UPDATE: so I went back to the drawing board with the stacking magnets on a 58x and I think the improved treble was actually some glare/ringing that the air gap flux was helping with. Also I worked to correctly implement the bucking magnet by the side of repulsion etc. and it worked good at first...

I dont think you can, it is part of the overall driver, I mean if your not worried about breaking them or if anyone has done a tear down video then go for it, I don't think it is possible to do this mod to them so that is why I haven't done it. I am Sorry :(

Yes sir! Also here are some measurements I took, It doesn't measure bass below say 100hz but still useful to prove the sonic difference. They will be linked as stock, then large ring magnet, then smaller very strong magnet. Also for references I use mine with dekoni velour pads as well as...

Hey Slater I just wanted to say thanks for giving me the Idea to add magnets to my hd58x, I put a magnet with over 2 Tesla of surface gauss(cleanest sound) and it has worked out pretty good, Ive tried a magnet that weighs a little more and has about 700 gauss and both are good(cleaner than stock...