I went to a chill French bakery/cafe last week who only sells bread and hot drinks while the owner plays the piano and people sit and talks at their table. I went and ordered a croissant and cup of hot chocolate since its chilly outside.
One of the staff with a sour discouraging face looked at me and told that the hot chocolate is “very bitter” and if I’m sure if I want it, “its not the usual Swiss Miss, it’s made from pure ground cacao and is very bitter..”. From there I’m sure I know what he was describing and I definitely want it 
I can describe the Grand Berserker 2 the same, the treble is Dark. The smooth treble, rich and deep bass and laid back just like me enjoying my hot flavourful cocoa last week 
Like biting a 75% dark chocolate it wont please you the first bite. Even with the step back vocals(but fairly good quality) once the sub-bass kicks, you’re in for full deep flavourful lows.
I have been rotating it on my playlist. I love it with my Hip Hop and R&B playlists that has nice beats.
But I love it the most with Lo-Fi HipHop and chill music, oh man it’s so smooth and non fatiguing its golden. I have been looking for a bassy set that wont hurt my ears for long listening. This seems to be the perfect one 
Many thanks @Rikudou_Goku for the fast shipment!