Review on 🔊 Earthquake Sound GLI-200 Ground Loop Isolator with Hum and Buzz Cleaning, RCA 600 Ohm In/Out by Brandon Addison

Looks and feels very high quality. The ability to turn your own RCAs on and off is a huge bonus when your setup is visible. After installing the Dayton DSP-408 I had a TON of hum coming through all the speakers. I have tried grounding on all my amps and even other things in the car but nothing has worked. Once I lined it up with the RCA INPUT DSP, almost all of the buzz went away. There is still a very high pitched hum, but this product performed better than I expected. I would advise trying it.