Went to Fry's Electronics and BOOM!!! Harmon-Kardon's EP710, EP720, and EP730 were on sale and guess what? They use the same technology Etymotic Earphones use!!! What is up with Etymotic licensing their technology to other people anyway? Why is Etymotic doing this? EP710: $30-$40...

I've seen a good deal of threads that talk about "missing bass", "muddy sound", whatever I can name it. I would like to try to help some newbies get over with posting pointless threads, and to set the record straight in some corners. Why is the sound muddy? There could be many factors why...