Product Price I/O Count Number of Channels Sample Rate (Hz) Bit Depth (bits) Latency (ms) Thunderbolt Version Power Supply
Universal Audio Apollo x4
US
£1147.43 12 x 18 12 x 18 192 kHz 24-bit 1.1 ms at 96 kHz Thunderbolt 3

The Apollo x4 is a professional desktop Thunderbolt 3 audio interface with four Unison mic preamps, 24-bit/192 kHz conversion, and QUAD Core DSP for real-time UAD plug-in processing. Its 12 x 18 I/O and dual headphone outputs suit producers, engineers, project studios, and multi-microphone recording setups.

★ Ideal for

It suits buyers prioritizing durability and build quality because it combines a robust desktop design with four Unison preamps, improved Gen 2 converters, enhanced monitor and headphone outputs, and an external power supply.

Universal Audio Apollo Solo Thunderbolt 3 Audio Interface Heritage Edition APLS/HE
US
£338.70 2 x 4 2 inputs, 4 outputs 192 kHz 24-bit Near-zero Thunderbolt 3

The Apollo Solo Heritage Edition is a compact Thunderbolt 3 interface with two Unison microphone preamps, premium 24-bit/192 kHz conversion, onboard UAD processing, and a bundled collection of classic studio plug-ins. Its portable all-metal design suits home studios, vocalists, guitarists, producers, and mobile recording setups.

★ Ideal for

It suits anyone prioritizing durability and build quality because it combines a robust all-metal chassis with bus-powered Thunderbolt 3 connectivity, premium analog components, and a low-noise headphone amplifier.

Universal Audio Apollo X4 Quad Thunderbolt 3 Audio Interface APX4/HE
US
£1475.06 12 in / 18 out 12 input channels and 18 output channels Up to 192 kHz 24-bit 1.1 ms at 96 kHz input to output Thunderbolt 3

The Apollo x4 Heritage Edition is a premium desktop Thunderbolt 3 interface with four Unison mic preamps, two Hi-Z inputs, extensive analog and optical I/O, and QUAD Core UAD processing. Its 24-bit, 192 kHz conversion and near-zero-latency monitoring suit musicians, producers, and project studios requiring professional recording quality.

★ Ideal for

It suits durability and build-quality priorities through its uncompromising analog design, superior components, premium build quality, external AC power supply, and robust 12-in/18-out studio-focused construction.

Universal Audio Apollo x8 Gen 2 Thunderbolt Audio Interface - Essentials+ Edition (APX8G2-ESS+)
US
£1844.01 18 x 24 24 192 kHz 24-bit 1.1 ms at 96 kHz 3

Rackmount Apollo x8 Gen 2 (Essentials+ Edition) is a Thunderbolt 3 interface built for low-latency tracking with onboard HEXA Core DSP for real-time UAD processing. It provides 4 Unison mic preamps, 2 Hi-Z inputs, 8 line inputs, plus extensive digital I/O (ADAT, S/PDIF, and word clock) for integrating studio gear. It suits producers and engineers running larger multi-input sessions who want DSP-accelerated monitoring and an included Essentials+ plug-in suite.

★ Ideal for

For best durability and build quality, choose Thunderbolt 3-based Apollo x8 Gen 2 since it's explicitly specified with an included external 12 VDC at 6 A power adapter and uses elite-class conversion with low-jitter Dual-Crystal Clocking, indicating a studio-grade external power setup and robust internal conversion design.