Pros: Detailed highs
Cons: Tiny soundstage, Poor Isolation/fit
These IEMs were a surprise to me, after all the reviews I read I am still not sure if my pair is defective, but so far nothing seems to show that.
I was extremely disappointed with the 8320. Highs are detailed without being sibilant but I never use mine due to:
-Soundstage is tiny. They sound flat and distant. Sound appeats to come from inside your head, cold and not involving.
-Bass is acceptable but depends on good fit.
-Format is not very good. Over-the-ears are my favorite but their format does not allow for a deep insertions/good isolation, they are not particularly comfortable. Also despite the format, it is easier to let the cable to down instead of over-the-ear.
-Cable is very thin and microphonic.
-Build quality is low, but perhaps acceptable for the cost.
Problems 2 and 3 can be mitigated with better tips, probably triflanges. However I could never get past #1. To me they sound as if they are worth indeed no more than $10.
Other headphones I own/compare to:
IEM: Sony E888, Fischer Audio Eterna, Mylar X3, RE0
Other: Sennheiser HD590, Sony MDR-CD3000, Koss PortaPro.