Patented Dynamic Drivers, Knowles Balanced Armatures

To heighten the hybrid listening experience, you have to curate the right drivers. Better yet: you can develop your own. In the MS4 IEM, Hidizs did both. To deliver smooth lows, subtle highs, and excellent all-frequency consistency, the company patented a new 10.2-millimeter dynamic driver with a macromolecular diaphragm just for the MS4. To complement it with extra articulation in mids and highs, they added a Knowles 33518 high-frequency balanced armature and a 30017 dual-composite balanced armature. Rounding out the MS4’s custom-tailored sound, a four-strand OFC silver-plated copper cable ensures pristine signal transmission with near-zero oxidation risk. Surrounding the drivers, CNC’d aluminum housings maximize durability, while resin shells optimize comfort in the ear.

Hidizs MS4 IEM
Hidizs MS4 IEM



  • Hidizs
  • Drivers: (1) custom 10.2 mm dynamic driver with macromolecular diaphragm, (1) Knowles 33518 balanced armature, (1) Knowles 30017 dual-composite driver
  • Impedance: 12 ohms (1 kHz)
  • Sensitivity: 112 dB/mW
  • Frequency response: 15 Hz – 40 kHz
  • Cable: 5N OFC silver-plated copper, braided (4 strands)
  • Connector: 0.78 mm, 2-pin
  • Termination: 3.5 mm
  • Cable length: 3.9 ft (1.2 m)


  • Set of eartips
  • Carrying case


Estimated ship date is May 26, 2021 PT.

Payment will be collected at checkout. After this product run ends, orders will be submitted to the vendor up front, making all orders final.

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