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Audio Interface

MOTU 828es Audio Interface

The MOTU 828es is a versatile rack-mount interface that doubles as a word clock source and distribution point, making it useful in rigs where you need both audio I/O and clock management. Its onboard DSP mixer handles routing and monitoring independently of the host computer, and the wide range of connectivity including ADAT, S/PDIF, and word clock makes it a flexible hub. A solid all-in-one option for medium-complexity playback rigs.

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Discontinued. 828es discontinued — replaced by the 2024 MOTU 828 (USB3). Kept for owners.

Photos

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

Photo: MOTU1 / 2
Documented outputs
33 destination connections
Documented inputs
4Based on documented inputs
Rack space
1UBuilder checks available rail space
Power draw
25W35W documented maximum
Catalog estimate
~$1,099Use 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 828es is a 1U rackmount audio interface built for medium-complexity playback and IEM rigs where you need a reliable audio hub and a clean clock source in the same box. Its 28-in/32-out architecture over USB-C, combined with ADAT, S/PDIF, and word clock I/O, means it can anchor a rig that pulls from multiple digital sources without requiring a separate clock distribution unit. The onboard DSP mixer is the real differentiator here — it handles routing and monitoring entirely independent of the host computer, so if your playback machine hiccups, your monitor feeds don't go dark.

Documented outputs
33 destination connections
Documented inputs
4Based on documented inputs
Rack space
1UBuilder checks available rail space
MOTU 828es Audio Interface — additional view
Photo: MOTU1U · 25W
Function

How it works in the path

At 25 watts nominal and 35 at peak, the 828es is easy on your conditioner's budget. The 230mm depth is reasonable for most shallow touring racks. The two front XLR mic inputs are handy for a click reference or ambient mic without breaking out a separate preamp. Word clock in and out over BNC means you can subordinate this unit to a master clock or drive downstream gear — a genuine flexibility that removes a dedicated clock box from smaller rigs. The TRS main outputs feed your console or distribution amp cleanly at line level; just budget XLR adapters if your downstream gear expects balanced XLR.

Best fit

Where it earns its place in the rack

This unit earns its place in a one- or two-rack playback rig where the operator wants consolidated I/O, onboard mixing, and clock management without carrying three separate boxes. If your show is running Dante or AVB at scale, the 828es won't fit that architecture — look at dedicated network audio interfaces instead. Similarly, if you need more than two mic preamps on the front end, you'll be adding a separate stage box anyway, at which point a more I/O-dense interface might justify the trade. For a tight festival or theater IEM rig where simplicity and reliability matter more than channel count, this is a well-balanced choice.

In the rack

Details worth deciding before load-in.

  • Set the 828es as your word clock master when it's the only digital hub in the rack — slave any ADAT expanders or digital splits to it via BNC rather than leaving them on internal clock, which eliminates async sample-rate drift mid-show.
  • Use the onboard DSP mixer to pre-build your monitor mix routing before doors; if the playback laptop loses its USB handshake momentarily, the DSP holds the routing state and audio passes through without a dropout.
  • The TRS main outputs are unbalanced-friendly but run at full line level — if you're hitting a console input that expects +4 dBu balanced XLR, use a quality TRS-to-XLR adapter and confirm pin-2 hot at the console end to avoid polarity surprises.
  • At 230mm deep, verify your rack drawer or shelf depth before the gig; shallow utility racks common in IEM setups can run as short as 200mm, which will put the rear panel under stress from the USB-C and BNC cables.

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

4 documented inputs

XLR female + bnc

Arrives as
4 documented inputs
Connector
XLR female + 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 230 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, ¼-inch TRS, 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
828esIDSEL96kInt
Rear panel
MOTU828es
All documented ports for MOTU 828es Audio Interface
PortPanelConnectorDirectionSignalChannels
Mic In 1 (XLR)rearXLR female inputanalog audio—
Mic In 2 (XLR)rearXLR female inputanalog audio—
Main Out L (TRS)rear¼-inch TRS outputanalog audio—
Main Out R (TRS)rear¼-inch TRS outputanalog audio—
Word Clock Out (BNC)rearbnc outputdigital audio—
Word Clock In (BNC)rearbnc inputdigital audio—
USB-Crearusb c bidirectionaldata—
Power (IEC)rearIEC C14 inputpower—

Showing 8 of 8 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
MOTU 828es Audio Interface
MOTU 828 (2024) audio interface
MOTU 8A Audio Interface
MOTU 8D Audio Interface
Fit📐 1U📐 1U📐 1U · half-rack📐 1U
Power⚡ 25W⚡ 15W⚡ 25W⚡ 25W
Weight⚖️ 5.5 lb⚖️ 11.0 lb⚖️ 5.5 lb⚖️ 5.5 lb
I/O🔌 8🔌 39🔌 23🔌 15
Estimate💵 ~$1,099💵 ~$1,095💵 ~$1,495💵 ~$1,295
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 828es Audio Interface affect rack fit and case depth?

It occupies 1U. Its documented depth is 230 mm.

How much power does the MOTU 828es Audio Interface draw?

Typical draw is 25W and documented maximum draw is 35W.

What connections does the MOTU 828es Audio Interface have?

8 documented physical ports, including Mic In 1 (XLR), Mic In 2 (XLR), Main Out L (TRS), Main Out R (TRS), Word Clock Out (BNC), Word Clock In (BNC).

Is the MOTU 828es Audio Interface discontinued?

828es discontinued — replaced by the 2024 MOTU 828 (USB3). Kept for owners.

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
828es Audio Interface positioned in a rack planA simplified plan shows the unit taking 1 rack units, with its documented connection path continuing to a planned destination.MOTU828esCONNECTED GEARnext signal destination1U · 230 mm deep

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

Planning guides for audio interface systems.