Why does the output increase


I used the LP2985 and LP2987 chips to convert the output voltage to 5V and 3.3V respectively. Why did the output increase by 800mV to 5.8V and 4.1V?
128x128roseljr
Measure the voltage between your measuring 0v reference and the actual 0volt ground of the amp. There may be a differential of 0.8volts. This would make you see that difference on the measured output of the regulator. Have you added a capacitor on the output?
You would be better off asking this in DIYaudio.com where all the guys with the soldering irons are.

Best,

Erik