Disclaimer: When ordering from Mouser i dont Recommend Using UPS Ground, they use mail innovations and its a horrible Process Where UPS picks up the package then it exchanges with mail innovations then with the usps..dont quote me on that but it works somewhat like that, and if you reading it makes you think it sucks, try ordering and awaiting arrival.
so i decided to go with Brown for my E5c's and for my E4c i decided to go with grey.
first i did the E4c, initial impression was WOW, i left the right alone and put the left grey in and off bat i noticed a HUGE difference, upper mid and highs clarity is insane on the comparison, the iem with the grey filter was so much clearer in clarity across the spectrum, mids were much cleaner same with the highs, mids were slightly brought forward, and the high extension was phenomenal,there was a clarity to the upper mids and highs that was not there on the right side it was congested and muffled....grey filter completely did away with all that and brought a much more focused and detailed sound. now take this into consideration its only a single dynamic micro driver setup, but with just the change of the filter it was enough to impress me, and i mean its not like i have alot of high end iems just the se535,w4r, and stuff like that, but DAMN....i will note that some might not like the grey filter as its VERY detailed, and it might be TOO bright for some..for me i feel its just right, but others who want a less detailed experience.
i had another pair of E4c's come in the black ones (the colour doesnt make a difference, one set is black one set is white, white have the grey's & the black have the Brown's)
this pairs nozzles werent as easy to extract and had a hell on a time, i ended up slightly pushing in the nozzle screen, i hear no difference between the 2 so i think all is good.
so again on my impressions wow again came to mind, same iem's different nozzle filters but a different beast all together. the brown acoustic filters are much more on the neutral side with emphasis on both mid bass and sub bass. these filters give the bass more punch and the sub bass goes alot lower than that of the stock acoustic filters....sub bass has alot more depth. i gave them a good listen before giving my opinions, i felt like even though the bass was emphasized the mids and highs were slightly pushed back again, to give the browns a definitive definition, mid bass/sub bass with a well rounded Emphasis on the complete tonality of the freq spectrum, its full and lively and fun with out overcrowding the other freq's but again bass emaphasized.
Please Note: this review is for the grey and brown filters. and the differences they made with the shure e4c, from what ive read alot of what iv expierenced with the filters are what other expierence with the filters in the se535. but the reviews are for the filters not the iem's.
