Os copio un extracto de un post de un foro internacional con el que estoy bastante de acuerdo por si sirve de ayuda

" On sound, contrary to popular belief Metal does not need mega low or big bass, as you have rightly identified it need dynamism i.e. ability to stop and start the bass notes quickly. This usually achieved by using speakers with light cones (higher sensitivity usually at the expense of low frequencies) and an amp with power and a high damping factor, having a close/sealed speaker also helps."