Universal Audio · Prosumer · USB · 2015–c.2023
Universal Audio announced the Apollo Twin USB in September 2015 and shipped it that October. It was the first Apollo for Windows PCs without Thunderbolt, running over USB 3 with UAD-2 Duo processing built in. You get the original Twin's layout, with two Unison mic preamps, a front Hi-Z input, monitor and line outputs and an optical input for eight more channels from an ADAT preamp. It never had a Mac driver, and UA only sold it as a Duo. The Twin X USB followed in 2023 with newer converters, but the Twin USB is still supported by current UAD software on Windows 10 and 11. Want two good preamps and Unison on a PC with no Thunderbolt port? It's the older, simpler way in. Hunt one with its power supply.
In the photos
Look at the rear photo first. The Twin USB has a squarish USB 3 Type-B socket where the Thunderbolt Twins have a Thunderbolt port, and UA only sold it as a Duo. It has no talkback mic, so there's no small dimple on top and no second row of monitor symbols above the buttons, which the Twin MkII added.
Mac and Windows
UA lists it as Windows only, needing 64-bit Windows 10 or Windows 11 with a USB 3 or USB 4 port, and it isn't compatible with macOS or Windows on ARM. It launched for Windows 7 and 8.1, which current UAD software no longer supports, and it needs UAD v8.5.2 or later. UA recommends an Intel USB host controller and warns some earlier AMD AM4 USB controllers have limited compatibility.
Power, cables and licences
Check the listing photos against this list, and ask the seller about anything you can’t see. A missing power supply or a licence that won’t transfer should come off the price.
UA's known issues for the Twin USB are the unit not being recognised when it and the PC start at the same moment (power it on again after Windows boots) and DAWs going unresponsive at buffers of 2048 or more. The locking power plug must be twisted home or the unit can lose power.
Buying your first one? How to pick a first used interface covers inputs, mic gain and drivers, and the power supply guide covers which ones need their adapter.
Buying guide
We'd buy the Heritage Edition shown in its box at $550 delivered from a 99.6% seller, at the bottom of the band. There are at least 16 for sale and most ask $550–825 delivered, but many come from zero-feedback accounts, so skip those and pay only through eBay checkout. It's Windows only, needing 64-bit Windows 10 or 11 and a USB 3 port, with no Mac driver at all, and the rear photo should show a squarish USB 3 Type-B socket where Thunderbolt Twins have a Thunderbolt port. It needs UA's 12 V, 1.5 A locking supply, and none of these titles name it, so pick one with it in the photos or budget for the matching one. Heritage Edition plug-ins and the seller's UAD library move only through UA's transfer form, and UA's warranty covers the original owner only.
$525.00delivered
The lowest delivered Twin USB here from a seller with feedback, $525 with free shipping, titled Gen 1 Duo in great condition. The photo shows a USB cable but no power supply, so ask for it or budget for the matching one.
Universal Audio Apollo Twin USB DUO Gen 1 Audio Interface - Great Condition!
$550.35est. delivered
A Heritage Edition at $550 delivered from a 99.6% seller, at the bottom of the band, and the photo shows the unit in its box. No supply is named, and the Heritage plug-ins stay with the seller's account unless they do UA's transfer.
Universal Audio Apollo Twin USB DUO Heritage Edition Audio Interface
Delivered prices include shipping as eBay quoted it to a US address on Oct 14, 2026. Many sellers charge by distance, so your total may differ. eBay shows yours before you pay.
Snapshot
Checked . Some may have sold.
Delivered prices include shipping as eBay quoted it to a US address on Oct 14, 2026. Many sellers charge by distance, so your total may differ. eBay shows yours before you pay.
Used$525.00delivered
$525.00 · free shipping
Buy It Now$525.00
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Good buy
Titled great condition. The photo shows a USB cable, no power supply.
Seller: jcorrao4
100% positive
Used$550.35est. delivered
$540.00 + $10.35 shipping
Buy It Now$540.00
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Good buy
Heritage Edition, boxed in the photo. No supply named.
Seller: nottodayluciifer
99.6% positive
Used$557.00est. delivered
$550.00 + $7.00 shipping
Buy It Now$550.00
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Our take
eBay's catalog title from a 100% seller. No supply named; ask.
Seller: cej-octav
100% positive
Open box$789.98est. delivered
$769.99 + $19.99 shipping
Buy It Now$769.99
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Our take
Open-box card, boxed Heritage Edition in the photo. No supply named.
Seller: crabwarehouse
99% positive
Used$835.92delivered
$835.92 · free shipping
Buy It Now$835.92
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Our take
Titled Confirmed Operation (tested) by a Japan seller, free shipping. Ask for a photo of the supply's label.
Seller: geebase
99.3% positive
Used$510.34est. delivered
$499.99 + $10.35 shipping
Buy It Now$499.99
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Check the seller
Zero-feedback seller, and another account uses the same title. Pay only through eBay checkout.
Seller: richarddlt_55
No feedback yet
Used$725.59est. delivered
$702.73 + $22.86 shipping
Buy It Now$702.73
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Check the seller
Zero-feedback seller. The photo shows the box and a power supply.
Seller: slickrick23905
No feedback yet
Open box$977.30est. delivered
$955.00 + $22.30 shipping
Buy It Now$955.00
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Check the seller
Zero-feedback seller with the top ask here, about 1.3 times the median.
Seller: giltower
No feedback yet
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