Hear "coil whine" coming out your speakers? Or perhaps the dreaded 60Hz hum? In this video I discuss a few of the ground loop isolation solutions I tried, and how well they worked.
Pyle PHE300: https://www.amazon.com/Compact-Mini-H...
USB isolator: https://www.amazon.com/HiLetgo-ADUM31...
MPOW isolator: https://www.amazon.com/Mpow-Ground-Is...
Hosa "ground lifter" (incorrectly manufactured): https://www.amazon.com/Hosa-GLT-255-F...