FIR Audio Krypton 5 Universal In-Ear Monitor OPEN-BOX *The voltage selector is on

*The voltage selector is on the bottom of the EF400

Sealed-back ear cup construction with incredible Bordeaux lacquer finish

The front panel knob adjusts the volume of the headphone output

The straight earphone plug would be in the way

Tech savvy

FIR Audio Krypton 5 Universal In-Ear Monitor OPEN-BOX *The voltage selector is onKrypton 5 The pinnacle of 5 driver portable sound. The Krypton 5 is a technical performer with outstanding quality and clarity. Handling each note, instrument and layer with delicacy and care. Snappy impactful bass forms the backbone to the Krypton 5s textured presentation. Making for a crystal clear, enjoyable audiophile IEM. The Krypton 5 features machined aluminum shells, sapphire crystal glass faceplates, is outfitted with 4 balanced armature