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Silver desktop audio interface with two combo inputs and a large rotary knob

Universal

Universal Apollo Solo Heritage Edition 2x4 Thunderbolt Audio Interface

SKU CH-4KXS-1CVA3

A desktop 2x4 Thunderbolt audio interface with 24-bit/192 kHz conversion, 1.1 ms latency at 96 kHz, two Unison preamps and 25 UAD plugins included

  • Pristine audio quality with 24-bit/192 kHz resolution for professional recordings
  • Ultra-low latency of 1.1ms at 96 kHz enables real-time UAD plugin monitoring
  • Versatile connectivity via 2 combo XLR-1/4" inputs, Hi-Z input, and balanced monitor outputs
  • Powerful UAD processing includes 25 plugins and LUNA Recording Software for classic hardware emulations
  • Unison technology lets you record through emulations like UA 610-B, LA-2A, and 1176 compressors

What the interface is and who it serves

The Universal Apollo Solo Heritage Edition is a 2x4 Thunderbolt 3 audio interface built for Mac and Windows users who need professional recording and real-time UAD processing in a desktop form factor. It delivers class-leading A/D and D/A conversion with two Unison mic preamps for capturing microphones, instruments, and line-level sources. The included LUNA Recording System gives Mac users a fully integrated music production application. Builders needing more simultaneous inputs or a different connection protocol should look elsewhere.

Capacity and headroom

The interface records at 24-bit/192 kHz resolution and achieves 1.1 ms round-trip latency at 96 kHz, providing headroom for detailed tracking and plugin-heavy monitoring sessions. Onboard UAD-2 processing runs the 25 included UAD plugins — such as the UA 610-B Tube Preamp & EQ, LA-2A, and 1176 compressors — without taxing the host computer. Sessions requiring more than two mic/line inputs or additional Hi-Z channels will exceed the physical I/O count.

Practical limits of the Thunderbolt connection

Thunderbolt 3 supplies the bandwidth and low latency that make real-time UAD processing possible on both Mac and Windows. The connection also carries power for the desktop unit, reducing cable count. Systems without a Thunderbolt 3 or compatible port cannot use the interface, and the LUNA Recording System remains macOS-only despite the hardware supporting Windows for core audio and UAD plugins.

Highlights

  • Pristine audio quality with 24-bit/192 kHz resolution for professional recordings
  • Ultra-low latency of 1.1ms at 96 kHz enables real-time UAD plugin monitoring
  • Versatile connectivity via 2 combo XLR-1/4" inputs, Hi-Z input, and balanced monitor outputs
  • Powerful UAD processing includes 25 plugins and LUNA Recording Software for classic hardware emulations
  • Unison technology lets you record through emulations like UA 610-B, LA-2A, and 1176 compressors

Specifications

No published specifications for this item yet.

Questions about this item

Will the Apollo Solo Heritage Edition work with my existing studio monitors and microphones?

The interface provides balanced monitor outputs and two combo XLR-1/4" inputs plus a Hi-Z input, so you can connect standard studio monitors, microphones, and instruments directly.

How can I verify the ultra-low latency is active after setup?

At a 96 kHz sample rate the round-trip latency measures 1.1 ms, which you can confirm in your DAW's audio settings or the Universal Audio control panel.

What cables and software come in the box versus what I need to buy?

The package includes the LUNA Recording System and 25 UAD plug-ins such as the UA 610-B Tube Preamp & EQ, LA-2A, and 1176 compressors; a Thunderbolt cable is not included and must be purchased separately.

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