Will these need an amp? I'm open to a portable amp if it means much improved sound

Thanks I'll certainly give the a900x some research

Hey there I'm new to this so here goes. I love mostly reggae r&b and hip hop (stay with me). The issue I have is that my music has lots of bass so I don't see the need to go for a headphone targeted at bassheads. At present I'm leaning towards the dt770 but am open to advice. What I'm looking...