RME Fireface UCX II
MRP - Rs. 1,91,844
RME Fireface UCX II 40-channel USB interface: 2 mic preamps, 8 analog I/O, ADAT, AES/EBU, SPDIF, DURec recording, SteadyClock FS and stand-alone use. Available in India from Shivansh Electronics, Kolkata, West Bengal, India.
VISUAL GUIDE — See Every Photo, Spec & Setup Step (PDF)
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General
| Type | 40‑channel 192 kHz advanced USB audio interface |
| Channels | 20 inputs / 20 outputs at 48 kHz (8 analog, 8 ADAT, 2 AES/EBU, 2 SPDIF each way) |
| Computer connection | 1 x USB 2.0 (works with USB 2.0 and USB 3.0 ports) |
| Supported sample rates | 28 kHz up to 200 kHz; up to 192 kHz |
| Buffer sizes | 48 to 8192 samples |
| Clock sources | Internal, ADAT, AES, SPDIF, word clock |
| Clock technology | SteadyClock FS; jitter suppression of external clocks > 50 dB (> 1 Hz) |
| Mixer | TotalMix FX: 800‑channel mixer, 46‑bit internal resolution; 3‑band EQ, Low Cut, Reverb, Echo, Compressor, Expander, Auto Level, Room EQ |
| Recording | DURec to USB memory up to 2 TB |
| Modes | Driver‑based USB 2, Class Compliant, stand‑alone (6 memory states) |
Inputs and outputs
| Mic/line inputs 1‑2 | 2 x XLR/TRS combo (front), 48V phantom power, AutoSet |
| Line/instrument inputs 3‑4 | 2 x 6.3 mm TRS/TS (front), line balanced or instrument 1 MOhm |
| Line inputs 5‑8 | 4 x 6.3 mm TRS, balanced (rear) |
| Line outputs 1‑6 | 6 x 6.3 mm TRS, servo‑balanced, DC‑coupled (rear) |
| Headphone output (7‑8) | 1 x 6.3 mm TRS stereo (front) |
| ADAT | 1 x TOSLINK I/O |
| AES/EBU and SPDIF | 1 x AES/EBU I/O (XLR) + 1 x SPDIF coaxial I/O (RCA) via breakout cable |
| Word clock | 1 x BNC I/O, switchable 75 Ohm termination |
| MIDI | 1 x MIDI I/O on 5‑pin DIN |
| USB‑A port | DURec recording; alternatively ARC USB |
Audio performance
| Mic in 1‑2 | |
|---|---|
| Connector | XLR, balanced |
| SNR / dynamic range (A‑weighted) | 115 dB |
| THD+N | < -104 dB |
| Max level | +18 dBu (gain 0 dB) |
| Line in 1‑2 | |
| Connector | TRS, balanced |
| SNR / dynamic range (A‑weighted) | 115 dB |
| THD+N | < -104 dB |
| Max level | +24 dBu (gain 0 dB) |
| Line/Inst in 3‑4 | |
| Connector | 6.3 mm TRS/TS |
| SNR / dynamic range (A‑weighted) | 115 dB |
| THD+N | < -104 dB |
| Max level | +19 dBu line +13 dBu inst |
| Line in 5‑8 | |
| Connector | 6.3 mm TRS, balanced |
| SNR / dynamic range (A‑weighted) | 115 dB |
| THD+N | < -104 dB |
| Max level | +19 dBu |
| Line out 1‑6 | |
| Connector | 6.3 mm TRS, servo‑balanced |
| SNR / dynamic range (A‑weighted) | 115 dB |
| THD+N | < -104 dB |
| Max level | +19 dBu |
| Phones 7‑8 | |
| Connector | 6.3 mm TRS stereo |
| SNR / dynamic range (A‑weighted) | 115 dB |
| THD+N | < -104 dB |
| Max level | +19 dBu (High) |
Analog details
| Mic gain range | 75 dB |
| Mic EIN (A‑weighted) | -128 dBu (60 dB gain, 150 Ohm, 20 Hz - 20 kHz) |
| Mic input impedance | 5.4 kOhm |
| SNR / dynamic range (unweighted) | 112 dB (line inputs and outputs) |
| THD | Inputs < -110 dB; outputs < -108 dB |
| Line input sensitivity (5‑8) | Switchable +19 dBu / +13 dBu, variable gain 0 to +12 dB |
| Line output levels | +19, +13, +4 dBu switchable; 75 Ohm output impedance |
| Phones | +19 dBu (High) / +4 dBu (Low); 1 Ohm; 210 mW per channel into 32 Ohm |
| Frequency response | AD: 5 Hz - 20.8 kHz (-0.1 dB, 44.1 kHz); DA: 0 Hz - 20.8 kHz (-0.5 dB, 44.1 kHz) |
| Channel separation | > 110 dB |
Digital
| ADAT | 8 channels at 48 kHz; 4 at 96 kHz (S/MUX); 2 at 192 kHz (S/MUX4) |
| AES/EBU | AES3‑1992, transformer‑balanced; Professional and Consumer formats; 27 - 200 kHz |
| SPDIF coaxial | IEC 60958; 27 - 200 kHz |
| Word clock | Level range 1.0 - 5.6 Vpp; 27 - 200 kHz; output 4.0 Vpp into 75 Ohm |
Physical
| Dimensions (W x H x D) | 21.5 x 4.4 x 13.0 cm without rack ears (body depth) 25.8 x 4.4 x 15.5 cm incl. rack ears, full depth |
| Weight | 910 g |
| Power | External power supply, 12 V DC, lockable connector |
| Typical power consumption | 13 W |
| Operating temperature | +5 to +50 °C |
System requirements
| Windows | RME driver for Windows |
