Short answer
Both are desktop amplifiers, both at $3000.
The SPL Phonitor xe reaches 100 dB on 567 of the 567 models here, the McIntosh MHA200 on 566.
| Specification | McIntosh MHA200 | SPL Phonitor xe |
|---|---|---|
| Power into 32Ω | 500 mW | 2.7 W |
| Power into 150Ω | 475 mW | 3.7 W |
| Power into 300Ω | 485 mW | 4.2 W |
| Power into 600Ω | 500 mW | 2.1 W |
| Output impedance | not published | 0.18 Ω |
| Output noise | not published | 5.48 µV |
| Price | $3000 | $3000 |
| Headphones it reaches 100 dB on out of 567 | 566 | 567 |
Not published means the maker leaves it out, so that axis cannot be compared.
| Balanced | McIntosh MHA200 | SPL Phonitor xe |
|---|---|---|
| Socket | no separate rating | balanced |
| Power into 32Ω | — | 700 mW |
| Power into 300Ω | — | 2.9 W derived |
| Output impedance | — | 0.36 Ω |
| Output noise | — | 9.75 µV |
| Headphones it reaches 100 dB on out of 567 | — | 566 |
Only the SPL Phonitor xe has a separate balanced rating from its maker; through it, it reaches 100 dB on 566 of the 567 models here. The McIntosh MHA200 may still have a balanced socket — its spec sheet simply gives no figure for one, so there is nothing to put beside it. Derived figures are worked out from the loads the maker did publish.
| Load | McIntosh MHA200 | SPL Phonitor xe |
|---|---|---|
| 32 Ω | Published | Published |
| 150 Ω | Derived | Derived |
| 300 Ω | Derived | Derived |
| 600 Ω | Published | Derived |
Both makers publish a power rating. McIntosh MHA200 publishes at 32 Ω and at 600 Ω; SPL Phonitor xe at 32 Ω. The other rows are worked out from those.
So the two columns are not equally firm row by row: at 600 Ω only the McIntosh MHA200 figure is the maker’s own. On those rows the derived number is the one to doubt first.
1 headphone reaches 100 dB on the SPL Phonitor xe but not on the McIntosh MHA200 — 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 Beyerdynamic DT 1990 Pro (250Ω): SPL Phonitor xe has +39 dB of headroom there against +29 dB. 10 dB is about 10 times the power, which matters for peaks rather than for how loud the music sits.
The hiss columns are empty for McIntosh MHA200 because that maker publishes no output noise figure.
| Headphone | Impedance | Needs | McIntosh MHA200 headroom | SPL Phonitor xe headroom | McIntosh MHA200 hiss | SPL Phonitor xe hiss |
|---|---|---|---|---|---|---|
| Shure SE846 | 9 Ω | 0.04 mW | +35 dB | +43 dB | not published | 29 dB |
| Campfire Audio Andromeda 2020 | 9 Ω | 4.0 mW | +15 dB | +23 dB | not published | 9 dB |
| Audeze LCD-2 Classic | 70 Ω | 0.79 mW | +28 dB | +35 dB | not published | 7 dB |
| Beyerdynamic DT 1990 Pro (250Ω) | 250 Ω | 0.63 mW | +29 dB | +39 dB | not published | 3 dB |
| HiFiMAN HE400se | 25 Ω | 7.9 mW | +17 dB | +24 dB | not published | 2 dB |
| Audio-Technica ATH-R70X | 470 Ω | 1.6 mW | +25 dB | +32 dB | not published | -4 dB |
| Sennheiser HD 600 | 300 Ω | 6.6 mW | +19 dB | +28 dB | not published | -8 dB |
| HiFiMAN Susvara | 60 Ω | 50 mW | +10 dB | +17 dB | not published | -10 dB |
These two cost the same, $3000, so price settles nothing. Out of the 567 models here, the SPL Phonitor xe drives one model to 100 dB — and on the other side there is no such advantage at all.
Only published figures count here; blank axes are counted separately.
Each in full: McIntosh MHA200 and SPL Phonitor xe.