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RME Fireface UCX 36 Channel USB & Firewire audio interface

RME Fireface UCX

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Product Code : UCX


RME Fireface UCX 36 Channel USB & Firewire audio interface

36-Channel, 192 kHz USB & FireWire Audio Interface, 9 1/2", 1RU

The Fireface UCX is a highly integrated pro audio solution in an ultra-compact format for studio and live recordings. It continues RME's long tradition of designing compact high-end interfaces, packing into a half-rack size unit what usually would be spread out over two or three 19 inch panels.

In doing this the Fireface UCX marks a new packing record: 300 electronic components more than inside the already well-stocked Fireface UC! In a tremendous effort RME packed once again all the latest technologies, introduced with the award winning flagship UFX, plus a bunch of newly developed ones, into a half 19 inch housing with full mobile usability.

The result is an awesome combination of RME's most successful products: Fireface UFX, Firefaces UC/400 and Babyface. The Fireface UCX is not just a smaller version of the smash hit UFX, with the HFX-core, the preamps and the complete effects engine. The UCX continues the tradition of RME's tremendously successful compact interfaces, and combines it with the Babyface's usability through the optional RME remotes. With the Fireface UCX RME reinvented an already perfect product, by improving existing features and characteristics plus adding sophisticated new ones:

  • Low Latency mastering grade converters with outstanding specifications.
  • Two mic preamps with the premium technology from RME's high-end recording bestsellers Micstasy and UFX, including the AutoSet overload protection.
  • A newly developed Hammerfall audio core, supporting USB and FireWire with the maximum performance and ultra-low latency operation, combined with the legendary RME driver stability and maintenance, on both bus protocols.
  • TotalMix FX with the complete Fireface UFX DSP engine, including all effects up to 192 kHz.
  • Monitoring Controller: combining the impressive flexibility of the TotalMix FX monitoring tool set and the optional RME Remote Control.
  • RME's unique DIGICheck metering and analysis toolbox for Windows PC and Mac.
  • Plus support for RME's Advanced Remote Control, active jitter suppression technology, professional reference level support, advanced stand-alone functionality, full 192 kHz operation, and last but not least two high speed MIDI I/Os.
  • On top of it: The Fireface UCX is the first professional audio interface with Class Compliant mode to work with Apple's iPad, for perfect stereo up to 18 channel recording and playback, and the addition of truly professional I/Os.

So the UCX is a half rack unit, which is actually more powerful, than most 19 inch units. All in all the Fireface UCX is the new compact-sized dream interface, created with care for every detail, and a new premium solution for any desktop and live usage, without compromises in sound, stability and ultra-low latency operation.

See also:
Frequently asked questions
Differences to Fireface UFX and Fireface UC/400


Inputs and Outputs

The UCX provides 36 channels of audio - 18 I/Os. All channels can be used at the same time. Up to 8 analog and 10 digital channels can be recorded onto 18 separate tracks. All outputs can be used for ASIO Direct Monitoring purposes.

Available I/O (channels) with different Sample Rates:

Sample Rate Analog SPDIF ADAT Total In/Out
44.1/48 kHz 8/8 2/2 8/8 18/18
88.2/96 kHz 8/8 2/2 4/4 14/14
176.4/192 kHz 8/8 2/2 2/2 12/12

Overview Analog I/O


  • Inputs 5-8 (TRS - balanced)
  • Output 1-6 (TRS - balanced)


  • Inputs: 1/2 (2 x XLR/TRS Combo - balanced)
  • Inputs: 3/4 (2 x TRS - balanced)
  • Outputs: 7/8 - Phones (TRS - Stereo)

Analog I/O

The UCX provides 8 analog I/O in a very flexible combination:

8 Inputs. On the rear: 4 balanced TRS. On the front: 2 XLR inputs with Mic/Line preamps (65 dB Gain) and 2 Hi-Z capable TRS Line/Instrument inputs..

8 Outputs . On the rear: 6 balanced TRS outputs. On the front: One additional TRS stereo phones (playback channels 7/8). The high power phones output offers high volumes even with high-impedance headphones.

Sound Quality . Equipped with a new 2011 A/D and D/A high-performance converter design all I/Os operate at up to 192 kHz. The AD/DA conversion supersedes the outstanding technical specifications of the Fireface UC/400 with an impressive 114 dBA dynamic range on both record and playback. The advanced multi-bit converter architecture guarantees excellent S/N and THD specs across a wide analog level range. In the best RME tradition and product philosophy, the UCX converters and preamps have no characteristic "sound" of their own. They neither add nor remove anything, but capture the original signal just as it is.

Due to its efficient jitter reduction, RME's superior SteadyClockTM finalizes the state-of-the-art AD/DA conversion, even when clocking to an external digital source.

Low Latency Converters . All analog I/Os use a low latency converter design with impressive 14 samples for the ADC, and 7 samples for the DAC, independent of the used sample rate. These values are about a quarter of the Fireface UC/400 (43/28), and even outperform much more expensive devices. A technical breakthrough that reduces the overall latency of timing critical applications, in live situations, and in computer-based recording studios. The converter latency is so low (0.4 ms at 48 kHz) that it can be ignored, turning analog digital monitoring into real analog-style monitoring!

Professional Level Support . A great converter needs to support the common studio levels for the perfect adaptation to other analog equipment without loosing headroom. Like all other RME devices the UCX supports the common professional studio levels: -10 dBV, +4 dBu, Lo / HiGain. The software-controlled reference levels, realized discretely in the analog domain, ensure highest dynamic range and fidelity.
- Inputs 3 to 8: -10 dBV, +4 dBu and Lo Gain (adjustable in two groups - channels 3/4 and 5 to 8).
- Outputs 1 to 8: -10 dBV, +4 dBu and Hi Gain (adjustable in two groups - channels 1 to 6 and 7/8).

All outputs can be used for ASIO Direct Monitoring purposes.

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