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Audio Interface

MOTU 24Ai Audio Interface

The MOTU 24Ai mirrors the 24Ao but focuses on inputs, providing 24 channels of analog input on three DB25 connectors. This makes it ideal for recording scenarios, virtual soundcheck capture, or splitting analog signals into a networked audio system. Paired with a 24Ao, you get a full 24x24 analog I/O system in just 2U of rack space with AVB networking for flexible routing across your rig.

Compare
Discontinued. MOTU AVB-era interface gone from major retail 2026-07 — superseded by the 2024+ line (828/16A TB4/848). Kept for owners; used-market staple.

Photos

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

Photo: MOTU1 / 3
Documented outputs
1One destination connection
Documented inputs
5Based on documented inputs
Rack space
1UBuilder checks available rail space
Power draw
25W35W documented maximum
Catalog estimate
~$1,995Use 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 24Ai is a purpose-built analog input converter: 24 channels in, nothing wasted on outputs that a capture or splitting rig doesn't need. Three DB25 connectors bring all 24 analog inputs to the front of a 1U panel, and from there the signal moves into your network or DAW over AVB or USB-C. In a live context, this box earns its place as the analog front-end for a virtual soundcheck system, a multitrack recording interface, or the analog ingestion point for an AVB-routed monitor rig where all the real output work is handled downstream.

Documented outputs
1One destination connection
Documented inputs
5Based on documented inputs
Rack space
1UBuilder checks available rail space
MOTU 24Ai Audio Interface — additional view 1
Photo: MOTU1U · 25W
Function

How it works in the path

At load-in, those three DB25 tails are either your best friend or your first headache — have your Elco looms made up and labeled before the truck opens. Once cabled, the 24Ai draws a modest 25 watts typical and sits in 229mm of depth, so it fits a standard shallow tour rack without fighting for space. The dual AVB ports let you daisy-chain network nodes or connect to a switch without burning a separate interface slot, and word clock I/O means you can lock it cleanly to house digital infrastructure or serve as a clock source to the rest of your gear. USB-C connects it directly to a laptop for recording sessions or software control without a separate host machine in the chain.

Best fit

Where it earns its place in the rack

If your rig genuinely needs 24 channels of analog capture — virtual soundcheck on a 32-input stage, multitrack archive of a full band, or splitting analog consoles into a networked system — this is a clean, rack-dense way to do it. Pair it with the MOTU 24Ao and you have a full 24-in/24-out analog system in 2U, which is hard to beat for the footprint. If you need even a handful of analog outputs from the same box, the 24Ai isn't your answer; look at a device with mixed I/O instead. Similarly, if your input count is 8 or 16, you're paying for channels you'll leave dark.

MOTU 24Ai Audio Interface — rear panel
MOTU 24Ai Audio Interface — rear panelPhoto: MOTU
In the rack

Details worth deciding before load-in.

  • Pre-build and label your DB25 looms by group — inputs 1–8, 9–16, 17–24 — and sleeve them differently so stagehands can't cross-connect them in a dark wing.
  • Use the word clock output to discipline downstream converters rather than letting every box freewheel; the 24Ai makes a reliable clock source in a small analog-to-AVB rig.
  • If you're running virtual soundcheck, set a dedicated AVB stream for the 24Ai's inputs so they appear as a fixed source on the network — any engineer guest-mixing can pull up the same stream without re-routing.
  • Rack it directly above or below the 24Ao when running them as a pair; keeping the DB25 tails from both units short and parallel reduces cable management chaos and makes the 2U system feel like a single integrated converter.

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

db25 + bnc

Arrives as
5 documented inputs
Connector
db25 + 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 229 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: db25, RJ45, usb c, bnc. 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
24AiIDSEL96kInt
Rear panel
MOTU24Ai
All documented ports for MOTU 24Ai Audio Interface
PortPanelConnectorDirectionSignalChannels
Analog In 1-8 (DB25)reardb25 inputanalog audio—
Analog In 9-16 (DB25)reardb25 inputanalog audio—
Analog In 17-24 (DB25)reardb25 inputanalog audio—
AVB Network 1 (RJ45)rearRJ45 bidirectionaldigital audio—
AVB Network 2 (RJ45)rearRJ45 bidirectionaldigital audio—
USB-Crearusb c bidirectionaldata—
Word Clock In (BNC)rearbnc inputdigital audio—
Word Clock Out (BNC)rearbnc outputdigital audio—
Power (IEC)rearIEC C14 inputpower—

Showing 9 of 9 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 24Ai Audio Interface
MOTU 1248 Audio Interface
MOTU 848 audio interface
MOTU 8M Audio Interface
Fit📐 1U📐 1U📐 1U📐 1U
Power⚡ 25W⚡ 30W⚡ 18W⚡ 30W
Weight⚖️ 6.0 lb⚖️ 6.4 lb⚖️ 4.0 lb⚖️ 6.4 lb
I/O🔌 9🔌 18🔌 11🔌 19
Estimate💵 ~$1,995💵 ~$1,999💵 ~$1,595💵 ~$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 24Ai Audio Interface affect rack fit and case depth?

It occupies 1U. Its documented depth is 229 mm.

How much power does the MOTU 24Ai Audio Interface draw?

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

What connections does the MOTU 24Ai Audio Interface have?

9 documented physical ports, including Analog In 1-8 (DB25), Analog In 9-16 (DB25), Analog In 17-24 (DB25), AVB Network 1 (RJ45), AVB Network 2 (RJ45), USB-C.

Is the MOTU 24Ai Audio Interface discontinued?

MOTU AVB-era interface gone from major retail 2026-07 — superseded by the 2024+ line (828/16A TB4/848). Kept for owners; used-market staple.

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
24Ai 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.MOTU24AiCONNECTED GEARnext signal destination1U · 229 mm deep

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

Planning guides for audio interface systems.