Short answer
Both are desktop amplifiers, $1160 against $1099.
The SMSL VMV P2 MK2 reaches 100 dB on 567 of the 567 models here, the Woo Audio WA6 on 566.
| Specification | SMSL VMV P2 MK2 | Woo Audio WA6 |
|---|---|---|
| Power into 32Ω | 2.0 W | 580 mW |
| Power into 150Ω | 499 mW | 536 mW |
| Power into 300Ω | 300 mW | 460 mW |
| Power into 600Ω | 150 mW | 400 mW |
| Output impedance | <0.1 Ω | not published |
| Output noise | not published | not published |
| Price | $1160 | $1099 |
| Headphones it reaches 100 dB on out of 567 | 567 | 566 |
Not published means the maker leaves it out, so that axis cannot be compared.
| Balanced | SMSL VMV P2 MK2 | Woo Audio WA6 |
|---|---|---|
| Socket | 4.4mm / 4-pin XLR | no separate rating |
| Power into 32Ω | 8.0 W | — |
| Power into 300Ω | 1.0 W | — |
| Output impedance | <0.1 Ω | — |
| Output noise | not published | — |
| Headphones it reaches 100 dB on out of 567 | 567 | — |
Only the SMSL VMV P2 MK2 has a separate balanced rating from its maker; through it, it reaches 100 dB on 567 of the 567 models here. The Woo Audio WA6 may still have a balanced socket — its spec sheet simply gives no figure for one, so there is nothing to put beside it.
| Load | SMSL VMV P2 MK2 | Woo Audio WA6 |
|---|---|---|
| 32 Ω | Published | Published |
| 150 Ω | Derived | Derived |
| 300 Ω | Published | Published |
| 600 Ω | Published | Published |
Both makers publish a power rating. SMSL VMV P2 MK2 publishes at 32 Ω, at 300 Ω and at 600 Ω; Woo Audio WA6 at 32 Ω, at 300 Ω and at 600 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.
1 headphone reaches 100 dB on the SMSL VMV P2 MK2 but not on the Woo Audio WA6 — Symphonium Titan.
566 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 Campfire Audio Andromeda 2020: SMSL VMV P2 MK2 has +28 dB of headroom there against +16 dB. 11 dB is about 14 times the power, which matters for peaks rather than for how loud the music sits.
The hiss columns are empty for SMSL VMV P2 MK2 and Woo Audio WA6 because neither maker publishes no output noise figure.
| Headphone | Impedance | Needs | SMSL VMV P2 MK2 headroom | Woo Audio WA6 headroom | SMSL VMV P2 MK2 hiss | Woo Audio WA6 hiss |
|---|---|---|---|---|---|---|
| Shure SE846 | 9 Ω | 0.04 mW | +48 dB | +36 dB | not published | not published |
| Campfire Audio Andromeda 2020 | 9 Ω | 4.0 mW | +28 dB | +16 dB | not published | not published |
| Audeze LCD-2 Classic | 70 Ω | 0.79 mW | +31 dB | +28 dB | not published | not published |
| Beyerdynamic DT 1990 Pro (250Ω) | 250 Ω | 0.63 mW | +27 dB | +29 dB | not published | not published |
| HiFiMAN HE400se | 25 Ω | 7.9 mW | +25 dB | +18 dB | not published | not published |
| Audio-Technica ATH-R70X | 470 Ω | 1.6 mW | +21 dB | +24 dB | not published | not published |
| Sennheiser HD 600 | 300 Ω | 6.6 mW | +17 dB | +18 dB | not published | not published |
| HiFiMAN Susvara | 60 Ω | 50 mW | +13 dB | +10 dB | not published | not published |
The SMSL VMV P2 MK2 costs $61 more than the Woo Audio WA6. Out of the 567 models here, that difference buys 1 more model 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: SMSL VMV P2 MK2 and Woo Audio WA6.