Universal Audio · Mid-size · USB · 2020 on
UA launched the Apollo Solo pair in August 2020. The Thunderbolt Solo replaced the Arrow, and the Solo USB brought the same box to Windows PCs without Thunderbolt. It's the smallest Apollo, with two Unison mic preamps, a front instrument input that also runs Unison amp models, one pair of monitor outputs and a headphone jack. Inside is a single SHARC DSP, so you can track through a couple of UAD preamp or amp models with near-zero latency, then mix with native plug-ins. USB 3 can't power it the way Thunderbolt 3 powers the other Solo, so it needs its own 12 V supply. It's Windows only, which is the first thing to rule on. If your PC has no Thunderbolt and you want the Apollo way of tracking for one or two sources, this is the one to hunt, ideally with its power supply.
In the photos
It has the same size and top-panel layout as the Thunderbolt Apollo Solo, so turn to the rear photo. The USB version has a USB-C port plus a round DC power socket, while the Thunderbolt Solo is bus powered and has no power socket at all. The older black Arrow is the Thunderbolt Solo's predecessor.
Mac and Windows
UA lists the USB Apollos as Windows only, needing 64-bit Windows 10 or Windows 11 on a PC with a built-in USB 3 or USB 4 port. There's no macOS driver and no support for Windows on ARM. Current UAD software still supports it (it needs v9.12.2 or later), and UA recommends an Intel USB host controller, warning that 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-issue notes for its USB Apollos cover the unit not being recognised when it powers up at the same moment as the PC (switch it on again after Windows starts) and DAWs freezing at 2048-sample buffers. The power plug locks with a twist, and UA says a plug that isn't locked can cause intermittent power loss.
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 open-box Heritage Edition at $585 delivered from a 100% seller, since its photo shows it boxed with the power supply. There are at least 20 for sale and most ask $500–700 delivered, but dealers selling new Heritage Editions at $699 with free shipping set the top of that band, while used units ask about $306–658. It's Windows only, needing 64-bit Windows 10 or 11 and a USB 3 port, with no Mac driver at all, and it can't run on bus power, so pick one with UA's 12 V, 1.6 A locking supply or budget for the matching one. Ask for the rear photo, where a USB-C port next to a round power socket means Solo USB, since the Thunderbolt Solo has no power socket. Heritage plug-ins on a used or open-box unit move only if the seller does UA's transfer, UA's warranty covers the original owner only, and the new Japan listing with $450 shipping asks about twice the median.
$306.13est. delivered
The lowest price here, an auction at $306 delivered with no bids yet, so it will climb. The title names no power supply and the photo shows only the front, so ask for the rear panel and the supply.
Universal Audio Apollo Solo USB Audio Interface
$585.00est. delivered
An open-box Heritage Edition at $585 delivered, $114 under the dealers' new price, from a 100% seller, and the photo shows it boxed with the power supply. Heritage plug-ins aren't guaranteed on an open-box unit, so get what transfers confirmed in writing.
Universal Audio Apollo Solo USB Heritage Edition USB-C Interface (Open Box)
$657.96est. delivered
Titled tested and sold with the box and the power supply, so nothing's missing before first use. It ships from Japan, so ask for a photo of the supply's label, since Japan units can come with a 100 V one.
Universal Audio Apollo Solo USB Audio Interface with Box & Power Supply Tested
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$306.13est. delivered
$299.99 + $6.14 shipping
Auction · no bids yet · ends in 5d 12h
Good buy
Auction with no bids, so the price will climb. No supply named, and the photo shows only the front.
Seller: travyberry
100% positive
Open box$585.00est. delivered
$545.00 + $40.00 shipping
Buy It Now$545.00
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
Open-box Heritage Edition, boxed with the supply in the photo.
Seller: superdupergearhtx
100% positive
Used$657.96est. delivered
$567.98 + $89.98 shipping
Buy It Now$567.98
Good buy
Titled tested, with box and power supply. Ships from Japan.
Seller: sage_records
99.4% positive
Used$391.69est. delivered
$367.89 + $23.80 shipping
Buy It Now$367.89
Our take
Lowest fixed price here. No supply named; ask for it and a rear photo.
Seller: lend88
100% positive
Open box$561.65est. delivered
$548.95 + $12.70 shipping
Buy It Now$548.95
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 Heritage Edition. The box reads USB 3 for Windows; no supply shown.
Seller: with-love-from-iowa
99.5% positive
New$699.00delivered
$699.00 · free shipping
Buy It Now$699.00
Our take
New Heritage Edition from Perfect Circuit, the dealers' $699 price.
Seller: perfect_circuit_audio
99.8% positive
Used$514.70est. delivered
$499.00 + $15.70 shipping
Buy It Now$499.00
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 on eBay's catalog title, which two other sellers also use. Pay only through eBay checkout.
Seller: juliendo-0
No feedback yet
New$1,329.06est. delivered
$879.06 + $450.00 shipping
Buy It Now$879.06
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.
Priced high
New, from Japan with $450 shipping. About 2 times the median.
Seller: makomaki
99.9% positive
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