Just received my new pair of UM3X's. I have been using the Shure SE425's which are a bit bass light and analytical. I was looking for something a little fuller sounding. I have Triple Fi's which sounded nice but are about the worst fitting IEM's I have tried.
So, I popped the UM3X's into my ears and was very disappointed. Where was the clarity? Kind of sounded veiled and muddy to me. I tried all the supplied tips and although they altered the sound a bit compared to the Complys, It still sounded rather dull. The SE425's seem much clearer in the mids and highs, most likely as a result of being light on bass. I was kind of trying to find something as clear with better bass.
I was about to give up but decided to try one more thing. I de-cored some Shure Olives and inserted the Sony Hybrids over these. Eureka! I found what I was looking for. The guitars and voices now have more brightness that I was looking for. The leading edges of notes were sharper and clearer. The separation and soundstage everyone talks about finally made itself known. Before these tips, not good. I know I could have EQ'd them but I REALLY HATE using EQ. I prefer to find and IEM that sounds great with no EQ.
So I guess the SE425's are going back. They do have really nice forward mids and great detail but the lack of bass made rock and metal sound a bit too tame. They are really nice for vocals, acoustic music and classical. Not so much for rock & metal.
Hope this is the end of my quest. It's gotten pretty expensive to say the least!
+3-4db at 10,000Hz really does bring them to life,, but I'm wondering what you mean when you say you de-cored the shures and put sony hybrids over them? Is there another thread?
I've been using Medium Shure olives for ages and finally got around to trying the Smalls, since the Mediums didn't quite fit.
Now I have a perfect seal, but the bass has become overpowering and muddied the rest of the sound slightly and it's taken the delicious crispness from the highs, even with +4dB EQ'd in.