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Thread Starter 

I came across this video on youtube


Basically the guy uses a $10 product which is some mold type thing used as earplugs, but sticks headphones in them while they sit in his ear and stiffen up.  Is this pretty legit?  I don't know much about custom iem's or anything, but I've heard custom significantly increases sound quality.


I'm curious to what everyone here thinks.  Discuss...