Review on 🎧 Syba USB Audio Adapter with Built-in Chip – USB Sound Card for Headphones and Microphones, USB to 3.5mm Jack TRS AUX Adapter with Separate Plug – SD-AUD63119 by Michael Hudson

Great sound. The different modes basically just boost the bass. However, if your headphones can handle it, they'll make them bang like crazy. Otherwise it sounds like garbage. The default no-boost mode is very clean and crisp, very flat. I like the first or second boost level. I also really appreciate the indicator lights showing frequency and ease of use.