Audio Interface

MOTU 16A (Thunderbolt 4)

The Thunderbolt 4 generation of the MOTU 16A keeps the format playback rigs loved — sixteen balanced line ins and outs in 1U — and moves the computer link to TB4/USB4 with AVB networking still on board. Stems out to a monitor console, returns back in, and network audio when the rig grows. Successor to the AVB-era 16A at a lower price than the original ever sold for.

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Photos

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

MOTU 16A (Thunderbolt 4) — Photo: MOTU1 / 3

Documented outputs: 2020 destination connections
Documented inputs: 20Based on documented inputs
Rack space: 1UBuilder checks available rail space
Power draw: 18W120W 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 16A TB4 is a 1U, 16-in/16-out analog line interface built for the kind of playback and IEM rig that needs a lot of balanced I/O without burning a second rack space. Sixteen TRS inputs and sixteen TRS outputs cover stems-out to a monitor console, sends back in for talkback or audience feeds, and still leaves room to grow. The AVB port means it can hand audio across a network to another interface or a network-enabled console when the rig scales up, and the Thunderbolt 4 connection keeps the computer link fast and reliable for DAW-direct workflows.

Documented outputs: 2020 destination connections
Documented inputs: 20Based on documented inputs
Rack space: 1UBuilder checks available rail space

MOTU 16A (Thunderbolt 4) — rear panel — Photo: MOTU1U · 18W

Function

How it works in the path

At 1U and 178 mm deep, it sits comfortably in a shallow touring rack — that depth matters when you're sharing a 12U case with a Mac Mini, a power conditioner, and a patch bay. Eighteen watts nominal draw is modest enough that it won't stress a single-outlet power conditioner, and the 25-watt max gives you a realistic ceiling to budget against. The full-rack width means all sixteen TRS jacks are front-accessible, which is the right answer at load-in when you're patching quickly in low light. AVB runs over standard Cat6 to an EtherCon connector, so extending audio to FOH or a stage split doesn't require a separate digital snake.

Best fit

Where it earns its place in the rack

This interface belongs in a playback rig or IEM rack where you need genuine 16-channel analog depth from a single rack unit and want AVB networking available as the rig evolves. It's a strong fit for a touring playback engineer running stems to a monitor world console, or a band's self-contained IEM setup that may eventually tie into a larger AVB infrastructure. If you only need eight or fewer outputs and are cost-sensitive, there are smaller MOTU interfaces that cover that ground for less. If your workflow is entirely USB and you have no plans to use AVB, you're paying for capability you won't touch — but if there's any chance the rig grows, the headroom is worth it.

MOTU 16A (Thunderbolt 4) — additional view 2Photo: MOTU

In the rack

Details worth deciding before load-in.

Patch the 16A's outputs in console-send order at load-in, not stem order — if the monitor engineer loses a channel, they can trace it without your help.
Run Cat6 to the AVB port even if you're not using network audio yet; having a live EtherCon connection ready means adding a network split later is a five-minute job instead of a cable pull.
The 178 mm depth pairs well with a Mac Mini in the same rack — use a 1U shelf or a purpose-built Mac Mini tray directly above or below to keep the Thunderbolt 4 cable short and dressed.
Budget the full 25-watt max when calculating power-conditioner load, not the 18-watt nominal — at show time, both units will be running at capacity simultaneously.

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

20 documented inputs

¼-inch TRS + IEC C14

Arrives as: 20 documented inputs
Connector: ¼-inch TRS + IEC C14
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 311 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.

