Short answer
Both are desktop DAC/amps, $1499 against $1600.
On raw power they are level: each reaches 100 dB on 567 of the 567 non-electrostatic models here.
| Specification | Matrix mini-i Pro 4 | Violectric V226 |
|---|---|---|
| Power into 32Ω | 1.2 W | 2.2 W |
| Power into 150Ω | 366 mW | 2.6 W |
| Power into 300Ω | 260 mW | 1.8 W |
| Power into 600Ω | 130 mW | 900 mW |
| Output impedance | 11 Ω | 0.25 Ω |
| Output noise | not published | 6.15 µV |
| Price | $1499 | $1600 |
| Headphones it reaches 100 dB on out of 567 | 567 | 567 |
Not published means the maker leaves it out, so that axis cannot be compared.
| Balanced | Matrix mini-i Pro 4 | Violectric V226 |
|---|---|---|
| Socket | 4.4mm | balanced |
| Power into 32Ω | 2.1 W derived | 2.2 W |
| Power into 300Ω | 950 mW | 1.8 W |
| Output impedance | 22 Ω | 0.5 Ω |
| Output noise | not published | 6.15 µV |
| Headphones it reaches 100 dB on out of 567 | 567 | 567 |
Through the balanced sockets the two are level on the same test: each reaches 100 dB on 567 of the 567 models here. Derived figures are worked out from the loads the maker did publish.
| Load | Matrix mini-i Pro 4 | Violectric V226 |
|---|---|---|
| 32 Ω | Derived | Published |
| 150 Ω | Derived | Derived |
| 300 Ω | Published | Published |
| 600 Ω | Published | Published |
Both makers publish a power rating. Matrix mini-i Pro 4 publishes at 300 Ω and at 600 Ω; Violectric V226 at 32 Ω, at 300 Ω and at 600 Ω. The other rows are worked out from those.
So the two columns are not equally firm row by row: at 32 Ω only the Violectric V226 figure is the maker’s own. On those rows the derived number is the one to doubt first.
On power they are interchangeable across this whole database: there is no headphone here that one reaches 100 dB on and the other does not.
520 headphones are left alone by the Violectric V226 under the one-eighth rule but coloured by the Matrix mini-i Pro 4 (64 Audio Aspire 1, 64 Audio Fourte, 64 Audio Nio, 517 more).
567 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 Beyerdynamic DT 1990 Pro (250Ω): Violectric V226 has +35 dB of headroom there against +26 dB. 8 dB is about 7 times the power, which matters for peaks rather than for how loud the music sits.
The hiss columns are empty for Matrix mini-i Pro 4 because that maker publishes no output noise figure.
| Headphone | Impedance | Needs | Matrix mini-i Pro 4 headroom | Violectric V226 headroom | Matrix mini-i Pro 4 hiss | Violectric V226 hiss |
|---|---|---|---|---|---|---|
| Shure SE846 | 9 Ω | 0.04 mW | +39 dB damping | +43 dB | not published | 30 dB |
| Campfire Audio Andromeda 2020 | 9 Ω | 4.0 mW | +19 dB damping | +23 dB | not published | 10 dB |
| Audeze LCD-2 Classic | 70 Ω | 0.79 mW | +29 dB damping | +36 dB | not published | 8 dB |
| Beyerdynamic DT 1990 Pro (250Ω) | 250 Ω | 0.63 mW | +26 dB | +35 dB | not published | 4 dB |
| HiFiMAN HE400se | 25 Ω | 7.9 mW | +21 dB damping | +24 dB | not published | 3 dB |
| Audio-Technica ATH-R70X | 470 Ω | 1.6 mW | +20 dB | +29 dB | not published | -3 dB |
| Sennheiser HD 600 | 300 Ω | 6.6 mW | +16 dB | +24 dB | not published | -7 dB |
| HiFiMAN Susvara | 60 Ω | 50 mW | +12 dB damping | +18 dB | not published | -9 dB |
The Violectric V226 costs $101 more than the Matrix mini-i Pro 4. Out of the 567 models here, that difference buys 520 more models left alone under the one-eighth rule.
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: Matrix mini-i Pro 4 and Violectric V226.