Are dual amps any good or are they entry level junk amplifiers ?

Junk! Dont so it man, u have the right hunch. They are unreliable and get extremly hot esoecialy in the summer, itl last about a month and ul use EVERY BIT of the warranty. I made the mistake of buying one a few years ago and NEVER again lol. Go alpine, JL, Rockford, Clarion, Harmon Kardon, Hifonics, etc... Just ro name a few.