| Mac | RME driver for macOS (Intel and ARM) |
| Class Compliant | iOS, Windows, macOS and Linux |
| Computer port | 1 x USB 2.0 or USB 3.0 port, at least Intel Core i3 CPU |
Included software
| Mixer | TotalMix FX |
| Remote | TotalMix Remote |
| Analysis | DIGICheck |
Product overview
The RME Fireface UCX II is a 40-channel 192 kHz advanced USB audio interface in a half-rack format: 8 analog inputs and outputs, ADAT, AES/EBU, SPDIF, word clock and MIDI, with DURec recording, a colour display and full stand-alone operation.
The front panel holds two mic/line preamps on XLR/TRS combo sockets, two digitally controlled line/instrument inputs, a high-power headphone output, four keys, an encoder and a colour display. At the rear are four balanced line inputs, six balanced line outputs, ADAT I/O, AES/EBU and coaxial SPDIF on a breakout cable, word clock and MIDI. SteadyClock FS, TotalMix FX with DSP effects and Room EQ, DC-coupled outputs for CV/Gate, and Class Compliant mode for iOS and other operating systems complete the package.
| Channels at 48 kHz (20 in / 20 out) | 40 |
| Max sample rate | 192 kHz |
| Mic EIN (A‑weighted) | -128 dBu |
| Mic gain range | 75 dB |
Key features
- 20 inputs / 20 outputs: 8 analog, 8 ADAT, 2 AES/EBU and 2 SPDIF each way
- 2 x mic/line preamps with 75 dB gain range, 48V phantom power and AutoSet overload protection
- 2 x line/instrument inputs on the front, Hi-Z 1 MOhm
- 6 x balanced line outputs, switchable +19, +13 and +4 dBu, all DC-coupled for CV/Gate
- High-power headphone output: 210 mW into 32 Ohm, 1 Ohm output impedance
- DURec: record and play back all inputs and outputs directly to USB memory
- Full stand-alone operation with colour display, six memory states and MIDI control
- SteadyClock FS femtosecond clock and jitter-rejection technology
- TotalMix FX with EQ, dynamics, reverb, echo and Room EQ
- Class Compliant mode for iOS, Windows, macOS and Linux; ARC USB support
DURec: Direct USB Recording
DURec records all inputs and outputs directly to USB thumb drives or hard drives with up to 2 TB capacity via the rear USB port. Recording runs on the internal DSP, independent from a connected computer, turning the Fireface UCX II into what RME calls a stand-alone field recorder and multichannel live player, for example for virtual soundchecks. Each channel can be chosen individually for recording and playback.
Full stand-alone functionality
Four keys, the encoder, the high-resolution colour display and a well thought-out menu give direct access to every function from the front panel. Internal memory stores six complete states of the unit, so the Fireface UCX II can work without a computer and change role at the click of a button. TotalMix FX can also be controlled via MIDI.
TotalMix FX and Room EQ
The TotalMix FX DSP mixer creates multiple latency-free monitor mixes, in RME's words, with EQ, dynamics, reverb and delay for every output, including main monitors and headphone mixes. Room EQ adds a 9-band parametric EQ with delay and volume calibration. TotalMix Remote mirrors the complete mixer on an iPad or another computer over Ethernet and WiFi, and DIGICheck measures and analyses the audio data.
DC-coupled outputs for CV/Gate
All line-level outputs are fully DC-coupled, so they can send control voltages and gate signals to modular synthesisers and other studio hardware alongside normal audio.
SteadyClock FS and Class Compliant mode
SteadyClock FS is based on a femtosecond clock and reduces intrinsic jitter when converting from and to analog over all digital formats. In Class Compliant mode the operating system recognises the unit directly, giving professional analog I/O to iOS devices and other platforms without a proprietary driver.
In the box
- RME Fireface UCX II
- USB 2.0 cable, 1.8 m
- Optical cable (TOSLINK), 2 m
- B0968 digital breakout cable (XLR/RCA)
- External switched power supply, lockable connector, 12 V DC, 24 W
- Power cord
Free RME software: TotalMix FX, TotalMix Remote and DIGICheck. Drivers for Windows and macOS; Class Compliant for iOS and Linux.
