The NiceHCK DB2 is 16Ω at 107.0 dB/mW; the NiceHCK F1 Pro is 16Ω at 104.0 dB/mW. This page covers what they ask of an amplifier, not how they sound.
The F1 Pro needs 3.0 dB more than the DB2 to reach the same loudness — 0.40 mW against 0.20 mW.
| Specification | DB2 | F1 Pro |
|---|---|---|
| Impedance | 16 Ω | 16 Ω |
| Sensitivity | 107.0 dB/mW | 104.0 dB/mW |
| Sensitivity (voltage) | 125.0 dB/V | 122.0 dB/V |
| Power for 100 dB | 0.20 mW | 0.40 mW |
| Voltage for 100 dB | 57 mV | 80 mV |
| Current for 100 dB | 3.5 mA | 5.0 mA |
| Highest source impedance that leaves them alone (one-eighth rule) | 2.00 Ω | 2.00 Ω |
| Sources that reach 100 dB out of 280 | 280 | 280 |
Every source in the database that drives one of them drives the other. On power, the choice between these two changes nothing about what amplifier you need.
7 sources stay below the audible-hiss threshold with the F1 Pro but cross it with the DB2 (FiiO K11 R2R, Lake People G103-S Mk II, Schiit Valhalla 3, 4 more).
280 of the 280 sources here reach 100 dB on both.
The F1 Pro is more demanding than 26% of the 567 non-electrostatic models in this database; the DB2 than 14%.
| dB SPL | DB2 power | DB2 voltage | F1 Pro power | F1 Pro voltage |
|---|---|---|---|---|
| 80 | 2.0 µW | 6 mV | 4.0 µW | 8 mV |
| 85 | 6.3 µW | 10 mV | 0.01 mW | 14 mV |
| 90 | 0.02 mW | 18 mV | 0.04 mW | 25 mV |
| 95 | 0.06 mW | 32 mV | 0.13 mW | 45 mV |
| 100 | 0.20 mW | 57 mV | 0.40 mW | 80 mV |
| 105 | 0.63 mW | 0.10 V | 1.3 mW | 0.14 V |
| Source | Price | Headroom, DB2 | Headroom, F1 Pro | Output impedance | Noise |
|---|---|---|---|---|---|
| JadeAudio JA11 | $20 | 18.8 dB | 15.8 dB | 0.5 Ω | 1.7 µV |
| FiiO KA11 | $29 | 30.9 dB | 27.9 dB | 0.7 Ω | 1.7 µV |
| FiiO BTR13 | $59 | 27.8 dB | 24.8 dB | 0.6 Ω | 1.0 µV |
Of the 280 sources here, 280 reach 100 dB on both. 62 of them also publish an output impedance low enough for both under the one-eighth rule and a noise figure that stays below the audible-hiss threshold with both.
The cheapest of the 62 is the JadeAudio JA11, at $20. It leaves 18.8 dB of headroom on the DB2 and 15.8 dB on the F1 Pro, its output impedance is 0.5 Ω against a one-eighth limit of 2.00 Ω for both, and its noise figure puts the hiss floor 10 dB and 13 dB below the 20 dB SPL this site treats as the point where a quiet room stops hiding it.
| Model | As printed | Tolerance | Standard |
|---|---|---|---|
| DB2 | 20 Hz – 20 kHz | not printed | not printed |
| F1 Pro | 20Hz-28kHz | not printed | not printed |
NiceHCK prints 20 Hz – 20 kHz for the DB2. Concept Kart, a retailer lists 20Hz-28kHz for the F1 Pro. That figure stands on Concept Kart, a retailer, not on a document published by the maker.
Neither range has a tolerance printed beside it, so a wider range on one sheet is not deeper bass or more treble.
Not a measurement; maker by maker.
Both have a page of their own. In full: NiceHCK DB2 and NiceHCK F1 Pro. Each figure on this page is labelled on those pages with where it came from, including the ones NiceHCK never published — what that maker publishes, counted.