Audio Problems

well i bought this car, and the speakers seem to work fine but sometimes they would start screeching at higher volumes.. they are fine when the volume is under twenty but above twenty they sound gross... so if anyone can give some input into this it would be greatly appreciated :)

if you have an amp, the gains are set too high. If it's just the headunit, you are turning it up too loud - most aftermarket headunits are designed for max power at about half volume or so from their built in amps.

hmm i dont have an amp so it could be the head unit? its a really old model like kenwood 2003

they are all designed the same like that for the last 25-30 years