Short answer: the RME Fireface UFX III on measured measured performance, the RME Babyface Pro FS on price. The RME Fireface UFX III ranks #9 of 17 audio interfaces, rated 3.7/5, at $3,199. The RME Babyface Pro FS ranks #10, rated 3.6/5, at $849, $2,350 cheaper.
Why pick the RME Fireface UFX III: Audio Science Review measured 110 dB SINAD, clean for nearly all listening. The tradeoff: RME doesn’t publish a 32 ohm headphone power figure, so its ability to drive demanding headphones is unknown.
The case for the RME Babyface Pro FS: Audio Science Review measured 108 dB SINAD from its outputs, clean enough for nearly all listening. The catch: It costs far more than the MOTU M2, which measured a higher SINAD and rates higher.
Buy the RME Fireface UFX III if measured performance is the priority over the price, or the RME Babyface Pro FS if the price is the priority over measured performance.
Want more options? Browse the full Headphone Amps and DACs rankings.
Specifications Side By Side
| RME Fireface UFX III | RME Babyface Pro FS | |
|---|---|---|
| Price | $3,199.00 | $849.00 |
| Ranked | #9 of 17 in Audio Interfaces | #10 of 17 in Audio Interfaces |
| Device Type | Audio interface | Audio interface |
| SINAD | 110 dB (measured by Audio Science Review) | 108 dB (measured by Audio Science Review) |
| Headphone Outputs | 2 x 6.35 mm | 2 (6.35 mm and 3.5 mm) |
| Dimensions | 17.3” x 1.7” x 8.3” (440 x 44 x 210 mm) (without rack ears) | 4.3” x 1.4” x 7.1” (108 x 35 x 181 mm) |
| Weight | 6.2 lbs (2.8 kg) | 1.5 lbs (680 g) |
| Equalizer | Yes (TotalMix FX DSP) | - |
| Inputs | - | 2 XLR mic/line, 2 6.35 mm line/instrument, optical ADAT/S/PDIF, USB |
| Outputs | - | 2 XLR line, 2 headphone |
| Balanced Output | - | Yes (XLR outs) |
| Volume Control | - | Hardware knob |
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- MOTU 624 vs RME Fireface UFX III
Prices on this page were last checked October 13, 2026 at 3:17 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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The Two Amps and DACs In Full
RME Fireface UFX III: $3,199.00 Amazon $3,199.00 eBay
Pros: Audio Science Review measured 110 dB SINAD, clean for nearly all listening. It has two 6.35 mm headphone outputs and TotalMix FX DSP with built in EQ, in a full rack width chassis.
Cons: RME doesn’t publish a 32 ohm headphone power figure, so its ability to drive demanding headphones is unknown. It is large and heavy at 2.8 kg, and for playback it rates below the MOTU M6, which measures slightly cleaner for a small fraction of the cost.
Full RME Fireface UFX III review and specifications →
| Device Type | Audio interface |
|---|---|
| Dimensions | 17.3” x 1.7” x 8.3” (440 x 44 x 210 mm) (without rack ears) |
| Equalizer | Yes (TotalMix FX DSP) |
| Headphone Outputs | 2 x 6.35 mm |
| SINAD | 110 dB (measured by Audio Science Review) |
| Weight | 6.2 lbs (2.8 kg) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
RME Babyface Pro FS: $849.00 Amazon $849.00 eBay
Pros: Audio Science Review measured 108 dB SINAD from its outputs, clean enough for nearly all listening. It is well equipped, with two XLR mic inputs, two instrument inputs, optical ADAT or S/PDIF input, balanced XLR monitor outputs and two headphone jacks (6.35 mm and 3.5 mm). Audio Science Review praised its compact hardware and noted it runs without an external power supply.
Cons: It costs far more than the MOTU M2, which measured a higher SINAD and rates higher. RME doesn’t publish a 32 ohm power figure, and Audio Science Review found the headphone output fine for casual monitoring but short on power for difficult or low impedance headphones.
Full RME Babyface Pro FS review and specifications →
| Released | 2019 (7 years ago) |
|---|---|
| Balanced Output | Yes (XLR outs) |
| Device Type | Audio interface |
| Dimensions | 4.3” x 1.4” x 7.1” (108 x 35 x 181 mm) |
| Headphone Outputs | 2 (6.35 mm and 3.5 mm) |
| Inputs | 2 XLR mic/line, 2 6.35 mm line/instrument, optical ADAT/S/PDIF, USB |
| Outputs | 2 XLR line, 2 headphone |
| SINAD | 108 dB (measured by Audio Science Review) |
| Volume Control | Hardware knob |
| Weight | 1.5 lbs (680 g) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons