Audio interface Focusrite Scarlett 4i4 4th Gen — 4 In / 4 Out USB, 2 mic preamps

The Focusrite Scarlett 4i4 4th Gen is a compact desktop USB audio interface offering four inputs and four outputs with two built-in microphone preamps. It is designed for recording, mixing and monitoring in home studios, podcast setups and small project environments where multiple I/O channels, low latency and reliable mic preamps are required.

Advantages

The interface provides two high-quality microphone preamps with phantom power and Air mode for enhanced vocal presence. It features two instrument inputs and four line inputs for flexible signal routing, plus four balanced line outputs and one headphone output for monitoring. Additional functions such as Auto Gain, Clip Safe and Loopback simplify gain staging and content capture. Compact desktop form factor and USB Type-C connectivity allow bus-powered operation or use with the included external 5V 3A power supply.

Suitable for

• Home recording and project studios
• Podcasting and livestreaming with multitrack routing
• Recording vocals and instruments with low latency
• Mixing and monitoring with multiple outputs

Key specifications

• Inputs/Outputs: 4 in / 4 out (simultaneous I/O 6 x 6 including loopback)
• Microphone preamps: 2 with phantom power and Air mode
• Instrument inputs: 2
• Line inputs: 4
• Line outputs: 4 (balanced)
• Headphone outputs: 1
• Loopback: yes
• Converter resolution: 24-bit / 192 kHz
• Connectivity: USB Type-C (USB 2.0 protocol)
• Power: bus-powered (USB 5V @ 1.5A) or included external 5V @ 3A supply
• Form factor: desktop

How to use

Connect the Scarlett 4i4 to your computer using the supplied USB-C cable (or USB-A adaptor) and install the Focusrite drivers or control software if required. Power the unit from the USB bus for basic operation or use the included external 5V 3A adapter for increased stability. Plug microphones into the XLR inputs and enable phantom power when using condenser microphones. Use the instrument inputs for guitars or basses, and line inputs for external gear. Route outputs to studio monitors via the balanced line outputs and plug headphones into the dedicated output for direct monitoring. Adjust input gain, Air mode, Auto Gain and Clip Safe as needed, and configure I/O and loopback routing in your DAW or streaming software.

Usage recommendations

For best results, enable Air mode for vocal tracks to add presence, monitor levels to avoid clipping, and use the external 5V 3A power supply when driving multiple outputs or bus-powered USB ports with limited current.