Ready for cranking out tracks at home or on the road with your Windows computer, the Universal Audio Apollo Solo USB Heritage Edition desktop 2×4 USB 3.0 Type-C audio interface combines the sound, feel, and flow of analog studio recording with SOLO Core real-time UAD processing and a hearty bundle of 25 stellar UAD plug-ins.

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Apollo Solo USB is a desktop recording audio interface for Windows — delivering class-leading audio conversion, two Unison mic preamps, and a suite of onboard UAD plug-ins for recording album-quality results, in real time.

This compact 2×4 interface starts with esteemed Apollo A/D and D/A conversion to sonically outperform anything in its class. And with its Unison technology and built-in UAD‑2 processing, you can record through classic studio tools including the UA 610‑B Tube Preamp & EQ, LA‑2A and 1176 compressors, and more — with near‑zero latency.

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 preamps. These include the bundled UA 610‑B Tube Preamp, plus authentic mic preamp emulations from Neve® and API,® plus guitar amp emulations from Fender® and Marshall® — complete with their signature impedance, gain stage “sweet spots,” and component‑level circuit behaviors.*

The secret to Unison is its hardware‑software integration between Apollo Solo USB’s mic preamps and its onboard UAD-2 processing. Simply place a Unison preamp plug-in on your mic input in Apollo’s Console software, and it physically reconfigures Apollo’s impedance and gain staging — giving you the classic tube and transformer sounds of the world’s most recorded mic preamps and guitar amps.

A Full Suite of Classic
Studio Processing Onboard

Right out of the box, Apollo Solo USB provides a suite of incredible analog emulation plug‑ins including the world’s only authentic Teletronix LA‑2A and 1176LN compressors, Pultec EQs, and much more. From the tube warmth of the Pultec EQ on guitars, to the gentle limiting of the LA‑2A on vocals, your recordings will take a giant leap forward in rich, sonically complex analog sound.

Vintage Guitar and Bass Amps

For guitarists and bassists, Apollo Solo USB includes Unison technology on its front panel instrument input — giving you access to dead-on emulations of amps like the Fender® ’55 Tweed Deluxe, Ampeg® B‑15N Bass Amplifier, and the included Marshall® Plexi Classic — all available at near-zero latency for songwriting and recording.

Best-in-Class Headphone Amplifier

Apollo Solo USB’s onboard headphone output is louder and punchier, with lower noise and flatter frequency response versus any interface in its class. This means you can confidently track and mix using headphones, knowing you’re hearing every sonic detail.

Ready to Go

With its robust all-metal construction and exceptional sound quality, Apollo Solo USB is the only desktop audio interface for Windows users that truly delivers professional results. It’s like having a virtual analog studio that fits onto any desktop, and easily travels in your laptop bag.

Available as Apollo Heritage Edition

Featuring 5 premium UAD titles— including complete plug-in Collections of our award-winning Teletronix® and UA 1176 compressors, Pultec® EQs, UA 610 mic preamps, and more — Apollo Heritage Edition gives you a curated analog studio, right out of the box.

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Universal Audio


Tech Specifications

Universal Audio Apollo Solo Specs

Form Factor Tabletop
Display 5 x Multi-Segment LED Meter
Channels of I/O Analog:
2 Inputs / 4 Outputs at 192 kHz
Max Sample Rate/Resolution 192 kHz / 24-Bit
Number of Mic Preamps 2
Input Level Adjustment 1 x Knob
Solo/Mute None
Pad Mic:
-20 dB (Switchable per Channel)
High-Pass Filter 75 Hz, 12 dB/Octave
Expansion Slots None
Analog Audio I/O 2 x Combo XLR-1/4″ TRS Balanced Mic/Line Input
1 x 1/4″ TS Unbalanced Hi-Z Input (Front Panel)
2 x 1/4″ TRS Balanced Monitor Output
1 x 1/4″ TRS Unbalanced Headphone Output (Front Panel)
Phantom Power +48 V, Selectable On/Off (Selectable on Individual Inputs)
Digital Audio I/O None
Host Connection / USB 1 x USB Type-C (USB 3.0 / 3.1 Gen 1)
USB (Non-Host) None
Sync I/O None
Network I/O None
Wireless Connectivity None
Memory Card Slot None
Frequency Response System:
20 Hz to 20 kHz ±0.1 dB
Gain/Trim Range Mic/Line/Hi-Z Inputs:
+10 dB to +65 dB
Max Input Level Mic Inputs:
+25.2 dBu (Min Gain, with Pad)
Line Inputs:
+20.7 dBu
Hi-Z Inputs:
+12.5 dBu (Min Gain)
Max Output Level Monitor Outputs:
+20.7 dBu
Headphone Output Power 240 mW into 32 Ohms
62 mW into 300 Ohms
Impedance Mic Inputs:
5.5 Kilohms
Line Inputs:
10 Kilohms
Hi-Z Inputs:
1 Megohm
Monitor Outputs:
100 Ohms
Dynamic Range Mic/Line/Hi-Z Inputs:
118 dBA
Monitor Outputs:
115 dBA
Headphone Outputs:
115 dBA (600-Ohm Load)
THD+N Mic Inputs:
-108 dBFS
Line Inputs:
-107 dBFS
Hi-Z Inputs:
-105 dBFS
Monitor Outputs:
-106 dBFS
Headphone Outputs:
-97 dB (600-Ohm Load)
-88 dB (32-Ohm Load)
Digital Audio
Sample Rates Up to 192 kHz
Sample Rate Conversion None
Bit Depths 24-Bit
Latency 1.1 ms at 96 kHz (Input to Output)
Sync Sources Internal
OS Compatibility Windows 10 (64-Bit Only)
Included Software None
Supported Drivers/API & Plug-Ins Windows Driver Downloadable from Manufacturer
Processor Requirement PC:
Intel Core i3
Intel Xeon
Storage Requirements 6 GB
Mobile Device Compatibility None
Required Hardware Available USB 3.0 / 3.1 Gen 1 Port
USB Cable (Not Included)
Internet Connection Required for Registration, Software/Driver Download, Plug-In Authorization
Power Requirements AC/DC Power Adapter (Included)
AC Input Power 100 to 240 VAC, 50 / 60 Hz
AC/DC Power Adapter 12 VDC, Center-Positive (Included)
Power Consumption 10 W
Operating Humidity 20 to 80%
Operating Temperature 32 to 95°F / 0 to 35°C
Storage Temperature -40 to 176°F / -40 to 80°C
Dimensions 7.1 x 4.8 x 1.8″ / 18.03 x 12.19 x 4.57 cm
Weight 1.4 lb / 0.6 kg
Packaging Info
Package Weight 3.255 lb
Box Dimensions (LxWxH) 8.5 x 6.4 x 4.6″



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