The Moondrop SKYLAND is 60Ω with a sensitivity of 83.8 dB/mW, which is 96.0 dB/V. To reach 100 dB SPL — genuinely loud, louder than most people listen — it needs 42 mW, or 1.58 V across the drivers.
That is a demanding load — not impossible from a portable source, but you want a good one. 95 of the 280 sources have at least 10 dB of headroom, 93 more have enough, 47 are marginal and 45 fall short. The cheapest portable source that does the job is the FiiO KA11 at $29.
Sensitivity here is in dB per milliwatt. Why the unit matters.
Moondrop publishes this as 96 dB/Vrms — a figure per volt, not per milliwatt. At 60Ω the two differ by 12.2 dB, so the 83.8 dB/mW above is that published number converted, not a different measurement.
This is the conversion that online calculators skip. Quote the per-volt number as if it were per-milliwatt and this headphone looks 12 dB easier to drive than it is — which is roughly the difference between a dongle being enough and not being enough.
Source: moondroplab.com. How this data was built.
| As it is labelled | As printed | Tolerance | Standard |
|---|---|---|---|
| Frequency Response | 8Hz - 34kHz (IEC61094, FreeField) | not printed | IEC61094 (free field) |
| Effective Frequency Response | 20Hz - 20kHz (IEC60318-4, -3dB) | -3 dB | IEC60318-4 |
Moondrop prints two frequency ranges for the Moondrop SKYLAND. The wide one carries no conditions at all; the narrow one names a measurement standard and a tolerance. Only the second is a specification — the first is a headline.
This is one of only 58 models — out of the 490 whose maker prints a range at all — that also print the tolerance. That is what makes it a specification rather than a headline.
Only what the maker printed; maker by maker.
| Level | What it is | Power | Voltage | Current |
|---|---|---|---|---|
| 85 dB SPL | quiet background listening | 1.3 mW | 0.28 V | 4.7 mA |
| 95 dB SPL | normal listening | 13 mW | 0.89 V | 14.8 mA |
| 100 dB SPL | loud listening | 42 mW | 1.58 V | 26.4 mA |
| 105 dB SPL | very loud | 132 mW | 2.81 V | 46.9 mA |
| 110 dB SPL | peaks on dynamic music | 417 mW | 5.00 V | 83.4 mA |
Most people listen between 75 and 85 dB; the 100 dB row leaves room for peaks.
The 15 cheapest of the 280 sources here that reach 100 dB SPL into 60Ω with at least 10 dB of headroom and no known hiss or output-impedance problem with these headphones. All 280 sources, judged for these headphones.
| Source | Type | Price | Power into 60Ω | Headroom | Verdict |
|---|---|---|---|---|---|
| JDS Labs Atom+ (2nd gen) | desktop amplifier | $99 | 696 mW | +12 dB | Comfortable |
| Schiit Magni Heresy | desktop amplifier | $99 | 1.4 W | +15 dB | Comfortable |
| Schiit Magni+ | desktop amplifier | $109 | 1.1 W | +14 dB | Comfortable |
| Schiit Magni Unity | desktop amplifier | $119 | 1.3 W | +15 dB | Comfortable |
| JDS Labs Atom Amp 2 | desktop amplifier | $129 | 1.4 W | +15 dB | Comfortable |
| Schiit Vali 3 | desktop amplifier | $149 | 870 mW | +13 dB | Comfortable |
| Topping L30 II | desktop amplifier | $149 | 2.0 W | +17 dB | Comfortable |
| SMSL HO100 | desktop amplifier | $160 | 820 mW | +13 dB | Comfortable |
| xDuoo MT-604 | desktop amplifier | $169 | 1.1 W | +14 dB | Comfortable |
| TempoTec Variations V3 Blaze | portable player | $179 | 440 mW | +10 dB | Comfortable |
| FiiO K7 | desktop DAC/amp | $199 | 656 mW | +12 dB | Comfortable |
| iFi Zen CAN | desktop amplifier | $199 | 918 mW | +13 dB | Comfortable |
| Geshelli Archel Pro | desktop amplifier | $200 | 1.0 W | +14 dB | Comfortable |
| Schiit Magni Piety | desktop amplifier | $200 | 706 mW | +12 dB | Comfortable |
| SMSL C200 | desktop DAC/amp | $219 | 693 mW | +12 dB | Comfortable |
Hiss. At 96.0 dB/V these are sensitive enough to reveal a source's own noise floor. The noisiest source in the database, the Schiit Mjolnir 3, would put its hiss at roughly 4 dB SPL in these headphones — faintly audible in a silent room. Check your own source.
Output impedance. At 60Ω these want a source output impedance below 7.50Ω to satisfy the one-eighth rule; 34 of the 192 sources that publish one miss it. Check yours here.
Volume is not the test. Plenty of weak sources will play these loud enough. What runs out first is control on bass peaks, where the current demand spikes well above the average figures in the table. If it sounds loud but soft, that is what you are hearing.
64Ω · 98.1 dB/mW · Easy
See requirements →68Ω · 94.3 dB/mW · Moderate
See requirements →36Ω · 102.6 dB/mW · Easy
See requirements →50Ω · 83.5 dB · Demanding
See requirements →50Ω · 83.5 dB · Demanding
See requirements →60Ω · 83.0 dB · Demanding
See requirements →