RME Fireface UCX II: frequently asked questions
Can the Fireface UCX II record without a computer?
Yes. DURec records all inputs and outputs to a USB thumb drive or hard drive (up to 2 TB) using the internal DSP, independent from a connected computer.
Does it work with an iPad?
Yes. In Class Compliant mode no driver is needed, and TotalMix FX can be used directly from the iPad.
Can I control modular synthesisers?
Yes. All line outputs are DC-coupled and can send CV and gate signals, and MIDI I/O controls external gear.
How is it powered?
By the included external power supply (12 V DC, lockable connector).
Where can I buy the RME Fireface UCX II in India?
The RME Fireface UCX II is available from Shivansh Electronics, Kolkata, West Bengal, India, with delivery across India.
Workflow 1: Project studio recording and mixing
A complete desktop studio: mics, instruments, keyboards, monitors and headphones in one half-rack unit.
Connections
| Connect | To |
|---|---|
| Vocal mic | Mic/line input 1, 48V on |
| Guitar or bass | Instrument input 3 |
| Stereo keyboard | Line inputs 5‑6 |
| Studio monitors | Line outputs 1‑2 |
| Headphones | Front phones output |
| Computer | USB 2.0 |
Setup
- Install the RME driver and select the Fireface UCX II in your recording software.
- Set mic gain from the front panel display; AutoSet protects against overload.
- Build latency-free headphone mixes with EQ and reverb in TotalMix FX.
- Adjust monitor volume with the main volume knob.
Tip: Use Room EQ in TotalMix FX to calibrate your monitors with the 9-band PEQ and delay.
Workflow 2: Live recording with DURec
Record a gig, rehearsal or jam session straight to a USB drive.
Connections
| Connect | To |
|---|---|
| Stage mics or mixer outputs | Mic and line inputs 1‑8 |
| Extra 8 channels from an ADAT preamp | ADAT IN |
| USB thumb drive or hard drive (up to 2 TB) | Rear DURec USB port |
| Headphones | Front phones output |
Setup
- Plug in the USB drive and open the DURec page on the display.
- Select the input channels to record.
- Press record on the unit; recording runs on the internal DSP.
- Play the recording back through the outputs for a virtual soundcheck.
Workflow 3: Stand-alone mic preamp and monitor mixer
Use the Fireface UCX II without a computer as a preamp, AD/DA converter or monitor mixer.
Connections
| Connect | To |
|---|---|
| Mics | Mic/line inputs 1‑2 |
| Digital mixer or recorder | ADAT or AES/EBU I/O |
| Monitors or in‑ear system | Line outputs 1‑6 |
| Power supply | DC input |
Setup
- Set up the routing and mixes in TotalMix FX with a computer connected.
- Store the state in one of six memory slots.
- Disconnect the computer: the unit keeps working stand-alone.
- Recall a different setup from the front panel at the click of a button.
Workflow 4: Modular synth and CV/Gate studio
Control modular synthesisers and record them alongside software instruments.
Connections
| Connect | To |
|---|---|
| Modular CV/Gate inputs | DC‑coupled line outputs 3‑6 |
| Modular audio outputs | Line inputs 5‑8 |
| MIDI synth | MIDI I/O |
| Monitors | Line outputs 1‑2 |
| Computer | USB 2.0 |
Setup
- Route CV and gate tracks from your software to outputs 3-6.
- Set the output level so the voltage range suits your modules.
- Record the modules' audio on inputs 5-8.
- Sequence external MIDI gear via the MIDI port.
Tip: Keep CV outputs at a fixed level in TotalMix FX so pitch control stays accurate.
Workflow 5: iPad recording rig
Professional analog inputs and outputs for recording and mixing on an iPad.
Connections
| Connect | To |
|---|---|
| Mics and instruments | Inputs 1‑4 |
| iPad | USB, via a suitable adapter |
| Headphones | Front phones output |
| Power supply | DC input |
Setup
- Set the Fireface UCX II to Class Compliant mode.
- Connect it to the iPad and select it in your recording app.
- Mix directly from the iPad with TotalMix FX.
- Save mixes and setups for the next session.
Workflow 6: Podcast and streaming studio
Mics, instruments and computer audio in one broadcast mix.
Connections
| Connect | To |
|---|---|
| Host and guest mics | Mic/line inputs 1‑2 |
| Music or jingle player | Line inputs 5‑6 |
| Headphones | Front phones output |
| Computer | USB 2.0 |
Setup
- Set mic gains and add EQ and compression in TotalMix FX.
- Use loopback in TotalMix FX to send computer playback back to your streaming software.
- Build a separate headphone mix for the host.
- Record a backup of the whole show with DURec.
