Tribrid Flagship IEM (1 DD + 4 BA + 2 EST)
Specifications
| Category | Iem |
|---|---|
| Brand | Reference Audio |
| Driver type | Hybrid |
| Driver size | 9 (DD) mm |
| Driver count | 7 per side (1 DD + 4 BA + 2 EST) |
| Impedance | 18 Ω |
| Sensitivity | 106 dB/mW |
| Frequency response | 5 Hz – 60 kHz |
| THD | 0.15 % |
| Cable termination | detachable |
| Recommended amp power | 20 mW |
| Tuning target | Harman in-ear (modified for EST extension) |
| Weight | 9.8 g |
| Price (USD) | $1899 |
| Release year | 2024 |
Overview
Tribrid flagship IEM: one 9 mm dynamic driver for sub-bass, four balanced armatures for midrange and treble, and two Sonion electrostatic super-tweeters above 8 kHz. Three driver topologies, each placed where it excels — the technical apex of universal-IEM engineering.
Pentaconn Ear detachable connector at the earpieces ensures connector wear isn’t the failure mode after years of cable rolling. 18 Ω / 106 dB/mW. The EST tweeters extend cleanly to 60 kHz with mass three orders of magnitude below a BA, which is why the top octave sounds vanishingly low-distortion.
The right cable matters more here than on simpler IEMs because of the EST tweeter’s voltage-bias requirement — the monocrystal silver IEM cable is the canonical pairing. Driver-topology context in our driver types guide.
Earpiece / cable connector
Pentaconn Ear — Premium IEM Connector
2.5mm · 2-pole 2-pin
Recommended source devices
Reference Portable Digital Audio Player (Dual ES9038Q2M)
650mW @ 32Ω · Dap
Mid-Tier Compact Balanced DAP (ES9219C)
240mW @ 32Ω · Dap
Desktop Integrated DAC + Headphone Amp (ES9039Pro)
1800mW @ 32Ω · Dac Amp