thanks i plugged my phone into my s4 no crackles then i plugged it into the speakers no crackles that means its either my laptop or the rca cables however i went to audio settings, diagnostics and it started counting the dropouts(crackles it got to over 100 in 1 song and said my computer cant handle turn up usb buffer and sample rate i turned it all up to max still having problems any solutions. Oh the only thing that worked was i made the audio device my laptop and plugged in a 3.5 to rca in my laptop and it worked perfect except i couldnt cue in my headphones.