I've just completed (or so I thought) my first DIY project after having kept my iron in a closet for a decade.
I've decided to start small with a CMOY amp and low and behold I mixed up + and - and fed the opamp with the wrong polarity.
After correcting my mistake the opamp gets really hot (untouchable) after about 5 seconds of adding power.
The power supply circuit is working fine, puts out 4.45 Volts both sides.
I do hear something when powering it up, although it's not louder than going straight. There's no short circuit between input and output, after taking the power off the music dies slowly after a couple of seconds.