Panel view

Front panel

Rear panel

All documented ports for MOTU 16A (Thunderbolt 4)
Port	Panel	Connector	Direction	Signal	Channels
LINE IN 1	rear	¼-inch TRS	input	analog audio	—
LINE IN 2	rear	¼-inch TRS	input	analog audio	—
LINE IN 3	rear	¼-inch TRS	input	analog audio	—
LINE IN 4	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	—
LINE IN 7	rear	¼-inch TRS	input	analog audio	—
LINE IN 8	rear	¼-inch TRS	input	analog audio	—
LINE IN 9	rear	¼-inch TRS	input	analog audio	—
LINE IN 10	rear	¼-inch TRS	input	analog audio	—
LINE IN 11	rear	¼-inch TRS	input	analog audio	—
LINE IN 12	rear	¼-inch TRS	input	analog audio	—
LINE IN 13	rear	¼-inch TRS	input	analog audio	—
LINE IN 14	rear	¼-inch TRS	input	analog audio	—
LINE IN 15	rear	¼-inch TRS	input	analog audio	—
LINE IN 16	rear	¼-inch TRS	input	analog audio	—
LINE OUT 1	rear	¼-inch TRS	output	analog audio	—
LINE OUT 2	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 5	rear	¼-inch TRS	output	analog audio	—
LINE OUT 6	rear	¼-inch TRS	output	analog audio	—
LINE OUT 7	rear	¼-inch TRS	output	analog audio	—
LINE OUT 8	rear	¼-inch TRS	output	analog audio	—
LINE OUT 9	rear	¼-inch TRS	output	analog audio	—
LINE OUT 10	rear	¼-inch TRS	output	analog audio	—
LINE OUT 11	rear	¼-inch TRS	output	analog audio	—
LINE OUT 12	rear	¼-inch TRS	output	analog audio	—
LINE OUT 13	rear	¼-inch TRS	output	analog audio	—
LINE OUT 14	rear	¼-inch TRS	output	analog audio	—
LINE OUT 15	rear	¼-inch TRS	output	analog audio	—
LINE OUT 16	rear	¼-inch TRS	output	analog audio	—
DEVICE	rear	usb c	bidirectional	data	—
NETWORK 1	rear	RJ45	bidirectional	digital audio	32
IEC AC power inlet	rear	IEC C14	input	power	—
HOST	rear	usb c	bidirectional	data	—
NETWORK 2	rear	RJ45	bidirectional	digital audio	—
OPTICAL A IN	rear	toslink	input	digital audio	—
OPTICAL A OUT	rear	toslink	output	digital audio	—
OPTICAL B IN	rear	toslink	input	digital audio	—
OPTICAL B OUT	rear	toslink	output	digital audio	—
PHONES	front	¼-inch TRS	output	analog audio	—
WORD CLOCK IN	rear	bnc	input	digital audio	—
WORD CLOCK OUT/THRU	rear	bnc	output	digital audio	—

Showing 44 of 44 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 16A (Thunderbolt 4)This gear	MOTU 848	MOTU 8M Audio Interface	MOTU LP32 Audio Interface
Fit	📐 1U	📐 1U	📐 1U	📐 1U
Power	⚡ 18W	⚡ 18W	⚡ 30W	⚡ 25W
Weight	⚖️ 11.0 lb	⚖️ 4.0 lb	⚖️ 6.4 lb	⚖️ 5.5 lb
I/O	🔌 44	🔌 11	🔌 19	🔌 15
Estimate	💵 ~$1,595	💵 ~$1,595	💵 ~$1,695	💵 ~$1,495
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 MOTU 16A (Thunderbolt 4) affect rack fit and case depth?

It occupies 1U. Its documented depth is 311 mm.

How much power does the MOTU 16A (Thunderbolt 4) draw?

Typical draw is 18W and documented maximum draw is 120W.

What connections does the MOTU 16A (Thunderbolt 4) have?

44 documented physical ports, including LINE IN 1, LINE IN 2, LINE IN 3, LINE IN 4, LINE IN 5, LINE 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 Builder

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

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MOTU 16A Audio Interface

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1U · 9 ports · ~$1,995

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Photos

Product overview

Audio Interface decisions, organized around the whole rig.

How it works in the path

Where it earns its place in the rack

Signal path

20 documented inputs

Compatibility

Best fit · Audio Interface

Plan the companion path

Protocol boundary

I/O ports

Every connector, grouped by job.

Alternatives

Planning questions

Builder preview

Universal Audio Apollo x16 Gen 2

RME Fireface UFX III

MOTU M4 Audio Interface

MOTU 16A Audio Interface

MOTU 24Ao Audio Interface

MOTU 24Ai Audio Interface

Related articles

Picking an Audio Interface for a Live IEM Rig

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

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

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