The Focusrite Scarlett 18i8 (3rd Generation) is a versatile USB audio and MIDI interface designed for musicians, producers, and content creators who require multiple inputs and outputs for recording and monitoring. Its compact form factor and robust feature set make it suitable for both studio and mobile recording environments.
Focusrite Scarlett 18i8 18×8 USB Audio/MIDI Interface
Audio Inputs & Outputs
Analog Inputs:
4 x combo XLR-1/4″ TRS inputs (2 with mic/line/Hi-Z, 2 with mic/line)
4 x 1/4″ TRS balanced line inputs (rear panel)
Analog Outputs:
4 x 1/4″ TRS balanced line outputs
2 x 1/4″ TRS headphone outputs with independent level controls
Digital I/O:
1 x TOSLINK optical input (ADAT) for up to 8 additional channels
1 x RCA coaxial S/PDIF input
1 x RCA coaxial S/PDIF output
MIDI I/O:
1 x 5-pin MIDI input
1 x 5-pin MIDI output
Microphone Preamps
4 x 3rd Generation Scarlett mic preamps with up to 56 dB gain range
Switchable Air mode for enhanced high-frequency response, emulating Focusrite’s ISA preamps
+48V phantom power available for condenser microphones
Performance
Conversion:
24-bit/192 kHz A/D and D/A converters
Dynamic Range:
Mic Inputs: 111 dB (A-weighted)
Line Inputs: 110.5 dB (A-weighted)
Line Outputs: 108 dB
Headphone Outputs: 104 dB (A-weighted)
Frequency Response:
20 Hz – 20 kHz ±0.1 dB
THD+N:
Mic Inputs: < 0.0012%
Line Inputs: < 0.002%
Headphone Outputs: < 0.002%
Software & Connectivity
USB-C connectivity (USB 2.0 protocol) compatible with macOS, Windows, and iPadOS
Includes Focusrite Control software for routing and monitoring
Bundled software:
Ableton Live Lite
Avid Pro Tools Intro+
Hitmaker Expansion (featuring plugins from Antares, Softube, XLN Audio, and more)
Physical & Power
Dimensions: 9.49″ x 6.28″ x 2.4″ (241 mm x 159.5 mm x 61 mm)
Weight: Approximately 2.94 lbs (1.335 kg)
Power Supply: 12V DC, 1A (included)






