Detail 01
40 channels of analog and digital I/O
The USB interface combines mic/line connections with ADAT, AES/EBU, SPDIF, MIDI, and word clock.
Product detailSKU #1500000359384
RMEFireface UCX II USB Audio Interface
1/8
Independent shopping perspective
The Korena take
RME's Fireface UCX II places 40 channels of analog and digital I/O in a half-rack USB 2.0 interface for compact studio and mobile rigs. Front-panel access covers two mic/line combo preamps and two instrument-ready line inputs, while the wider connection set includes ADAT, AES/EBU, SPDIF, MIDI, and word clock. It can run without a computer, save six presets, and use DURec to record or play back from USB storage. TotalMix FX adds routing, unlimited submixes, and onboard processing across every output.
Strong match
Who this is for
- Compact studio or mobile rigs needing analog and digital connections in a half-rack interface.
- Recording rehearsals, shows, or sessions directly to USB storage without a computer.
- Creating separate output mixes with TotalMix FX routing and onboard effects processing.
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
DC-coupled analog outputs
They can output control voltage for modular synths and creative routing.
Detail 03
Stand-alone operation
Settings can be configured and up to six presets saved without a computer.
Detail 04
DURec
It records to and plays back from USB storage devices for standalone multitrack recording or virtual soundcheck use.
Detail 05
Class Compliant mode
It works plug-and-play with macOS, Windows, and Linux without driver installation.
Detail 06
Dimensions without rack ears
The body measures 8.5 x 1.73 x 5.1 inches (215 x 44 x 130 mm).
Final check
Know before you order
- 01Computer-free recording and playback use a USB storage device.
- 02The rear USB port supports RME's ARC USB remote controller.
- 03Full TotalMix FX routing and mixing uses the RME driver suite; Class Compliant mode needs no driver installation.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Can the UCX II record without a computer?
Yes. DURec records directly to USB storage devices, and the interface can also operate standalone.
02How many microphone preamps are on the front panel?
It has two mic/line combo preamps, plus two instrument-ready line inputs.
03Does it work without drivers?
In Class Compliant mode, it works plug-and-play with macOS, Windows, and Linux without driver installation.
04Can it control modular synths?
Yes. Its analog outputs are DC-coupled for control-voltage output to modular synths.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
2 detailsSound
- Input impedance
- 10 kOhm balanced, 5 kOhm unbalanced
- Output impedance
- 10 ohm
13 detailsConnections & power
- Maximum input level, +19 dBu, Gain 0dB
- Line +19 dBu, Inst +13 dBu
- Output voltage @ 75 ohm termination
- 4.0 Vpp
- Maximum input level, Gain 75dB
- -51 dBu
- Maximum output level at 0 dBFS, Low
- +4 dBu
- Current at 12 Volt operating voltage
- 910 mA (11W)
- Supported sample rates
- 28kHz up to 200kHz
- Maximum input level, Gain 0dB
- +24 dBu
- Typical power consumption
- 13W
- Maximum output level at 0 dBFS, High
- +19 dBu
- Max power per channel @ 32 Ohm load, 0.1% THD
- 210 mW (2.6 Vrms, +10.5 dBu)
- Max. output voltage
- 5 Vpp
- Maximum input level, +13 dBu, Gain 12dB
- Line +1 dBu, Inst -5 dBu
- Maximum output level
- +19dBu
2 detailsSize & weight
- Dimensions incl. rack ears, full depth (WxHxD)
- 10.5" x 1.73" x 6.1", 265 x 44 x 155 mm
- Dimensions without rack ears, body depth (WxHxD)
- 8.5" x 1.73" x 5.1", 215 x 44 x 130 mm
43 detailsOther
- Relative humidity
- < 75%, non condensing
- Jitter suppression
- > 50dB (2.4kHz)
- THD+N
- < -104dB, < 0.00063 %
- Input
- TRS, electronically balanced
- Signal Adaptation Circuit
- signal refresh through auto-center and hysteresis
- Hi-speed mode
- Jitter and response time typically below 1 ms
- Temperature range
- +5° up to +50° Celsius (41°F up to 122°F)
- Jitter suppression of external clocks
- > 50dB (2.4kHz)
- Lock Range
- 27kHz–200kHz
- Internal termination
- 75 Ohm switchable
- Additional Gain stage
- 0 up to +12dB
- Input mode
- Line balanced (TRS), Inst unbalanced (TS)
- Frequency response @ 96kHz, -0.5dB
- 5Hz–45kHz
- Korena Special
- false
- EIN
- -128 dBu A-weighted, 60dB gain,150 Ohm, 20Hz–20kHz
- Weight
- 910 g (2 lb)
- Channel separation
- > 110dB
- Effective clock jitter influence on AD and DA conversion
- near zero
- Resolution
- 24-bit
- Clocks
- Internal, ADAT, AES, SPDIF, word clock
- Frequency response @ 192kHz, -1dB
- 5Hz–89kHz
- Standard
- 8 channels 24-bit, up to 48kHz
- Power supply
- external power supply
- Output level
- Professional 1.2 Vpp, Consumer 0.6 Vpp
- Resolution AD
- 24 bit
- THD
- < -108dB, < 0.0004 %
- Dynamic range (DR)
- 112dB RMS unweighted, 115 dBA
- Tier
- new
- Input Gain Inst
- +6dB
- Frequency response @ 44.1kHz, -0.5dB
- 5Hz–20.8kHz
- Output
- 6.3 mm TRS stereo jack, unbalanced
- Gain range
- 75dB
- Variable gain
- 0 to +12dB
- Frequency response @ 44.1kHz, -0.1dB
- 5Hz–20.8kHz
- Category Source
- detail
- Quad Speed (S/MUX4)
- 2 channels 24-bit/192kHz
- Frequency range
- 27kHz–200kHz
- Minimum level for 0 dBFS
- +1 dBu, -1.2 dBV
- Lock range
- 31.5kHz–50kHz
- Level range
- 1.0 Vpp – 5.6 Vpp
- Double Speed (S/MUX)
- 4 channels 24-bit/96kHz
- Signal to Noise ratio (SNR)
- 112dB RMS unweighted, 115 dBA
- Source Id
- site51500000359384
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