Well it is more speculation than fact but there are so many clues that they are AT drivers inside them. The biggest being the fact that they have Audio Technicas sound signature. I own 4 Audio Technica headphones and all of them have a similar sound signature. The M50 the AD700. The WS55.. A900X.. And is no different from the Isurus earphones..
It is unmistakeable..ATs house sounds is as distinct as it gets. The best way to describe the Isurus sound is they sound like the A700, A900 headphones in an iem and even the M50 to a certain degree.. The emphasis on the high notes the smooth mids and full dynamic bass..Not too many manufactures has just as much emphasis on the highs as much as the bass end. That is AT. Then you add to the fact that the CKM77 and CKM99 uses very similar sized drivers if not the same exact drivers in a housing that looks exactly the same.
If somehow AT tweeked the sound to be something different than this speculation would not happen but I am certain these drivers are indeed from AT that was made for Thermaltake. Anyone that has any of the AT headphones or has a AT earphone will immediately know what I am talking about if they heard the Isurus.. Also AT is known to outsource their headphones to other companies. Denon HP1000 and Allen and Heath Xone 53s are both made by Audio Techinica.. They both use the same drivers that is in Audio Technicas own Pro700 Dj Headphones for example.
Let me put it this way. It can't be anyone else. The only other manufacture that has a similar house sound is Pioneer but as far as I know Pioneer don't have iems that look anything close to what the Isurus looks like.


This is an example of AT outsourcing their drivers. Same drivers and sound on all 3.


Edited by Dsnuts - 12/27/11 at 11:29am