In my own words, in terms of the isolation factor of the CK100Pro's would be the least on my book of worries, they actually do isolate just as well as CK10/CK100, I would not go that far out and say they have very much more superior isolation compared to CK100, (I have owned the CK100's for quite sometime before I managed to acquire my pair of CK100PRO's, I still have them with me now and just earlier this yr I have also got my hands on a brand new pair of CK10's so I have tested these myself with various tips so my experience was certainly not just based off my memory) but these are certainly not any weaker than CK10/CK100 in terms of isolation strictly. In terms of ergonomics/overall fit, there is still no denial to me as far as my own experience goes the CK10 and CK100's would probably bode much easily with almost anyone's ear shapes/canals, because you can very easily wear it normally straight down (compared to over-the-ear style for CK100Pro's) and still get a pretty good deep insertion fit with these previous 2 predecessor models.
With the CK100Pro's, because of their enclosure housings being made substantially larger compared to the other previous model designs, (I actually have my own suspicions partially their acoustic horn design also plays a hand in its overall design, as Audio-technica shares the same concept as Suyama FitEars, since to my own knowledge the To Go! 334 are not exactly very small either in terms of its enclosure housings) some people may have a slight problem with it's fitting during their initial experience, and speaking for myself since I have pretty small ear canals although the CK100Pro's do not go in as deep as far as my own experience with CK10/CK100 goes, in terms of isolation factor as long as I stick with triple-flange tips (I personally use Monster and Etymotics brands for them), I can get a pretty excellent seal with them and its isolation factor is definitely comparable to my CK10/CK100 or even the Etymotics ER-4 as far as my own experience goes.
I do have my own impressions thread over in another Singaporean forum called HardwareZone, and one of my fellow countrymate Kentgh has just shared his aftermarket cables impressions with me not too long ago as he had just upgraded his cables. I will just cut and paste his own impressions here so you guys may read it for yourself easily.
Null Audio Studio is a company based off Singapore, but they do have a Facebook page and official webstore site so I'm quite sure they do cater to overseas customers as well.
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