Universal Audio Apollo Solo USB Audio Interface (for Windows)

Put album-quality recording on your desktop with the Universal Audio Apollo Solo USB, a 2 x 4 interface that includes UA's Realtime Analog Classics plug-ins.
Shape your recordings into records with genuine UA conversion and classic mixing tools. Featuring class-leading Universal Audio conversion, two Unison mic preamps, and a suite of built-in effects, Apollo Solo USB puts album-quality recording on your desktop. This 2 x 4 USB audio interface for Windows also includes a generous collection of UAD plug-ins to record vocals and instruments through, at near-zero latency.

Get a closer look at the Apollo Solo in this one-minute overview from UA:

Unison Technology for Stunning Mic and Guitar Preamp Emulations

Apollo Solo USB's Unison technology gives you the tone, touch and "feel" of the world's most sought-after tube and transformer-based mic preamps and guitar amps. It includes the UA 610-B Tube Preamp, Marshall Plexi Classic Amplifier, and Ampeg SVT-VR Classic Bass Amp plug-ins -- and can be expanded with exclusive titles from Neve, Avalon, SSL, Fender, and more. The secret is a unique hardware-software integration, which adjusts the impedance of Apollo's instrument and mic preamps to match the emulated hardware -- for authentic analog sound unmatched by other recording interfaces.

Realtime UAD Plug-In Processing for Recording with Near-Zero Latency

Derived from Universal Audio's award-winning Apollo interfaces, Apollo Solo USB opens up a range of classic analog color via its Realtime UAD Processing. Featuring an onboard UAD-2 SOLO Core processor, Apollo Solo USB lets you monitor and record through the full read more library of UAD Powered Plug-Ins -- at near-zero latency, regardless of your audio software buffer setting. It's like having a virtual analog studio that fits in a laptop bag.

The UAD library features more than 100 titles and offers everything from classic Moog filters to Ampex tape to Lexicon reverbs -- with more being added every few months. These are the exact same UAD plug-ins used on hit records by Billie Eilish, Kendrick Lamar, Dr. Dre, Foo Fighters, and many more.

Built for Musicians, Electronic Producers, and Songwriters

Apollo Solo USB's robust all-metal construction, best-in-class headphone amplifier, and superior audio conversion is perfect for musicians, songwriters, and electronic music producers who need UA quality in a compact package.


- Desktop 2 x 4 USB audio interface with class-leading 24-bit/192 kHz audio conversion
- Unison mic preamp and guitar amp emulations from Neve, API, Avalon, Manley, Marshall, Fender, and more
- Realtime UAD Processing allows near-zero latency tracking with classic UAD plug-in effects, regardless of software buffer setting
- Includes studio compressors, EQs, reverbs, and guitar amp emulations, and more as part of "Realtime Analog Classics" bundle
- Best-in-class headphone amplifier for loud, detailed, low-noise monitoring

Apollo Solo USB Includes the "Realtime Analog Classics" UAD Powered Plug-Ins Bundle:
- UA 610-B Tube Preamp and EQ
- Marshall Plexi Classic Guitar Amp
- Ampeg SVT-VR Classic Bass Amp
- Raw Distortion Guitar Pedal
- Teletronix LA-2A Compressor Legacy
- UA 1176LN Compressor Legacy
- UA 1176SE Compressor Legacy
- Pultec EQP-1A EQ Legacy
- Pultec Pro EQ Legacy
- Precision Delay Modulation
- Precision Delay Modulation L
- Precision Reflection Engine
- Precision Channel Strip
- Realverb Pro

All other UAD Powered Plug-Ins sold separately at www.uaudio.com. All trademarks are property of their respective owners.
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System Requirements:

- Windows 10 64-Bit Edition
- PC with available built-in USB 3 SuperSpeed (Type-A or Type-C port)
- Intel Core i-Series or Xeon processor
- USB 3 Type-C cable (not included)
- Internet connection to download software and authorize UAD plug-ins
- 6 GB available storage

All specifications are typical performance unless otherwise noted, tested under the following conditions: 48 kHz internal sample rate, 24-bit sample depth, 20 kHz measurement bandwidth, with balanced inputs and outputs.


I/O Complement:
- Microphone Inputs: Two
- Analog Line Inputs: Two
- Hi-Z Instrument Inputs: One
- Analog Monitor Outputs: Two (one stereo pair)
- Headphone Outputs: One stereo
- USB 3 SuperSpeed Port: One USB-C Type-C connector

A/D – D/A Conversion:
- Supported Sample Rates (kHz): 44.1, 48, 88.2, 96, 176.4, 192
- Bit Depth Per Sample: 24
- Simultaneous A/D conversion: Two channels
- Simultaneous D/A conversion: Four channels
- Analog Round-Trip Latency: 1.1 milliseconds @ 96 kHz sample rate
- Analog Round-Trip Latency with up to five serial UAD Powered Plug-Ins via Console application: 1.1 milliseconds @ 96 kHz sample rate


