The Hidizs MK12 x DucBloke is 32Ω at 111.0 dB (no reference unit printed); the Hidizs MP145 is 30Ω at 104.0 dB (no reference unit printed). This page covers what they ask of an amplifier, not how they sound.
The MP145 needs 7.0 dB more than the MK12 x DucBloke to reach the same loudness — 0.40 mW against 0.08 mW.
| Specification | MK12 x DucBloke | MP145 |
|---|---|---|
| Impedance | 32 Ω | 30 Ω |
| Sensitivity | 111.0 dB | 104.0 dB |
| Sensitivity (voltage) | 125.9 dB/V | 119.2 dB/V |
| Power for 100 dB | 0.08 mW | 0.40 mW |
| Voltage for 100 dB | 50 mV | 0.11 V |
| Current for 100 dB | 1.6 mA | 3.6 mA |
| Highest source impedance that leaves them alone (one-eighth rule) | 4.00 Ω | 3.75 Ω |
| Sources that reach 100 dB out of 280 | 280 | 280 |
One caution before reading the rows. Hidizs MK12 x DucBloke and Hidizs MP145 printed a decibel figure with no reference unit, so this page reads it as per milliwatt. If it is really per volt, each of them needs far more than the table says. Why the two readings differ by so much.
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.
14 sources stay below the audible-hiss threshold with the MP145 but cross it with the MK12 x DucBloke (FiiO BTR11, FiiO K11 R2R, Lake People G103-S Mk II, 11 more).
280 of the 280 sources here reach 100 dB on both.
The MP145 is more demanding than 35% of the 567 non-electrostatic models in this database; the MK12 x DucBloke than 12%.
| dB SPL | MK12 x DucBloke power | MK12 x DucBloke voltage | MP145 power | MP145 voltage |
|---|---|---|---|---|
| 80 | 0.8 µW | 5 mV | 4.0 µW | 11 mV |
| 85 | 2.5 µW | 9 mV | 0.01 mW | 19 mV |
| 90 | 7.9 µW | 16 mV | 0.04 mW | 35 mV |
| 95 | 0.03 mW | 28 mV | 0.13 mW | 61 mV |
| 100 | 0.08 mW | 50 mV | 0.40 mW | 0.11 V |
| 105 | 0.25 mW | 90 mV | 1.3 mW | 0.19 V |
| Source | Price | Headroom, MK12 x DucBloke | Headroom, MP145 | Output impedance | Noise |
|---|---|---|---|---|---|
| JadeAudio JA11 | $20 | 25.8 dB | 18.5 dB | 0.5 Ω | 1.7 µV |
| FiiO KA11 | $29 | 34.0 dB | 27.1 dB | 0.7 Ω | 1.7 µV |
| FiiO BTR13 | $59 | 31.0 dB | 24.0 dB | 0.6 Ω | 1.0 µV |
Of the 280 sources here, 280 reach 100 dB on both. 57 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 57 is the JadeAudio JA11, at $20. It leaves 25.8 dB of headroom on the MK12 x DucBloke and 18.5 dB on the MP145, its output impedance is 0.5 Ω against a one-eighth limit of 4.00 Ω and 3.75 Ω, and its noise figure puts the hiss floor 9 dB and 16 dB below the 20 dB SPL this site treats as the point where a quiet room stops hiding it.
| Model | As printed | Tolerance | Standard |
|---|---|---|---|
| MK12 x DucBloke | 10Hz-45kHz | not printed | not printed |
| MP145 | 20Hz-40kHz effective frequency range | not printed | not printed |
Hidizs prints 10Hz-45kHz for the MK12 x DucBloke and 20Hz-40kHz effective frequency range for the MP145.
MK12 x DucBloke: Hidizs prints this figure in the body copy of the product page. The only specification table on that page belongs to a different product — one of the company’s DAC dongles — and there is no frequency row in a table for this model.
MP145: The figure appears in the product description, not in a specification table, and carries no row label of its own.
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: Hidizs MK12 x DucBloke and Hidizs MP145. Each figure on this page is labelled on those pages with where it came from, including the ones Hidizs never published — what that maker publishes, counted.