01 · Source
20 documented inputs
XLR/TRS combo + ¼-inch TRS
- Arrives as
- 20 documented inputs
- Connector
- XLR/TRS combo + ¼-inch TRS
- Signal
- analog audio
Digital Mixer
Behringer XR18 Digital Mixer
The Behringer XR18 crams 18 input channels and six aux buses into a tabletop stagebox chassis with built-in WiFi for tablet control, making it one of the most space-efficient and affordable digital mixers available. The chassis is not a 19" panel — plan a rack-ear adapter kit or a shelf about three rack-spaces tall to secure it. It doubles as an 18-channel USB audio interface, which is useful for recording or virtual soundcheck from your playback computer. An excellent starting point for budget IEM rigs where you need mixing, routing, and USB multitrack in one compact box.
Photos
Manufacturer product photography — the drawn faceplate stays true to panel layout; these show the hardware itself.
- Documented outputs
- 1111 destination connections
- Documented inputs
- 20Based on documented inputs
- Rack space
- 3UBuilder checks available rail space
- Power draw
- 25W30W documented maximum
- Catalog estimate
- ~$509Use 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
Digital Mixer decisions, organized around the whole rig.
The Behringer XR18 crams 18 input channels and six auxAn auxiliary mix output — each aux is its own independent blend of the channels, typically one per monitor mix or effects send. busesA path where multiple channels sum into one signal — mixes, groups, and mains are all buses. A 25-bus console can build 25 blends at once. into a tabletop stageboxThe I/O endpoint on stage: mics plug in there and one digital line (AES50, Dante) carries everything to the console. The snake, digitized. chassis with built-in WiFi for tablet control, making it one of the most space-efficient and affordable digital mixers available. The chassis is not a 19" panel — plan a rack-ear adapter kit or a shelf about three rack-spaces tall to secure it. It doubles as an 18-channel USB audio interface, which is useful for recording or virtual soundcheckPlaying a recorded show back through the console as if the band were on stage — dial in mixes before anyone plugs in. from your playback computer. An excellent starting point for budget IEMIn-Ear Monitor — earpieces that replace floor wedges, feeding each player their own mix. The reason this whole rack exists. rigs where you need mixing, routing, and USB multitrack in one compact box.
- Documented outputs
- 1111 destination connections
- Documented inputs
- 20Based on documented inputs
- Rack space
- 3UBuilder 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 · Digital Mixer
Use it when 3U and 149 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.
Protocol boundary
This product declares ULTRANET; matching plugs alone do not make other protocols compatible.
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 |
|---|---|---|---|---|---|
| IN 1 | rear | XLR/TRS combo | input | analog audio | — |
| IN 2 | rear | XLR/TRS combo | input | analog audio | — |
| IN 3 | rear | XLR/TRS combo | input | analog audio | — |
| IN 4 | rear | XLR/TRS combo | input | analog audio | — |
| IN 5 | rear | XLR/TRS combo | input | analog audio | — |
| IN 6 | rear | XLR/TRS combo | input | analog audio | — |
| IN 7 | rear | XLR/TRS combo | input | analog audio | — |
| IN 8 | rear | XLR/TRS combo | input | analog audio | — |
| IN 9 | rear | XLR/TRS combo | input | analog audio | — |
| IN 10 | rear | XLR/TRS combo | input | analog audio | — |
| IN 11 | rear | XLR/TRS combo | input | analog audio | — |
| IN 12 | rear | XLR/TRS combo | input | analog audio | — |
| IN 13 | rear | XLR/TRS combo | input | analog audio | — |
| IN 14 | rear | XLR/TRS combo | input | analog audio | — |
| IN 15 | rear | XLR/TRS combo | input | analog audio | — |
| IN 16 | rear | XLR/TRS combo | input | analog audio | — |
| LINE 17 | rear | ¼-inch TRS | input | analog audio | — |
| LINE 18 | rear | ¼-inch TRS | input | analog audio | — |
| AUX 1 | rear | XLR male | output | analog audio | — |
| AUX 2 | rear | XLR male | output | analog audio | — |
| AUX 3 | rear | XLR male | output | analog audio | — |
| AUX 4 | rear | XLR male | output | analog audio | — |
| AUX 5 | rear | XLR male | output | analog audio | — |
| AUX 6 | rear | XLR male | output | analog audio | — |
| MAIN L | rear | XLR male | output | analog audio | — |
| MAIN R | rear | XLR male | output | analog audio | — |
| PHONES | rear | ¼-inch TRS | output | analog audio | — |
| ULTRANET | rear | RJ45 | output | digital audio | 16 |
| MIDI IN | rear | midi din5 | input | data | — |
| MIDI OUT | rear | midi din5 | output | data | — |
| USB | rear | usb b | bidirectional | data | — |
| ETHERNET | rear | RJ45 | bidirectional | data | — |
| AC POWER | rear | IEC C14 | input | power | — |
Showing 33 of 33 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 | 📐 3U | 📐 4U | 📐 3U | 📐 3U |
| Power | ⚡ 25W | ⚡ 130W | ⚡ 60W | ⚡ 40W |
| Weight | ⚖️ 7.1 lb | ⚖️ 20.9 lb | ⚖️ 14.3 lb | ⚖️ 6.6 lb |
| I/O | 🔌 33 | 🔌 52 | 🔌 53 | 🔌 28 |
| Estimate | 💵 ~$509 | 💵 ~$1,799 | 💵 ~$989 | 💵 ~$429 |
| 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 Behringer XR18 Digital Mixer affect rack fit and case depth?
It occupies 3U. Its documented depth is 149 mm.
How much power does the Behringer XR18 Digital Mixer draw?
Typical draw is 25W and documented maximum draw is 30W.
What connections does the Behringer XR18 Digital Mixer have?
33 documented physical ports, including IN 1, IN 2, IN 3, IN 4, IN 5, IN 6.
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
Digital Mixer
Behringer X32 Rack Digital Mixer
3U · 53 ports · ~$989
Digital Mixer
Behringer X32 Digital Mixer
Outside rack · 57 ports · ~$2,799
Digital Mixer
Midas M32R Live Digital Console
5U · 30 ports · ~$2,999
Digital Mixer
Midas M32 Live Digital Console
Outside rack · 58 ports · ~$4,499Digital Mixer
Behringer Wing Rack Digital Console
4U · 52 ports · ~$1,799
Digital Mixer
Midas MR18 Digital Mixer
3U · 33 ports · ~$799Planning guides for digital mixer systems.
Related articles
Fundamentals · 6 min
From Stage to Ear: How Audio Flows Through an IEM Rack
A walking tour of the signal path from microphone to in-ear monitor, with what every box in the rack actually does to the audio along the way.
Fundamentals · 8 min
Ambient Mics for In-Ear Monitors: Killing the “Locked in a Box” Feeling
Why sealed IEMs make you feel disconnected from the room — and exactly how to put the audience back into your mix with one or two well-placed mics.
Workflow · 10 min
Setting Up Stereo IEM Mixes on an X32 / M32
Step-by-step: linking aux buses into stereo pairs, pre-fader vs post-fader, routing buses to Ultranet vs physical XLRs vs AES50, and adding a bus-level limiter.
Networking · 9 min
Dante vs MADI vs AES50: Which Audio Network Should You Use?
A practical comparison of the three audio-over-network protocols you’ll encounter in a rack rig, with guidance on when each one is the right pick.