Beyerdynamic DT 900 PRO X vs Truthear Hexa (IEM)
A spec-by-spec look at two of the gaming headphones competitive players cross-shop. Beyerdynamic DT 900 PRO X is open-back — the wider, more accurate stage images footsteps and gunfire in space better than the iem Truthear Hexa (IEM). For pure positional audio it's the competitive pick; the iem wins on isolation (noisy rooms, LAN). The full breakdown — and which to buy for your style — below.
Specs compared
| Spec | Beyerdynamic DT 900 PRO X | Truthear Hexa (IEM) | Better |
|---|---|---|---|
| Type | Open-back | IEM | Beyerdynamic DT 900 PRO X |
| Impedance | 48 Ω | 20.5 Ω | Even |
| Sensitivity | 100 dB/mW | 120 dB/V | Even |
| Power for 110 dB peaks | ~10.0 mW | ~4.9 mW | Truthear Hexa (IEM) |
| Price class | Premium | Budget | Truthear Hexa (IEM) |
Sound reproduction
Footstepsedge5/5 ✓3/5
General use4/54/5
Music4/55/5 ✓
Only Footsteps is a competitive axis — and it saturates: any clean open-back clears the bar, so a higher score above baseline buys little advantage. General use & Music are comfort/preference.
Imaging notewide open stage, sharp imaging; cleaner, less-harsh Beyer trebleIEM; in-head narrow stage but precise imaging, excellent neutral tone
Which should you buy?
- Beyerdynamic DT 900 PRO X is open-back — the wider, more accurate stage images footsteps and gunfire in space better than the iem Truthear Hexa (IEM). For pure positional audio it's the competitive pick; the iem wins on isolation (noisy rooms, LAN).
- Truthear Hexa (IEM) needs only ~4.9 mW for clean 110 dB peaks vs ~10.0 mW for the Beyerdynamic DT 900 PRO X — easier to run loud and clean off a modest amp or even a dongle. The Beyerdynamic DT 900 PRO X rewards (or needs) a real amp.
- Beyerdynamic DT 900 PRO X grades higher for footstep imaging (5/5 vs 3/5) — the one axis that's a real competitive edge. But it saturates: any clean open-back clears the bar, so a higher score above baseline buys little. General-use and music grades are comfort/preference, not advantage.
- Truthear Hexa (IEM) is the more affordable class — Budget vs Premium. Put the saving toward an amp that drives it properly before jumping a price tier.
Specs are sourced (each product carries a source + verified date in our catalog); buy links are affiliate links to your regional store — AimBench may earn a commission at no cost to you. Live pricing shows on the retailer page.
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