The new Mr. Black Pedals Stereo Double Tracker is a serious BEAST of an effects pedal.
If you listen to this clip with headphones on or with a decent set of speakers, you can hear the dramatic change in sound when the pedal is engaged after around 10 seconds or so.
You can of course hear the pedal with just your phone speakers as well, but if you want to get a more accurate idea of the stereo presentation then headphones are highly recommended!
Hope you dig the chugs!