Radio not turning on; AVH-280BT

I was trying to setup some new speakers in my car and while I was testing them the rear speakers weren't playing so I switched some RCA cables while music was playing (cuz I'm clearly a professional....) and heard some popping noise. The radio stopped working. I went ahead and turned the car off, disconnected the battery and checked the fuse (on the back of the radio). The fuse was blown, I switched it and tried turning it on and nothing happened still. I checked the cars fuse box and they were fine. What should I do?