The dot is positive polarity, most monitors have positive polarity facing upwards as noted, however a few may have the polarities reversed.

not sure if this thread is still active but the answer to your questing is the drivers are Knowles.

How are you finding the durability of the cable exit, does it show any signs of being able to pull the cable out of the earphone?

This is a stunning post, so much effort going into, great stuff.   Could I make a suggestion, it would be nice if you could include the Y-Split in the photo of the earphone, it is always interesting to see how manufacturers implement them.    

this is obviously a new driver setup from knowles, it looks on paper very good, it has a very smooth response, will have to get my hands on one. 

You must be one of the first people I have heard being open about being prejudice on testing something by name, if you get my drift. I follow another thread here on testing 3 different cable qualities without knowing which is which and it makes interesting reading and then when the results came...

Quote: No worries, I never took it that you were doubting me I just thought it might be of interest to see more pictures.  It is strange why they have the vent, when you open up the ADDIEMS not only is the back covered by the crossover but the both drivers are encased in a rubber moulding...

   

Quote: I removed the crossover and neither of the drivers are vented  

This thread has some pictures of the ADDIEM drivers.   http://www.head-fi.org/forum/thread/545046/addiem-here-are-the-drivers-inside-pictures-of-them#post_7348620    

I have always been curious to what drivers were inside the ADDIEMS so I decided to take them apart.    They are definitely Knowles balanced armature but they are not standard off the shelf, they look like they have been created for Apple specifically. What is interesting is that they have...

Great stuff. What did you use for the acrylic?

Does anyone know if this exists and if so where it can be sourced.   Thanks

Ok you cable gurus can anyone help.   I about to start making a new cable for my earphones, I am ok with the connectors at both ends but I am unsure of the best material to use for the wiring and insulation, also where to find a Y-split.   My requirements are not the normal audio quality...