Short answer
Both are portable amplifiers, $650 against $599.
The Chord Mojo 2 reaches 100 dB on 566 of the 567 models here, the iFi xDSD Gryphon on 565.
| Specification | Chord Mojo 2 | iFi xDSD Gryphon |
|---|---|---|
| Power into 32Ω | 564 mW | 320 mW |
| Power into 150Ω | 145 mW | 73 mW |
| Power into 300Ω | 90 mW | 40 mW |
| Power into 600Ω | 45 mW | 20 mW |
| Output impedance | 0.06 Ω | 1.0 Ω |
| Output noise | 2.7 µV | not published |
| Price | $650 | $599 |
| Headphones it reaches 100 dB on out of 567 | 566 | 565 |
Not published means the maker leaves it out, so that axis cannot be compared.
| Balanced | Chord Mojo 2 | iFi xDSD Gryphon |
|---|---|---|
| Socket | no separate rating | 4.4mm |
| Power into 32Ω | — | 1.0 W |
| Power into 300Ω | — | 125 mW derived |
| Output impedance | — | 1.0 Ω |
| Output noise | — | not published |
| Headphones it reaches 100 dB on out of 567 | — | 566 |
Only the iFi xDSD Gryphon has a separate balanced rating from its maker; through it, it reaches 100 dB on 566 of the 567 models here. The Chord Mojo 2 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 | Chord Mojo 2 | iFi xDSD Gryphon |
|---|---|---|
| 32 Ω | Derived | Published |
| 150 Ω | Derived | Derived |
| 300 Ω | Published | Published |
| 600 Ω | Derived | Derived |
Both makers publish a power rating. Chord Mojo 2 publishes at 300 Ω; iFi xDSD Gryphon at 32 Ω and at 300 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 iFi xDSD Gryphon 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 Chord Mojo 2 but not on the iFi xDSD Gryphon — Moondrop PARA.
15 headphones are left alone by the Chord Mojo 2 under the one-eighth rule but coloured by the iFi xDSD Gryphon (64 Audio Nio, 64 Audio Volur, Campfire Audio Andromeda 2023, 12 more).
565 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 Audio-Technica ATH-R70X: Chord Mojo 2 has +16 dB of headroom there against +12 dB. 4 dB is about 2.3 times the power, which matters for peaks rather than for how loud the music sits.
The hiss columns are empty for iFi xDSD Gryphon because that maker publishes no output noise figure.
| Headphone | Impedance | Needs | Chord Mojo 2 headroom | iFi xDSD Gryphon headroom | Chord Mojo 2 hiss | iFi xDSD Gryphon hiss |
|---|---|---|---|---|---|---|
| Shure SE846 | 9 Ω | 0.04 mW | +37 dB | +34 dB | 23 dB | not published |
| Campfire Audio Andromeda 2020 | 9 Ω | 4.0 mW | +17 dB | +14 dB | 3 dB | not published |
| Audeze LCD-2 Classic | 70 Ω | 0.79 mW | +25 dB | +23 dB | 1 dB | not published |
| Beyerdynamic DT 1990 Pro (250Ω) | 250 Ω | 0.63 mW | +22 dB | +19 dB | -3 dB | not published |
| HiFiMAN HE400se | 25 Ω | 7.9 mW | +18 dB | +15 dB | -4 dB | not published |
| Audio-Technica ATH-R70X | 470 Ω | 1.6 mW | +16 dB | +12 dB | -10 dB | not published |
| Sennheiser HD 600 | 300 Ω | 6.6 mW | +11 dB | +8 dB | -14 dB | not published |
| HiFiMAN Susvara | 60 Ω | 50 mW | +8 dB | +5 dB | -16 dB | not published |
The Chord Mojo 2 costs $51 more than the iFi xDSD Gryphon. Out of the 567 models here, that difference buys 1 more model driven to 100 dB and 15 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: Chord Mojo 2 and iFi xDSD Gryphon.