The Bluetooth (v5) works great on the Fosi amp, it connects to everything without a hitch making it an ideal solution for those quick connect-and-play situations from a phone. But, to squeeze more out of my system for more enjoyable listening sessions, wires are your best friend.

I got this 3.5mm to RCA cable to connect the Fosi BT20A Pro to my MacBook Pro to test the difference, and yeah! It gives those speakers a more detailed and bodied sound as I expected.