Short answer
Both are dongles, $22 against $20.
The FiiO SnowSky Tiny A reaches 100 dB on 550 of the 567 models here, the JadeAudio JA11 on 547.
| Specification | FiiO SnowSky Tiny A | JadeAudio JA11 |
|---|---|---|
| Power into 32Ω | 34 mW | 30 mW |
| Power into 150Ω | 7.3 mW | 6.4 mW |
| Power into 300Ω | 3.6 mW | 3.2 mW |
| Power into 600Ω | 1.8 mW | 1.6 mW |
| Output impedance | 0.5 Ω | 0.5 Ω |
| Output noise | not published | 1.7 µV |
| Price | $22 | $20 |
| Headphones it reaches 100 dB on out of 567 | 550 | 547 |
Not published means the maker leaves it out, so that axis cannot be compared.
| As published | FiiO SnowSky Tiny A | JadeAudio JA11 |
|---|---|---|
| Outputs | 3.5 mm | 3.5 mm (TRRS, supports CTIA/OMTP in-line controls) |
| Connection | Direct plug-in USB-C (no cable); extra USB-C charging port for listen-and-charge | USB-C, attached Type-C cable |
| Formats | PCM 384 kHz/32-bit, DSD256 | PCM 384 kHz/32-bit, DSD128 (DoP only; no native DSD) |
| Microphone | In-line controls and call recording supported | In-line headset microphone and remote supported (calls, recording); enable in FiiO Control app |
| Weight | not published | 5 g |
| Dimensions | not published | About 11 x 9 x 90 mm (body, cable included) |
Copied from the makers’ own pages: fiio.com/tiny, jadeaudio.com/details, fiio.com/newsinfo/928503.html. Battery life is the maker’s own test figure.
| Load | FiiO SnowSky Tiny A | JadeAudio JA11 |
|---|---|---|
| 32 Ω | Published | Published |
| 150 Ω | Derived | Derived |
| 300 Ω | Derived | Derived |
| 600 Ω | Derived | Derived |
Both makers publish a power rating. FiiO SnowSky Tiny A publishes at 32 Ω; JadeAudio JA11 at 32 Ω. The other rows are worked out from those.
The two publish at the same loads, which is the one case where the rows of this table can be read straight across.
3 headphones reach 100 dB on the FiiO SnowSky Tiny A but not on the JadeAudio JA11 — Kinera Freya Vanir, Symphonium Giant, Thieaudio Hype 10.
547 of the 567 models here reach 100 dB on both.
Headroom is at a 100 dB SPL peak.
The widest gap on the list is the Shure SE846: FiiO SnowSky Tiny A has +28 dB of headroom there against +23 dB. 5 dB is about 3 times the power, which matters for peaks rather than for how loud the music sits.
The hiss columns are empty for FiiO SnowSky Tiny A because that maker publishes no output noise figure.
| Headphone | Impedance | Needs | FiiO SnowSky Tiny A headroom | JadeAudio JA11 headroom | FiiO SnowSky Tiny A hiss | JadeAudio JA11 hiss |
|---|---|---|---|---|---|---|
| Shure SE846 | 9 Ω | 0.04 mW | +28 dB | +23 dB | not published | 19 dB |
| Campfire Audio Andromeda 2020 | 9 Ω | 4.0 mW | +8 dB | +3 dB | not published | -1 dB |
| Audeze LCD-2 Classic | 70 Ω | 0.79 mW | +13 dB | +12 dB | not published | -3 dB |
| Beyerdynamic DT 1990 Pro (250Ω) | 250 Ω | 0.63 mW | +8 dB | +8 dB | not published | -7 dB |
| HiFiMAN HE400se | 25 Ω | 7.9 mW | +7 dB | +5 dB | not published | -8 dB |
| Audio-Technica ATH-R70X | 470 Ω | 1.6 mW | +2 dB | +1 dB | not published | -14 dB |
| Sennheiser HD 600 | 300 Ω | 6.6 mW | -3 dB | -3 dB | not published | -18 dB |
| HiFiMAN Susvara | 60 Ω | 50 mW | -4 dB | -5 dB | not published | -20 dB |
The FiiO SnowSky Tiny A costs $2 more than the JadeAudio JA11. Out of the 567 models here, that difference buys 3 more models driven to 100 dB.
Nothing runs the other way: there is no axis here on which the cheaper of the two does better.
Only published figures count here; blank axes are counted separately.
Each in full: FiiO SnowSky Tiny A and JadeAudio JA11.