01 · Source
11 documented inputs
XLR/TRS combo + ¼-inch TRS
- Arrives as
- 11 documented inputs
- Connector
- XLR/TRS combo + ¼-inch TRS
- Signal
- analog audio
Audio Interface
RME Fireface UCX II
RME Fireface UCX II USB Audio Interface. Plan its source-defined physical connections and placement in your rig.
- Documented outputs
- 99 destination connections
- Documented inputs
- 11Based on documented inputs
- Rack space
- 1U · half-rackBuilder checks available rail space
- Power draw
- 13WDocumented typical draw
- Catalog estimate
- ~$1,699Use 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.
RME Fireface UCX II USB Audio Interface. Plan its source-defined physical connections and placement in your rig.
- Documented outputs
- 99 destination connections
- Documented inputs
- 11Based on documented inputs
- Rack space
- 1U · half-rackBuilder checks available rail space
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
01 · Source · selectedEach block answers the same three questions: what arrives, what changes here, and what leaves.
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 · half-rack and 130 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/TRS combo, ¼-inch TRS, db9, dc barrel. 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.
| Port | Panel | Connector | Direction | Signal | Channels |
|---|---|---|---|---|---|
| MIC / LINE 1 | front | XLR/TRS combo | input | analog audio | — |
| MIC / LINE 2 | front | XLR/TRS combo | input | analog audio | — |
| LINE / INSTRUMENT 3 | front | ¼-inch TRS | input | analog audio | — |
| LINE / INSTRUMENT 4 | front | ¼-inch TRS | input | analog audio | — |
| HEADPHONES / LINE 7–8 | front | ¼-inch TRS | output | analog audio | — |
| AES/EBU & S/PDIF · BREAKOUT | rear | db9 | bidirectional | digital audio | — |
| DC POWER · CENTER POSITIVE | rear | dc barrel | input | power | — |
| USB 2.0 · TO HOST | rear | usb b | bidirectional | data | — |
| USB DURec / ARC USB | rear | usb a | bidirectional | data | — |
| WORD CLOCK · IN / OUT | rear | bnc | bidirectional | data | — |
| ADAT OUT / OPTICAL SPDIF | rear | toslink | output | digital audio | — |
| ADAT IN / OPTICAL SPDIF | rear | toslink | input | digital audio | — |
| MIDI OUT | rear | midi din5 | output | data | — |
| MIDI IN | rear | midi din5 | input | data | — |
| LINE OUT 5 | rear | ¼-inch TRS | output | analog audio | — |
| LINE OUT 6 | rear | ¼-inch TRS | output | analog audio | — |
| LINE OUT 3 | rear | ¼-inch TRS | output | analog audio | — |
| LINE OUT 4 | rear | ¼-inch TRS | output | analog audio | — |
| LINE OUT 1 | rear | ¼-inch TRS | output | analog audio | — |
| LINE OUT 2 | rear | ¼-inch TRS | output | analog audio | — |
| LINE IN 7 | rear | ¼-inch TRS | input | analog audio | — |
| LINE IN 8 | rear | ¼-inch TRS | input | analog audio | — |
| LINE IN 5 | rear | ¼-inch TRS | input | analog audio | — |
| LINE IN 6 | rear | ¼-inch TRS | input | analog audio | — |
Showing 24 of 24 documented physical ports. Scroll to review the remaining rows.
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 |  |  | ||
|---|---|---|---|---|
| Fit | 📐 1U · half-rack | 📐 Outside rack | 📐 Outside rack | 📐 1U |
| Power | ⚡ 13W | ⚡ 8W | ⚡ 10W | ⚡ Unverified |
| Weight | ⚖️ 2.0 lb | ⚖️ 1.3 lb | ⚖️ 1.5 lb | ⚖️ 6.2 lb |
| I/O | 🔌 24 | 🔌 5 | 🔌 6 | 🔌 38 |
| Estimate | 💵 ~$1,699 | 💵 ~$999 | 💵 ~$1,749 | 💵 ~$2,799 |
| Deep dive | Current selection | Full comparison → | Full 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 UCX II affect rack fit and case depth?
It occupies 1U · half-rack. Its documented depth is 130 mm.
How much power does the RME Fireface UCX II draw?
Typical draw is 13W and documented maximum draw is 0W.
What connections does the RME Fireface UCX II have?
24 documented physical ports, including MIC / LINE 1, MIC / LINE 2, LINE / INSTRUMENT 3, LINE / INSTRUMENT 4, HEADPHONES / LINE 7–8, AES/EBU & S/PDIF · BREAKOUT.
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 Builder08 · Related gear, in the order you may need it.
Complete the system
Audio Interface
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1U · 13 ports · ~$3,799
Audio Interface
RME Fireface UFX III
1U · 39 ports · ~$3,199
Audio Interface
MOTU M4
Outside rack · 16 ports · ~$280
Audio Interface
MOTU 16A Audio Interface
1U · 11 ports · ~$2,495
Audio Interface
MOTU 24Ao Audio Interface
1U · 9 ports · ~$1,995
Audio Interface
MOTU 24Ai Audio Interface
1U · 9 ports · ~$1,995Planning guides for audio interface systems.
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