Frequency Response: 20 Hz - 20 kHz, ±0.1 dB

Line Inputs 1 & 2:
- Connector Type: 1/4" Female TRS Balanced (Combo XLR/TRS)
- Dynamic Range: 118 dB (A–weighting)
- Total Harmonic Distortion + Noise: –107 dBFS
- Input Impedance: 10K Ohms (differential)
- Gain Range: +10 dB to +65 dB
- Maximum Input Level (600 Ohm source): +20.7 dBu

Microphone Inputs 1 & 2:
- Connector Type: XLR Female, pin 2 positive (Combo XLR/TRS)
- Phantom Power: +48V (switchable per mic input)
- Dynamic Range: 118 dB (A–weighting)
- Total Harmonic Distortion + Noise: -108 dBFS
- Default Input Impedance: 5.5K Ohms (variable via Unison plug-ins)
- Gain Range: +10 dB to +65 dB
- Pad Attenuation (switchable per input): 20 dB (variable via Unison plug-ins)
- Maximum Input Level: +25.2 dBu (minimum gain, pad engaged)

Hi-Z Instrument Input:
- Connector Type: Female 1/4" TS Unbalanced
- Dynamic Range: 118 dB (A–weighting)
- Total Harmonic Distortion + Noise: -105 dBFS
- Input Impedance (variable via Unison plug-ins): 1M Ohms
- Gain Range: +10 dB to +65 dB
- Maximum Input Level (@ minimum gain): +12.5 dBu

Outputs 1 & 2:
- Connector Type: 1/4" Female TRS Balanced
- Output Impedance: 100 Ohms (differential)
- Dynamic Range: 115 dB (A–weighting)
- Total Harmonic Distortion + Noise: -106 dBFS
- Stereo Level Balance: +/-0.05 dB
- Maximum Output Level: +20.7 dBu
- Operating Reference Level: +14 dBu, +20 dBu (selectable)

Stereo Headphones Output:
- Connector Type: 1/4" Female TRS Stereo
- Dynamic Range (A–weighting): 115 dB (600 Ohm load), 114 dB (32 Ohm load)
- Total Harmonic Distortion + Noise (A–weighting): -97 dB (600 Ohm load), -88 dB (32 Ohm load)
- Maximum Output Power: 62 mW (300 Ohm load), 240 mW (32 Ohm load)

- Power Supply: External AC to DC
- AC Connector Type: Changeable blades (UL, VDE, UK, SSA, CCC)
- AC Requirements: 100V – 240V AC, 50 – 60 Hz
- DC Connector Type: Male plug, 2.1 mm x 5.5 mm, center positive
- DC Requirements: 12 VDC, ±5%
- Maximum Power Consumption: 10 Watts

- Operating Temperature Range: 32 to 95 degrees Fahrenheit (0 to 35 degrees Celsius)
- Storage Temperature Range: -40 to 176 degrees Fahrenheit (-40 to 80 degrees Celsius)
- Operating Humidity Range: 20% to 80%


- Width: 7.1" (179.9 mm)
- Height (front): 1.0" (25.2 mm)
- Height (rear): 1.8" (46.7 mm)
- Depth: 4.8" (121.1 mm)
- Shipping Box (Length x Width x Height): 8.5 x 6.4 x 2.63 inches (216 x 162 x 68 mm)

- Weight (bare unit): 1.38 lbs (0.63 Kg)
- Shipping Weight (with box): 4 lbs (1.8 Kg)

Package Contents:
- Apollo Solo USB 3 Audio Interface
- External power supply with changeable region-specific AC connectors
- Getting Started URL Card
Dimensions and Weight in Packaging
Heritage Edition: Includes premium suite of 5 UAD plug-in titles valued at $1,345
Shipping Weight: 3.25 lbs
Shipping Dimensions: 9 x 7 x 5 in
Manufacturer Part Number (MPN): UAD APOLLOSOLOUHE
Warehouse Resealed, Heritage Edition: Includes premium suite of 5 UAD plug-in titles valued at $1,345
Shipping Weight: 3.25 lbs
Shipping Dimensions: 9 x 7 x 5 in
Manufacturer Part Number (MPN): NFS UADAPOLLOSOLOUHE
Scratch and Dent
Shipping Weight: 3.25 lbs
Shipping Dimensions: 9 x 7 x 5 in
Manufacturer Part Number (MPN): APLSU
For support or warranty questions, please contact the manufacturer:
Phone: 831-440-1176
Web: https://help.uaudio.com/

Heritage Edition: Includes premium suite of 5 UAD plug-in titles valued at $1,345

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Plug-in Promo: Get up to $447 worth of plug-ins FREE!
  • Purchase and register this product to receive up to $447 in free plug-ins from Universal Audio! Offer ends December 31! Learn more »

Will Apollo Solo USB work on my computer?
  • Learn about Windows system requirements and compatibility with Universal Audio's Apollo Solo USB FAQ here: Learn more »

5 Plug-in Collections Included with Heritage Edition:
  • UA 1176 Collection, Teletronix LA‑2A Classic Leveler Collection, Pultec Passive EQ Collection, UA 610 Tube Preamp & EQ Collection, UA Pure Plate Reverb