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Audio Interface

RME Fireface UFX III

The Fireface UFX III is RME's flagship USB interface, renowned for rock-solid drivers and ultra-low latency that make it a favorite for live playback rigs. With MADI support providing up to 64 additional channels, it scales well for large track count shows. RME's TotalMix FX routing matrix is exceptionally powerful for complex monitor routing, and the unit can operate standalone as a mixer even without a connected computer.

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Photos

Manufacturer product photography — the drawn faceplate stays true to panel layout; these show the hardware itself.

Photo: RMEClick to zoom
Documented outputs
33 destination connections
Required cable runs
1madi bnc
Rack space
1UBuilder checks available rail space
Power draw
30W40W documented maximum
Catalog estimate
~$3,199Use retailer rows for current price and stock

01 · What it does—and what that changes in your rig.

Product overview

Start with the payoff, then work through how it functions, where it fits, and the details that change a real build.

The payoff

Audio Interface decisions, organized around the whole rig.

The Fireface UFX III is RME's flagship USB audio interface, and in a live context it earns its place as the nerve center of a serious playback or IEM rig. The combination of four front-panel mic/line inputs, two XLR outputs, and a full 64-channel MADI port in a single rack unit means you can receive stems from a stagebox, feed IEM transmitters directly, and still have analog I/O headroom for confidence outputs or a click feed — all without a patchbay full of compromises. The standalone TotalMix FX routing matrix means it can keep passing audio even when the host computer is misbehaving, which matters more than almost any spec on a show day.

Documented outputs
33 destination connections
Required cable runs
1madi bnc
Rack space
1UBuilder checks available rail space
RMEFireface UFX III48.0kHzUSB3 SYNC9101112
RME product panel1U · 30W
Function

How it works in the path

Thirty watts nominal draw and a 240mm depth make it genuinely rack-friendly — this sits cleanly in a standard 4U tour case alongside a laptop shelf and a power conditioner without fighting for space. The USB 3 connection keeps latency low enough that even triggering-sensitive playback workflows stay comfortable, and RME's driver stability reputation is well-earned across Windows and macOS. The MADI BNC ports are the real force multiplier: 64 channels in and 64 out over a single coax run lets you interface directly with a digital console's MADI expansion or a dedicated MADI splitter without eating rack space on a separate converter. At a 94-channel total count, you are unlikely to hit a ceiling on anything short of a full theatrical or stadium show.

Best fit

Where it earns its place in the rack

This is the right call if you are running Ableton, QLab, or similar on a dedicated playback machine and need a single box that handles the audio interface, monitor routing, and digital transport duties with professional reliability. The $3,199 price point is significant, and it is honest to say that a smaller act running eight stereo IEM mixes from a single MacBook may find the RME UCX II or a competitor's mid-tier USB interface perfectly sufficient. Where the UFX III justifies itself is in complex rigs — multi-act festival packages, touring productions with large stem counts, or any situation where the cost of a show stoppage from a driver crash or a routing limitation exceeds the cost of the upgrade.

In the rack

Details worth deciding before load-in.

  • Route your IEM mixes entirely within TotalMix FX and save a snapshot before every show — the standalone mode means you have a fallback if the playback computer needs a restart between sets.
  • Use the MADI BNC output to feed a console's MADI input for house or FOH reference sends; it keeps your analog outputs free for dedicated monitor or transmitter feeds and eliminates a DA converter from the chain.
  • The IEC power inlet means a standard locking IEC cable keeps it secure in a touring case — use one, because a kicked power cable during a show is a solved problem that doesn't need to happen.
  • If your rack depth is tight, confirm the 240mm body plus BNC connector clearance before you commit to a shallow case; the MADI cables need a gentle bend radius and crowding them against a rear panel will cause problems over time.

02 · Know the whole path before you buy.

Signal path

Learn the route as a block diagram: source, product function, transport, and destination. Select any block to see what enters, what changes, and what leaves.

