"click" noise on phantom gold

[jonstatt]

hi!, i just get a second Phantom gold, the sound is amazing in stereo pair!, but i notice that when i press play on my iPhone it sounds a "click" noise on the new one phantom gold speciffic on the tweeter and when i stop the music it makes again, also the "first" phantom makes the noise but much less loud.. is that normal that some phantoms react different?
does anyone have some answers?
Thanks!

I think the click is the device coming out or going in to power saving. One of mine is a bit louder than the other too. The louder one was made week 47 and the other week 45