slight pop/ crackle on power up

[onis_uk]

ive got a arjen ta2020 mk3 board and a smps i get a very small pop/crackle on power on of the amp, how do i correct this problem ??

[Obe1]

Hi onis,

I've got the older MKII version. If I power the MKII on with nothing connected to the input wires I get virtually no pops or crackles. Likewise, if I do have a music source connected and that source is up and running before applying power to the MKII, I get virtually no pops or crackles. Conversely, If the MKII is powered on before the music source is plugged in or turned on, then I do get some unpleasant bursts of noise.

Try playing around with the power up sequence of your MKIII and your music sources to see if that helps.

[onis_uk]

yep same here but what is causing it ?? and how do i cure it...? is it a ground loupe ?

[Obe1]

Hi onis,

Ground loop problems typically create a constant hiss or hum. What you described is just a momentary pop / click, so that's not it.

I can't tell you all the things that can induce this pop / click issue, but I do know that capacitors in the source equipment defiantly can cause this problem.

In my case, I just make sure to power on the amp after I have my source connected and turned on. Likewise, I power the amp off before disconnecting or turning off the source.