01 · Source
19 documented inputs
¼-inch TS + xlr4 male
- Arrives as
- 19 documented inputs
- Connector
- ¼-inch TS + xlr4 male
- Signal
- analog audio
Audio Interface
Universal Audio Apollo x8 Gen 2
Universal Audio Apollo x8 Gen 2 Thunderbolt Audio Interface with UAD Analog Classics. Plan its source-defined physical connections and placement in your rig.
- Documented outputs
- 1616 destination connections
- Documented inputs
- 19Based on documented inputs
- Rack space
- 1UBuilder checks available rail space
- Power draw
- 30W72W documented maximum
- Catalog estimate
- ~$2,899Use 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.
Universal Audio Apollo x8 Gen 2 Thunderbolt Audio Interface with UAD Analog Classics. Plan its source-defined physical connections and placement in your rig.
- Documented outputs
- 1616 destination connections
- Documented inputs
- 19Based on documented inputs
- Rack space
- 1UBuilder 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 · Audio Interface
Use it when 1U and 343.1 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: ¼-inch TS, ¼-inch TRS, xlr4 male, 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.
| Port | Panel | Connector | Direction | Signal | Channels |
|---|---|---|---|---|---|
| HI-Z INPUT 1 | front | ¼-inch TS | input | analog audio | — |
| HI-Z INPUT 2 | front | ¼-inch TS | input | analog audio | — |
| STEREO HEADPHONES 1 | front | ¼-inch TRS | output | analog audio | — |
| STEREO HEADPHONES 2 | front | ¼-inch TRS | output | analog audio | — |
| POWER IN · 12V DC 9A · LOCKING XLR4 | rear | xlr4 male | input | power | — |
| THUNDERBOLT 3 · PORT 1 | rear | usb c | bidirectional | data | — |
| THUNDERBOLT 3 · PORT 2 | rear | usb c | bidirectional | data | — |
| ADAT OUT 2 · S/MUX | rear | toslink | output | digital audio | — |
| ADAT OUT 1 · S/MUX | rear | toslink | output | digital audio | — |
| ADAT IN 2 · S/MUX | rear | toslink | input | digital audio | — |
| ADAT IN 1 · S/MUX | rear | toslink | input | digital audio | — |
| WORDCLOCK OUT | rear | bnc | output | data | — |
| WORDCLOCK IN | rear | bnc | input | data | — |
| SPDIF IN | rear | rca | input | digital audio | — |
| SPDIF OUT | rear | rca | output | digital audio | — |
| LINE OUT 7 · ALT / SURROUND | rear | ¼-inch TRS | output | analog audio | — |
| LINE OUT 8 · ALT / SURROUND | rear | ¼-inch TRS | output | analog audio | — |
| LINE OUT 5 · ALT / SURROUND | rear | ¼-inch TRS | output | analog audio | — |
| LINE OUT 6 · ALT / SURROUND | rear | ¼-inch TRS | output | analog audio | — |
| LINE OUT 3 · ALT / SURROUND | rear | ¼-inch TRS | output | analog audio | — |
| LINE OUT 4 · ALT / SURROUND | rear | ¼-inch TRS | output | analog audio | — |
| LINE OUT 1 · ALT / SURROUND | rear | ¼-inch TRS | output | analog audio | — |
| LINE OUT 2 · ALT / SURROUND | rear | ¼-inch TRS | output | analog audio | — |
| LINE IN 7 | rear | ¼-inch TRS | input | analog audio | — |
| LINE IN 8 | 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 3 | rear | ¼-inch TRS | input | analog audio | — |
| LINE IN 4 | rear | ¼-inch TRS | input | analog audio | — |
| LINE IN 1 | rear | ¼-inch TRS | input | analog audio | — |
| LINE IN 2 | rear | ¼-inch TRS | input | analog audio | — |
| MONITOR L | rear | ¼-inch TRS | output | analog audio | — |
| MONITOR R | rear | ¼-inch TRS | output | analog audio | — |
| MIC INPUT 4 | rear | XLR female | input | analog audio | — |
| MIC INPUT 3 | rear | XLR female | input | analog audio | — |
| MIC INPUT 2 | rear | XLR female | input | analog audio | — |
| MIC INPUT 1 | rear | XLR female | input | analog audio | — |
Showing 37 of 37 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 | 📐 1U | 📐 1U | 📐 1U · half-rack | 📐 1U |
| Power | ⚡ 30W | ⚡ 30W | ⚡ 5W | ⚡ Unverified |
| Weight | ⚖️ 8.7 lb | ⚖️ 9.0 lb | ⚖️ 1.5 lb | ⚖️ 9.0 lb |
| I/O | 🔌 37 | 🔌 7 | 🔌 9 | 🔌 28 |
| Estimate | 💵 ~$2,899 | 💵 ~$2,999 | 💵 ~$399 | 💵 ~$999 |
| 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 Universal Audio Apollo x8 Gen 2 affect rack fit and case depth?
It occupies 1U. Its documented depth is 343.1 mm.
How much power does the Universal Audio Apollo x8 Gen 2 draw?
Typical draw is 30W and documented maximum draw is 72W.
What connections does the Universal Audio Apollo x8 Gen 2 have?
37 documented physical ports, including HI-Z INPUT 1, HI-Z INPUT 2, STEREO HEADPHONES 1, STEREO HEADPHONES 2, POWER IN · 12V DC 9A · LOCKING XLR4, THUNDERBOLT 3 · PORT 1.
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.
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