Interactive block diagramAuto-looping · hover, focus, or tap to hold a stage
Port-type signalProduct functionSystem boundary
Follow one signal from source to destination

Each block answers the same three questions: what arrives, what changes here, and what leaves.

01 · Source · selected
01 · Source

6 documented inputs

XLR female + madi bnc

Arrives as
6 documented inputs
Connector
XLR female + madi bnc
Signal
analog audio

03 · What this product asks of the rest of the system.

Compatibility

Treat connector names as the start of the check—not the answer. These are the boundaries that determine a complete working path.

Best fit · Audio Interface

Use it when 1U and 240 mm of depth fit the case.

Plan the companion path

Complete the path with upstream and downstream gear that matches connector, direction, signal type, protocol, and wiring standard.

Connector boundary

Documented connectors: XLR female, XLR male, madi bnc, usb c. Match connector, direction, and signal type—not shape alone.

04 · Every connector, grouped by job.

I/O ports

Switch the product view and the documented port inventory updates with it—hardware and data stay side by side.

Every connector, grouped by job.

Switch panels to keep the hardware view and the documented port list in sync.

Front panel
RMEFireface UFX III48.0kHzUSB3 SYNC9101112
Rear panel
RMEFireface UFX III
All documented ports for RME Fireface UFX III
PortPanelConnectorDirectionSignalChannels
Mic/Line In 1 (XLR)rearXLR female inputanalog audio—
Mic/Line In 2 (XLR)rearXLR female inputanalog audio—
Mic/Line In 3 (XLR)rearXLR female inputanalog audio—
Mic/Line In 4 (XLR)rearXLR female inputanalog audio—
Line Out 1 (XLR)rearXLR male outputanalog audio—
Line Out 2 (XLR)rearXLR male outputanalog audio—
MADI In (BNC)rearmadi bnc inputdigital audio64
MADI Out (BNC)rearmadi bnc outputdigital audio64
USB 3rearusb c bidirectionaldata—
Power (IEC)rearIEC C14 inputpower—

Showing 10 of 10 documented physical ports.

05 · Compare the decision, not just the price.

Alternatives

The rows are organized around fit, power, I/O, and system role so a cheaper unit cannot hide a more expensive workflow.

Compare
RME Fireface UFX III
RME Babyface Pro FS
RME Digiface Dante
Fit📐 1U📐 Outside rack📐 Outside rack
Power⚡ 30W⚡ 8W⚡ 10W
Weight⚖️ 6.4 lb⚖️ 1.3 lb⚖️ 1.5 lb
I/O🔌 10🔌 5🔌 6
Estimate💵 ~$3,199💵 ~$999💵 ~$1,749
Deep diveCurrent selectionFull comparison →Full comparison →

06 · Resolve the questions that can change the purchase or build plan.

Planning questions

Short, source-backed answers surface rack fit, power, cabling, and connection details before they become surprises.

How will the RME Fireface UFX III affect rack fit and case depth?

It occupies 1U. Its documented depth is 240 mm.

How much power does the RME Fireface UFX III draw?

Typical draw is 30W and documented maximum draw is 40W.

What connections does the RME Fireface UFX III have?

10 documented physical ports, including Mic/Line In 1 (XLR), Mic/Line In 2 (XLR), Mic/Line In 3 (XLR), Mic/Line In 4 (XLR), Line Out 1 (XLR), Line Out 2 (XLR).

07 · See this unit inside a real rack plan.

Builder preview

Placement is only the start. Builder checks space · depth · weight, power headroom, dependencies, and compatible signal paths around this exact catalog item.Open in Builder
Fireface UFX III positioned in a rack planA simplified plan shows the unit taking 1 rack units, with its documented connection path continuing to a planned destination.RMEFireface UFX IIICONNECTED GEARnext signal destination1U · 240 mm deep

08 · Related gear, in the order you may need it.

Planning guides for audio interface systems.