I had some extra parts around so I put them to work.I had two extra 2.5 #14 solen air core inductor and a bunch of 1.8 Kimber Kaps so I replaced the stock 2uf's with the 1.8 Kimber Kaps and added a Dayton .22 uf film and foil by-pass cap to come closer to the 2uf,not sure If needed to put the .22 in but I had a few of those as well so why not, The high end sound is much nicer now and as far as the low end I am not sure but I know the Heresy II uses coil inductors so it must be a better way to go but unless you want to spend the money I think the stocks are ok . The Solen aircores are a big plus after listening and comparing the two ,one with new caps and old woofercoil to the one with new caps and new Solen aircores made the old bass sound muddy.