Upgraded New Focusrite Scarlett 2i4 Ii 2nd Generation 2 In/4 Out Usb Audio Interface Sound Card For Studio Recording - Headphone Amplifier - AliExpress
What does the 'Input | Playback' dial on my Scarlett 2i4 1st & 2nd Gen do? – Focusrite Audio Engineering
Best Buy: Focusrite Scarlett 2i4 USB Recording Interface Red Scarlett 2i4