Focusrite Scarlett 18i20 3rd Gen USB Audio Interface
- 18 channels, XLR and instrument inputs
- 192 kHz maximum sample rate
- 35 kHz listed frequency response figure
- 19 inches wide, 1.83 inches deep, 10.23 inches high
- 4.7 pounds listed weight
- Talkback mic and speaker switching built in
- USB-C to A cable and IEC power cable in the box
- 2 year warranty
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A high channel count interface for a home or project studio that records several sources at once and runs studio monitors. The included cable ends in USB-A, so a computer with only USB-C ports needs another cable.
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ASIN: B018W7BW36Model: AMS-SCARLETT-18I20-3GCategory: Audio Interfaces
Overview
Recording a band or several microphones at once is the job Focusrite built this interface for. Microphones plug into XLR inputs and guitars into instrument inputs, audio travels to the computer over USB, and mains power arrives through an IEC cable.
High channel count with talkback and monitor switching on the unit turns a room into a working studio, as Focusrite puts it. Producers get one box for inputs, monitors and headphones. Preamp, output and connector counts are not broken out in the listing, so plan the routing against the maker's manual.
Who it's for
Studios that record several players together and switch between pairs of monitors will use what this unit offers. Single-voice recording at a desk needs far less hardware.
Pros and cons
- High channel count for multitrack sessions
- Talkback mic built in
- Speaker switching for multiple monitors
- Works with all recording software per listing
- Needs mains power through the IEC cable
- Only a USB-C to A cable included
- Preamp and output counts not listed
- Wide chassis for a small desk
Performance notes
How many sources record at once depends on the channel count, and recording quality depends on the preamps and converters behind those inputs. The talkback mic lets the engineer speak to performers, and speaker switching moves playback between monitor pairs without repatching. Sample rate sets the ceiling for capture resolution.
Specifications
| Brand | Focusrite |
|---|---|
| Model | AMS-SCARLETT-18I20-3G |
| Dimensions & fit | |
| Item weight | 4.7 pounds |
| Item Dimensions D x W x H | 1.8 × 19 × 10.2 inches |
| Compatibility & installation | |
| Connectivity Technology | USB |
| Warranty & support | |
| Supported Software | All Audio Recording Software |
| Warranty Description | 2 years |
| Other details | |
| Number of Channels | 18 |
| Audio Input | XLR, Instrument |
| Maximum Sample Rate | 192 KHz |
| Frequency Response | 35 KHz |
| Item Type Name | USB Audio Interface With Pro Tools | First |
Frequently asked questions
Can the Focusrite Scarlett 18i20 3rd Gen connect to a laptop with only USB-C ports?
The included cable is USB-C to A, so a computer with only USB-C ports needs a separate USB-C cable or an adapter, which is not in the box.
What software comes with the Scarlett 18i20 3rd Gen?
The item type names Pro Tools | First, and supported software is listed as all audio recording software.
Does the Scarlett 18i20 3rd Gen fit in a rack?
The listing gives a width of 19 inches but does not mention rack ears or rack mounting.