Amp Camp Amp - ACA

this is true, the sound is really excellent. I listen last night for 5 hours. this is my first diy amp, my first real amp and I do not know if it was normal. it seems not.

I'm really not an expert in electronics, and I do not understand the way to follow. if you can explain to me the controls to do. if you have the patience.
 
I also get the whale song on power up and the thump on power down.

I use a single laptop supply for both channels going through a double switch.

I think it's pretty normal. I also have the whale and thump😉
The 2 laptop PSU's are Lenovo 90W 20V.
When I tried to measure the voltages when powering on, the laptop PSU has difficulties to power up, voltage jumps up and down, it takes around 5 to 6 seconds till stable output voltage. Measuring at the 230V side gives also the strangest power consumption readings till stable.

I don't care! After those few seconds they are stable and playing very fine😀
Thump is less than my AlephJ
 
LM317 regulated PSU

Hi,

I have built regulated supply for my ACA. It is rectifier - 10,000uF - LM317 - 470uF.

When I replace 470uF output cap for 1000uF the sound is worse - congested, less dynamic, less bass, mids stand out. WHY is that? All electrolytic caps are ordinary one, no low ESR.

Thanks.