Ah, late to the party, but my jvc hafx40's arrived in the mail today! Was very excited! I agree with the consensus on these iems, that they're a quite a bit sibilant out of the box, but extremely detailed and have a deep reaching, clean bass. Have had only 10 hours of burn in so far. Got really impatient, so mucked around with tips, and found that for me, shoving a large pair of monster triple flanges over the stock foamies upped bass impact a bit and reduced the sibilance! Only a quick/temporary fix, will continue to burn these in. Loving them more than my dba02mkII's, at least until they get their channel imbalance fixed.
Dsnuts, I would not be surprised if you were active making budget/giant killer discoveries on other product forums, like car or kitchen appliance forums :rolleyes: Thank you for reporting this gem to us !