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The Hidizs ST2 Pro Nebula are 10mm dynamic driver in-ear monitors designed to cover an extended range from 20Hz to 40kHz, relying on a PU+PEEK composite diaphragm to ensure accurate and consistent reproduction across the full spectrum. They integrate a dual internal/external N52 magnet circuit, increasing flux and driver efficiency to improve transient response and bass control while limiting distortion — an approach further extended by a dual-cavity structure that reduces resonances and preserves fine detail.
The dynamic driver of the Hidizs ST2 Pro Nebula, featuring a PU+PEEK composite diaphragm, ensures accurate and detailed sound reproduction. This driver extends high-frequency rendering, delivering the ST2 Pro Nebula's wide frequency response of 20Hz–40kHz across a broad audio spectrum.


The ST2 Pro 3.5mm earphones are based on a dual internal/external magnetic architecture using N52 magnets, which increases the magnetic flux and the transducer’s efficiency to control the diaphragm’s movements more precisely. This approach improves transient response, extends the bass response whilst reducing distortion, whilst the dual-chamber structure limits unwanted resonances, contributing to a cleaner sound and better preservation of micro-details.
The detachable cable of the Hidizs ST2 Pro Nebula is made from OFC (Oxygen-Free Copper) for highly reliable signal transmission. This choice of material minimises losses and interference, ensuring signal purity from source to ear.

Technical characteristics
| Specifications | |
|---|---|
| Product type | In-ear monitors (IEM) |
| Driver | Dynamic Ø10mm |
| Shell material | Resin + aluminium alloy engraving |
| Frequency response | 20Hz-40kHz |
| Sensitivity | 108dB |
| Impedance | 32Ω |
| Microphone for phone calls | |
| Detachable cable | |
| IEM connector | CIEM 0.78mm |
| Cable termination | 3.5mm jack |
| Cable conductor material | OFC copper (4x260) |
| Cable length | 1.2m |
| General | |
|---|---|
| Color | White |
| Package | 1x Hidizs ST2 Pro Nebula 3x Pairs of ear tips 1x Carrying pouch |
| Color | White |
| Impedance (Ω) | 32 |
| Efficiency / Sensitivity (dB) | 108 |
| Wireless | No |
| Cable termination | Jack 3.5mm |
| Headphone / Earphone connector | CIEM |
| Phone call feature | No |
| Noise reduction | No |