Short answer
Both are audio interfaces, $329 against $340.
The M-Audio AIR 192|14 reaches 100 dB on 563 of the 567 models here, the Roland BRIDGE CAST on 558.
| Specification | M-Audio AIR 192|14 | Roland BRIDGE CAST |
|---|---|---|
| Power into 32Ω | 160 mW | 78 mW |
| Power into 150Ω | 34 mW | 36 mW |
| Power into 300Ω | 17 mW | 29 mW |
| Power into 600Ω | 8.5 mW | 15 mW |
| Output impedance | not published | 10 Ω |
| Output noise | not published | not published |
| Price | $329 | $340 |
| Headphones it reaches 100 dB on out of 567 | 563 | 558 |
Not published means the maker leaves it out, so that axis cannot be compared.
| Load | M-Audio AIR 192|14 | Roland BRIDGE CAST |
|---|---|---|
| 32 Ω | Published | Published |
| 150 Ω | Derived | Derived |
| 300 Ω | Derived | Derived |
| 600 Ω | Derived | Derived |
Both makers publish a power rating. M-Audio AIR 192|14 publishes at 32 Ω; Roland BRIDGE CAST at 32 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.
5 headphones reach 100 dB on the M-Audio AIR 192|14 but not on the Roland BRIDGE CAST — Moondrop COSMO, Moondrop PARA 2, Moondrop VENUS, 2 more.
558 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 HiFiMAN HE400se: M-Audio AIR 192|14 has +12 dB of headroom there against +9 dB. 3 dB is about 2.1 times the power, which matters for peaks rather than for how loud the music sits.
The hiss columns are empty for M-Audio AIR 192|14 and Roland BRIDGE CAST because neither maker publishes no output noise figure.
| Headphone | Impedance | Needs | M-Audio AIR 192|14 headroom | Roland BRIDGE CAST headroom | M-Audio AIR 192|14 hiss | Roland BRIDGE CAST hiss |
|---|---|---|---|---|---|---|
| Shure SE846 | 9 Ω | 0.04 mW | +31 dB | +27 dB damping | not published | not published |
| Campfire Audio Andromeda 2020 | 9 Ω | 4.0 mW | +11 dB | +7 dB damping | not published | not published |
| Audeze LCD-2 Classic | 70 Ω | 0.79 mW | +20 dB | +18 dB damping | not published | not published |
| Beyerdynamic DT 1990 Pro (250Ω) | 250 Ω | 0.63 mW | +15 dB | +17 dB | not published | not published |
| HiFiMAN HE400se | 25 Ω | 7.9 mW | +12 dB | +9 dB damping | not published | not published |
| Audio-Technica ATH-R70X | 470 Ω | 1.6 mW | +8 dB | +11 dB | not published | not published |
| Sennheiser HD 600 | 300 Ω | 6.6 mW | +4 dB | +6 dB | not published | not published |
| HiFiMAN Susvara | 60 Ω | 50 mW | +2 dB | +0 dB damping | not published | not published |
The Roland BRIDGE CAST costs $11 more than the M-Audio AIR 192|14, and on these three axes the money buys nothing: among the 567 models here there is not one that the Roland BRIDGE CAST handles and the M-Audio AIR 192|14 does not — not on power, not on the one-eighth rule, not on hiss. The traffic runs the other way: the cheaper M-Audio AIR 192|14 drives 5 models to 100 dB that the Roland BRIDGE CAST does not.
Only published figures count here; blank axes are counted separately.
Each in full: M-Audio AIR 192|14 and Roland BRIDGE CAST.