![Amazon.com: Focusrite Scarlett 4i4 3rd Gen 4x4 USB Audio Interface Bundle with Knox Headphones and 2 XLR Cables (3 Items) : Musical Instruments Amazon.com: Focusrite Scarlett 4i4 3rd Gen 4x4 USB Audio Interface Bundle with Knox Headphones and 2 XLR Cables (3 Items) : Musical Instruments](https://m.media-amazon.com/images/I/71aZCAwhFRL.jpg)
Amazon.com: Focusrite Scarlett 4i4 3rd Gen 4x4 USB Audio Interface Bundle with Knox Headphones and 2 XLR Cables (3 Items) : Musical Instruments
![Amazon.com: M-Audio Fast Track Pro 4x4 Mobile USB Audio/MIDI Interface with Preamps : Musical Instruments Amazon.com: M-Audio Fast Track Pro 4x4 Mobile USB Audio/MIDI Interface with Preamps : Musical Instruments](https://m.media-amazon.com/images/I/718VhiVl1ML._AC_UF894,1000_QL80_.jpg)
Amazon.com: M-Audio Fast Track Pro 4x4 Mobile USB Audio/MIDI Interface with Preamps : Musical Instruments
![M-Audio Fast Track Pro 4x4 Mobile USB Audio/MIDI Interface with Preamp for Sale in San Diego, CA - OfferUp M-Audio Fast Track Pro 4x4 Mobile USB Audio/MIDI Interface with Preamp for Sale in San Diego, CA - OfferUp](https://images.offerup.com/AinwId8CXru8JLycAQkyeRDI9Ag=/1922x1442/c411/c411fb2b48374e8fa41b9a8cbb76e6fb.jpg)