Bass traps or absorber panels?!

Hey! I am moving my studio and this time I want to make some acoustic treatment, but I am a little confused. If I build my own panels like the ones from Ethan "mini-traps", will they became bass traps or absorber panels? Soon I will post a 3D plan of my future studio, just need to finish it with "Sketchup". Any help will be great! Thanks :)

If they're 'soft' faced, they'll be somewhat broaband. How deep depends on the thickness, density, and distance from the front to the wall boundary. If they have a scrim facing or a membrane of some sort, they'll be more bass only oriented.