I checked out some of the music at your link and on SoundCloud. Some good tunes in there:
https://soundcloud.com/boombatmusic
Not saying I have art sense (or any sense for that matter), but what I would say from the start is that Boombat needs a logo, and then to start branding it on everything, especially ep covers, etc.
I wasn't particularly wild about either design, since I felt that neither conveyed a feeling for the music.
Boombat's previous "Last Lights" cover was artsy and conveyed the essence of the music:
Something minimalist and profound like the Last Lights cover would be good.
There are many ways to convey LOUD to strike people visually and viscerally.
Good luck to Boombat - strange name, but good sounds.
ADG