Joe Curcio
Head-Fier
After reading that review, I might have to try and pick up some i4s. I ain’t paying $2400 though. I might be willing to pay half that though. I’ll shop around and look for some like new.
I purchased the 3's (first time Audeze owner) from Amazon so I would have an out just in case they wouldn't work. Found them to clearly & easily better any of the IEM's in my stable (Andro, FH7, 846, Fearless S8F, +more). So, I became curious about the delta between the i4's and the 20's so I purchased a used pair of each. The i3's are absolutely great but closer to the 20's (if you have 20's, update the cipher cable and be done) but the 4's are better in every way. You feel like you're "there" with the 3's (and a bit less with the 20's) but the 4's are trans-formative. Every nuance of the event subtly presented without exaggeration. Staging matches my Stax 009's and 007's (using all tube direct drive amp). These are end game IEM's for me. Some reviewers note the i4's are less efficient than the 20's and i3's - this is true but it won't be a problem with most phone headphone sources. Finally - lots of reviewers complaining about sound leakage (for example public use) - my experience is that the leakage is there but really minimal - mostly high frequency content and most everyone wont notice (except perhaps on a night plane flight).
If you can find a used set of i4's ~ $1500, IMO, that's worth the difference. If you never heard the i4's you'll be thrilled with the 3's (and 20's). BTW - All of these comments are based on using the _latest_ version of the cipher cable (V2 - with the V2 profile). As it tuned out, my used i4's came with a V2 cable that was flashed with the iSine (20's) profile (I have the test gear to perform accurate FR & THDN measurements). I contacted Chris @ Audeze and he flashed both cables to the latest profile - no charge - outstanding customer service. On all three (IMO),the V2 profile is a must have. BTW - the V2 cable provides diff (not single ended) amp output.