Skip to main content

Audio Interface

MOTU 848

The MOTU 848 is the flagship of the current line: 28-in/32-out over Thunderbolt 4/USB4 with four mic preamps, eight line ins and outs, dual ADAT banks, and AVB networking. It is the 828 concept with more of everything, aimed at rigs that need mic inputs, stem outputs, and network audio from one rack space. Pairs naturally with the TB4-generation 16A for channel expansion.

Compare

Photos

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

Photo: MOTU1 / 3
Documented outputs
44 destination connections
Documented inputs
5Based on documented inputs
Rack space
1UBuilder checks available rail space
Power draw
18W25W documented maximum
Catalog estimate
~$1,595Use 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 MOTU 848 is a single-rack-unit interface that tries to be the only audio device your playback or IEM rig ever needs to argue with. It carries four combo mic preamps, eight additional TRS line inputs, eight balanced TRS outputs plus a dedicated stereo main out, two full ADAT banks, and a 32-channel AVB Ethernet port — all behind a Thunderbolt 4 connection to your host machine. That is a lot of I/O surface area for one rackspace, and the point is consolidation: one box to receive stems from a DAW, route them to IEM transmitters, and still have mic inputs for talkback or backing-vocal spot mics without a separate preamp sitting in the rack.

Documented outputs
44 destination connections
Documented inputs
5Based on documented inputs
Rack space
1UBuilder checks available rail space
MOTU 848 audio interface — rear panel
Photo: MOTU1U · 18W
Function

How it works in the path

At 18 watts nominal and a shallow 178 mm depth, the 848 won't stress a small rack or a two-outlet power strip. The Thunderbolt 4 connection keeps latency low enough for real-time monitoring on a live rig, though you'll still want buffer settings dialed in during soundcheck, not at showtime. The dual ADAT banks are the real workhorse for expansion — two optical runs at 44.1/48 kHz give you up to 16 additional channels in and out to something like an expander or a stage box. The AVB port is genuinely useful if you're in a venue or with a console ecosystem that speaks AVB natively, but don't plan around it if your system is entirely point-to-point analog and ADAT.

Best fit

Where it earns its place in the rack

This box belongs in a Mac-centric playback or IEM rig where the operator needs mic preamps, multi-stem outputs, and future expansion headroom without stacking units. If you're running a straight two-track playback rig with no mics and no expansion, the 848 is more interface than you need and you'll leave most of it dark. Engineers working on PC rigs should verify Thunderbolt 4 compatibility carefully — USB4 mode exists, but test your specific machine before committing. And if your channel count has already outgrown 28 inputs, MOTU's own 16A pairs cleanly via ADAT or AVB for expansion rather than replacing this unit.

MOTU 848 audio interface — additional view 2
MOTU 848 audio interface — additional view 2Photo: MOTU
In the rack

Details worth deciding before load-in.

  • Label your ADAT runs at both ends with the bank letter (A or B) and sample rate before the cables go in the rack — at load-in, a mispatched optical cable between banks is silent and invisible.
  • Use the eight TRS line outputs for your IEM mix sends and reserve the Main Out L/R as a dedicated confidence feed or FOH reference, so you never accidentally reroute a transmitter feed during a software patch.
  • If you're clock-slaving outboard gear via ADAT, designate the 848 as clock master and set everything downstream to external — chasing a flapping clock mid-set on optical is a headache you can eliminate at line check.
  • At 178 mm depth it fits most shallow touring rack drawers, but account for the Thunderbolt cable bend radius behind the unit — a right-angle TB4 cable saves real estate and prevents strain on the port if the rack lid closes tight.

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

5 documented inputs

XLR/TRS combo + ¼-inch TRS

Arrives as
5 documented inputs
Connector
XLR/TRS combo + ¼-inch TRS
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 178 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 AVB; 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.

Front panel
848
Rear panel
MOTU848
All documented ports for MOTU 848
PortPanelConnectorDirectionSignalChannels
Mic/Line 1-4rearXLR/TRS combo inputanalog audio4
Line In 5-12rear¼-inch TRS inputanalog audio8
Line Out 1-8rear¼-inch TRS outputanalog audio8
Main Out L/Rrear¼-inch TRS outputanalog audio2
ADAT In Areartoslink inputdigital audio—
ADAT Out Areartoslink outputdigital audio—
ADAT In Breartoslink inputdigital audio—
ADAT Out Breartoslink outputdigital audio—
Thunderbolt 4rearthunderbolt bidirectionaldata—
AVB NetworkrearetherCON bidirectionaldigital audio32
PowerrearIEC C14 inputpower—

Showing 11 of 11 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
MOTU 848 audio interface
MOTU 16A (Thunderbolt 4)
MOTU 24Ai Audio Interface
MOTU 8M Audio Interface
Fit📐 1U📐 1U📐 1U📐 1U
Power⚡ 18W⚡ 18W⚡ 25W⚡ 30W
Weight⚖️ 4.0 lb⚖️ 11.0 lb⚖️ 6.0 lb⚖️ 6.4 lb
I/O🔌 11🔌 44🔌 9🔌 19
Estimate💵 ~$1,595💵 ~$1,595💵 ~$1,995💵 ~$1,695
Deep diveCurrent selectionFull 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 MOTU 848 affect rack fit and case depth?

It occupies 1U. Its documented depth is 178 mm.

How much power does the MOTU 848 draw?

Typical draw is 18W and documented maximum draw is 25W.

What connections does the MOTU 848 have?

11 documented physical ports, including Mic/Line 1-4, Line In 5-12, Line Out 1-8, Main Out L/R, ADAT In A, ADAT Out A.

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
848 positioned in a rack planA simplified plan shows the unit taking 1 rack units, with its documented connection path continuing to a planned destination.MOTU848CONNECTED GEARnext signal destination1U · 178 mm deep

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

Universal Audio Apollo x16 Gen 2

Audio Interface

Universal Audio Apollo x16 Gen 2

1U · 11 ports · ~$3,799
RME Fireface UFX III

Audio Interface

RME Fireface UFX III

1U · 10 ports · ~$3,199
MOTU M4 Audio Interface

Audio Interface

MOTU M4 Audio Interface

Outside rack · 7 ports · ~$280
MOTU 16A Audio Interface

Audio Interface

MOTU 16A Audio Interface

1U · 11 ports · ~$2,495
MOTU 24Ao Audio Interface

Audio Interface

MOTU 24Ao Audio Interface

1U · 9 ports · ~$1,995
MOTU 24Ai Audio Interface

Audio Interface

MOTU 24Ai Audio Interface

1U · 9 ports · ~$1,995

Planning guides for audio interface systems.

Related articles

Workflow · 7 min

Picking an Audio Interface for a Live IEM Rig

How to choose between a digital mixer, a Thunderbolt interface, and a Dante converter as the brain of your IEM rack — with concrete picks at each tier.

Workflow · 14 min

Building a Click + Tracks Playback Rig: From Laptop to Multi-Output Interface

How to build a live-performance playback rig that runs click + backing tracks reliably — interface sizing, routing rules, software comparison, and what to do when the laptop crashes.

Workflow · 12 min

Redundant Playback: Two Laptops, an Auto-Switching Interface, and Why You Need One

How to build a fail-safe live playback rig with primary + backup laptops, an auto-switching audio interface, and a failover workflow you can actually trust on a Sunday morning.

Workflow · 11 min

SMPTE Timecode for Worship and Touring: Locking Tracks, Lights, and Video

LTC vs MTC vs MIDI Clock, how to generate timecode from Ableton or Playback, how lighting and video receive it, and the frame-rate mistake that drifts every show.