also means it won’t be a safe bet for everyone, so I’d recommend borrowing or demoing it before you decide.

From Just Awful to Absolutely Wonderful

Ordered just iem with no cable. Put an OCC cable, made by a respected cable maker, on the JetBlack. It was just awful. Scratchy, way to edgy, excessive treble and a total lack of tonal balance. Pulled out a cheap copper cable and tried on the JetBlack. OMG, tonality, balance, dynamics, and imaging was just outstanding. All the excessive edginess disappeared. Ordered the Link Custom cable from MusicTeck. The sound got better and better. What a difference a matched cable makes. Added a minor EQ and the JetBlack is now a a joy to listen to. Live and learn.