EQUIPMENT PAIRING
Open-Fit Flathead Earbud (15.4 mm Titanium-Coated) with Entry-Tier USB-C Dongle DAC (Single CS43131)
Pairing analysis: power headroom, damping factor, output topology and signal path. Good match
Transducer
| Name | Open-Fit Flathead Earbud (15.4 mm Titanium-Coated) |
|---|---|
| Type | Earbud |
| Driver | dynamic · 15.4mm |
| Impedance | 150 Ω |
| Sensitivity | 108 dB/mW |
| Recommended drive | 15 mW |
Device
| Name | Entry-Tier USB-C Dongle DAC (Single CS43131) |
|---|---|
| Category | Portable Dac |
| Topology | Class AB integrated |
| Power @ 32Ω | 130 mW |
| Power @ 300Ω | 45 mW |
| Output impedance | 1.0 Ω |
Analysis
- Power headroom: ~92 mW available at 150Ω. Sufficient for the transducer's sensitivity.
- Damping factor: 150:1. Above the 8:1 audibility threshold; bass response is well-controlled.
- Direct termination: Device offers a matching 3-5mm-trs output jack — no adapter required.
Cable recommendation
If the transducer ships with a detachable cable (fixed), a balanced upgrade cable terminated to one of the device's outputs (3-5mm-trs) gives you the most power and the cleanest signal path. See our balanced cable buyer guide.