Hey peeps

Not had the car 2 weeks yet so not read up much on the sound system
But I noticed yesterday and today when I play through my iphone there is a cracking noise
It tends to happen as the songs are changing from say verse to chorus
I think it might be a faulty amp struggling with the change?
And before you say it no I'm not trying to make my ears bleed with the volume! lol
Any one had anything like this or know what the problem is?
It can't be the quality of the songs as they are 320kbps
Any help/ideas would be great, cheers