DTP = Dekoni velour pads + 2 sheets of Toilet Paper After getting E2 and experiencing recent ZMF loaners (aeolus & auteur), I nearly lost my love toward hd800. While my 800 (very recent production; sn later than 48000) doesn't have specific frequency issues, the "entire" treble tonality doesn't work for me, either. Before completely giving them up (eqing lose too much to my ears), I decided to give them a last chance. Admittedly, there are a bunch of known mods (sdr, sbaf, vader) for hd800. I can't (and won't) say that my mod is superior. But this mod specifically serves to my needs -- quick and easy. Literally, the most difficult part is to detach stock pads. lol How to mod Remove (stock) pads and dust covers Place two sheets of toilet papers nicely Put dust covers in again, and attach dekoni pads Done! Dekoni velour was chosen mostly because of my material texture preference (and costs haha). Speculating fenestrated sheepskin or hybrid do the similar job.. but didn't test. Finding the right toilet papers may be trickier than said. Honestly, I was surprised that different tps caused different sonic changes. Some changes were measurable but others were only caught by ears. Of course how many sheets to put is also an important consideration. 2 just worked for me best. I settled into the combination of the following two products: https://www.amazon.com/gp/product/B07BWNXMQZ/ref=oh_aui_search_asin_title?ie=UTF8&psc=1 https://www.amazon.com/gp/product/B074CRK54X/ref=oh_aui_search_asin_title?ie=UTF8&th=1 Now, let me share measurements taken during the modding process. Minidsp EARS with sbaf-compensation. All the measurements were taken with [email protected] calibrations. As shown in the graph, 3-9 khz region is successfully toned down. Bass seems a bit lost in quantity. However, DTP also took out mid-bass hump that the stock inherently had (not as severely as hd650 though). Sub-bass sounds much deeper than the graph suggests. Maybe a bit too over-damped. But I prefer modded bass to stock bass any day. Much cleaner and more articulate -- willing to lose a few decibels! This graph shows the greatness of toilet papers. Without them, 6k peak is more evident, both measurably and to my ears. Funny thing is that there is only slight difference between with and without dust covers, which largely differ from what I heard. Without dust covers, sounds very strange.. nearly unlistenable. Honestly to my ears, DTP-modded hd800 sounds much closer to aeolus than to stock 800. I can't say both sound similar but they share some similarly tasteful coloration. Then let's take a look at how DTP mods behave in the time domain. (Note: these are not impulse responses but step responses. Likely bugs in the current version of rew. Also ignore some ringings of stock after 6ms) Here are (1/12 oct wavelet) spectrograms to compare DTP and stock More subjective impressions to come later. By the way, dekoni 800 pads are really big. Visually very satisfying..