Did a listen to settings yesterday. New battery makes the smoother character of slow roll fall nicely into place. I use it, slow roll, med gain and phase inverted when possible (rotate the pins on my customs). The phase inversion is a non-issue for most as many phones are already inverted and it's a subtle change. GR10, DB2s, Heir 4a, SM64, NVX, R-50, Fit ear, BA200. T-Peos, UE700, TF10, UE900, GR07, some Westones etc. are all inverted or sometimes inverted. (just checked some of Rin's graphs). In these cases the DX90 would set them right if it is inverted. To be clear, the DX90 has not been measured as inverted, just my sonic impression which could be influenced by tonality.
I slightly prefer med gain as it's a bit more delineated for me while still having good flow. I think the slow filter works well with it. The rounder high gain position may be better if you are using a silver cable etc, or just prefer it but I like med with my jh13s and hybrid cable. Low gain sounds a little tight to me but there will likely be scenarios where it will also be a good choice. I quite liked the extra presence of the new FW when it came out and was somewhat ??? when it was reported that the next one would again get closer to the original character. With the Samsung battery, I think it may work out well if that proves to be the case. Looks like the improvement and FW ride with the DX90 is turning out to be a smooth one.
Edited by goodvibes - 6/26/14 at 2:44pm