So, in this case "DT" is where "D" is for "duct" and "T" is for "tape".

True, this is just some experimenting. The tape is mainly for bass as I don't have the right pads for good bass presence and darkening up the sound to my preference. I need to grab some nice deep pleather or leather pads for it. The rest of the fixes for the glare and resonance are done with the other mods.