help head unit

So I wanted to upgrade my old RV head unit. It’s an ancient Linear series. I bought just a cheap regular android radio off Amazon. Following the diagrams on old and new, I have power and functional headunit, but no sound at speakers. Amp keeps cutting off power. I also tried to bypass using...

I have a Kenwood KDC-BT742U and everytime I turn up the volume the bass seems to shake it or something and it turns off the sound, the bass is still there, the head unit is still on, its not reading protect mode, but sometimes when I just gently flick the front of the radio the sound will come...

right now im not trying to break the bank but i am looking for a headunit the can run 2 amps. i have a sony head right now and it ***** but heres what i have so far. 1 alpine mono amp mrp-m500, 1 4 channel alpine pdx-4.100, 4 5.25 alpine type r speakers with one 12' type r sub in a jeep...

i dont know anything about cars. but the head unit (which i JUST learned what that was) is a peice of crap. my cig lighter doesnt work. i cant charge my phone or listen to anything but the radio. i wanted to install a head unit that has an aux port and a USB port. i figured i could find one for...