The bottom end is full but not overpowered

The additional drivers appear to clear up the high-mids and highs, very natural sounding crossovers and very low end extension, but not overwhelming

I looped a song for probably 6 hours at night and by the time I woke up, the highs were burnt off just enough and the low end was strong

A bit of twang on the highs, the mids are nice an open and the low end is very decent at mid-high volume

The quality of these from the deep bass to the crystal clear high end, just far surpasses any that I have ever used

If comparing these to the ZSTs, I would say these open up the top end a little more which were lacking/darkened in the ZSTs, the bass doesn't hit your eardrums quite as hard which may be less appealing to some who would compare to the harder initial hitting ZSTs, but The ZS5s are absolutely full low-end reaching down to the 40's and 30'sHz sustainably and they sound quite nice

If comparing these to the ZSTs, I would say these open up the top end a little more which were lacking/darkened in the ZSTs, the bass doesn't hit your eardrums quite as hard which may be less appealing to some who would compare to the harder initial hitting ZSTs, but The ZS5s are absolutely full low-end reaching down to the 40's and 30'sHz sustainably and they sound quite nice