Yes the end result was to use series resistors. That was after trying an Lpad to preserve the damping factor. While the Lpad may look like a good approach on paper, unfortunately in practice it sucked. So much power gets lost through all the resistors that the amp was driven into clipping just to get the listening level loud enough. And yes, even with the series approach if you play very dense complex music and drive the cans to levels that are really not that healthy for your ears you may hear the amp clip. The mechanical damping and the different cable both have quite an influence on the sound. The changes are not just related to tonal balance, there are temporal differences too, i.e., the transients are better defined.
So I hope that it will be understood that the kit is a combination of mods, not just series resistors. And I hope it will be understood that these mods were developed solely with the Crack amp in mind.
If one is hesitant to purchase I think there should be some commentary not long after we ship the first run. About 1/3 of our planned initial run has been promised since announcing the release last night.