Does the Drop THX AAA 789 drive the HiFiMan Edition XS?
Computed from measured specifications · target SPL 110 dB · load 16 Ω
Verdict
AmpleThe Drop THX AAA 789 drives the HiFiMan Edition XS with ample headroom (~16.6 dB headroom at 16 ohms; needs ~66.1 mW, delivers 3000 mW).
16.6 dB
66.1 mW
3000 mW
0.98 Vrms
| Impedance (rated) | 18 Ω |
| Impedance (measured) Source: reference-audio-analyzer.pro/en/r… | 14.4 Ω measured |
| Sensitivity | 91.8 dB/mW measured |
| Driver | Planar |
| Spec basis | Measured |
| Output impedance manufacturer | 0.1 Ω |
| Power @ 16 Ω | 3000 mW |
| Power @ 32 Ω | 1800 mW |
| Power @ 300 Ω | 200 mW |
| Power @ 600 Ω | 100 mW |
| Power source | Manufacturer |
Planar-magnetic headphones can have high current demands that are not fully captured by the power headroom model. Even with adequate headroom, some solid-state amps may struggle to deliver sufficient peak current for transient dynamics. Prefer amps rated for low-impedance planars.
Where to buy
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Other amplifiers for the HiFiMan Edition XS
| Amplifier | Headroom |
|---|---|
| Schiit Lyr 3 | Ample 19.6 dB |
| Schiit Asgard 3 | Ample 18.8 dB |
| Topping DX3 Pro+ | Ample 14.4 dB |
| FiiO K7 | Ample 12.7 dB |
| Little Dot MkII | Marginal 1.8 dB |
| Apple USB-C to 3.5mm | Insufficient -3.3 dB |
Other headphones the Drop THX AAA 789 can drive
| Headphone | Headroom |
|---|---|
| Koss Porta Pro | Ample 28.2 dB |
| Grado SR80x | Ample 27.9 dB |
| HiFiMan Arya | Ample 17.5 dB |
| AKG K702 | Ample 16.9 dB |
| Beyerdynamic DT 770 Pro 250 | Adequate 7.5 dB |
| Beyerdynamic DT 990 Pro | Adequate 6.4 dB |