Popping speaker with aftermarket radio
Hey guys, so a couple weeks ago I bought and installed a used boss radio in my truck, ( i know, i know, first problem was buying a boss). I kept hearing a popping coming from the back right speaker. It sounded like **** and half of it didn't work so I returned it and put my stock radio back in. Everything sounded great with the stock stereo. No popping.
A few days later, I bought a new radio, (Kenwood DDX371). Still hear the same popping noise.
Few important details:
I used the Metra 70-5521 wiring harness (I plugged the two RCA connectors into the Sub part of the radio) I used a new harness with the new radio.
2004 F-150 FX4 extended cab with the stock 6 CD-changer (no aux ports but had the aux button) and has the sub under the back seats.
Does anyone know what could be causing this popping????