I'm not the greatest chart reader in the world, but I identify with Tyll's charts about the FR curve of the three 846 filters than what I am seeing on Headroom. Perhaps these charts are more similar than I think. Whatever the case, I clearly hear more midrange (particularly vocal region) warmth with the black filter (which would be obvious by design), but it doesn't look that way on Headroom's chart. I also think the black filter has better treble than the other two filters. Mind you, I do hear the peak in the white filter but it does not (IMO) contribute to a good sounding cymbal. The white and blue filter do have more sub-bass presence than the black filter.
Both the white and blue filters are a little frustrating in the vocal region (too laid back). That may be source related, but the 535 is warmer and more prominent (in the vocal region) with the same source (though the 535 seems smaller by volume level). Tyll's chart suggest the 535 is warmer than the 846, where as Headroom's chart blurs the distinction I actually think Headroom's chart comparing the three filters of the 846 is even off in the bass region.
OTOH, if Headroom's chart on the W4R is correct then that is an awesome super-earphone that I want immediately. The W4 I had resembles Tyll's chart for the W4R. I guess if the IE800 can have such a huge jump in sub-bass (with a new version with the same name) then perhaps the W4R did something similar across the entire spectrum. I'm not going to rush out to find out. It's probably like Tyll's chart suggests and not Headroom's..
But anyway, back to the 846. I wish Shure would increase the variety of filters for even more sound choices. How about a 535-like filter with the warmer mids and a little more sub-bass than the black filter (and just a little more treble too)? Right now, the black filter is my preferred of the three.
Edited by truckdriver - 11/25/13 at 1:59pm