Review on PowerSource 65W UL Listed Long AC Adapter Charger for Dell Latitude 3000, 7000, and E5000 Series Laptops with 14Ft Power Cord by Kamil Campbell

I bought this as a second power supply for my Dell E5450 laptop so I can transport it from place to place without messing around with horsepower. The problem is that this power supply produces a very noticeable hum/hum through my USB connected audio system, which means that the problem is likely due to RF shielding. This is a very serious problem for me as my main use for this laptop is music. I know it's a PS too because when I plug an original Dell branded PS into the same outlet using the same app, there's no sound at all. I assume it will work on a laptop as long as you never want to use the audio in the same room, but that's useless to me. Now I have to buy a "real" Dell PS and throw it away.