E46 Stereo POP when starting

[qube 3570]

after installing the dynavin clone into my car, when i turn the key to position 1 to get power for the stereo, it makes a couple of loud popping noises while starting up

the speakers themselves are working fine and the problem only started after removing the factory unit and replacing it with the android based headunit.

any ideas?

[Haitoman 110]

It's actually quite normal for the output of an amp to make speakers pop at switch on. That is why you usually turn on the amp or whatever and then about two seconds later you hear a click and then sound.

The solution is to build a short delay circuit eg. http://www.eleccircuit.com/simple-delay-speakers/ so that a double pole relay connects the speakers a few seconds after the amp or whatever is switched on.

It's normal, just you usually can't hear it.

[qube 3570]

its quite loud though and it wasnt there before. only after i switched to the other headunit...?

[Haitoman 110]

its quite loud though and it wasnt there before. only after i switched to the other headunit...?

Yeh, it is the pre-amp in the new head unit. It is quite normal as I said. Build a simple speaker delay.

[zero 1162]

As Andrew said above. Its also called a 'speaker dethump' circuit