Shure KSE1500 Impressions
Drove out to do a quick demo of this IEM today - much thanks to kdphan for the hook-up! The KSE1500 is quite the interesting IEM. It uses an electrostatic driver (something traditionally reserved for full-size headphones) and requires a separate, transformer pack to provide the necessary juice for the IEM. Listening was done with both a Sony WM1Z and iBasso DX160.
First thing that struck me: This thing is bright. I tried using silicon tips with it very briefly, 10/10 would not recommend. Foam is the way to go. It's really difficult to describe what part of the treble, specifically, is bright though. There's something of a resonance to the way treble instruments decay; triangles, in particular, have a shimmer to them that gets fatiguing quickly. This same quality, to a lesser extent, seems to extend to the upper-midrange with female vocalists sounding, well, simply not quite natural. Thankfully, the lower midrange seems more normal, and bass is a good deal above neutral. It's no DD substitute for bass, particularly when it comes to sheer slam and texture, but the KSE1500's bass is nimble with good extension, a step ahead of BA bass in my book. Imaging is unfortunately subpar to my ears with what sounds like a notable absence of center image incisiveness; staging is likewise fairly sonic-walled.
So, the KSE1500 is finicky, niche by design, and there are clearly some tonal quirks at hand. What's the catch, you ask?
Well, the KSE1500 just might be the most resolving IEM I've heard. Microdynamic ability is present in spades; mind you, this is something that I think most IEMs, even many at the flagship level, simply lack. The qdc Anole VX, the EE Odin, hell, name any other IEM, and I don't think it has anything on the KSE1500 here. All the little details in a track that are there, but sort of glossed over even on stuff like the U12t and Erlkonig - yeah, they're suddenly there, just popping at you. I'm reminded of the first time I tried the HD800S, and I don't think it would be an understatement to say that the KSE1500 can play ball with most headphones in this regard. The macrodynamic ability and positional incision of the KSE1500 are well-above average too. Some have described the electrostatic driver transients as "ethereal" though, and hmm, I'm not so sure. Certainly very quick and clean to say the least, but the KSE1500's transient response also sounds different from memory to the only other electrostatic I've heard, the HE1 (which I also would not describe as ethereal, funnily enough). Maybe I just don't have a good frame of reference, but...
My conclusion after a mere hour or so of listening? The KSE1500 is an IEM that won't be for everyone - I don't think I can personally recommend it - but it's one that should be on your demo shortlist if only for the unique experience it delivers; words don't do justice the sheer amount of detail this IEM possesses. Needless to say there's something beautiful, elegant about TOTL headphone-comparable performance minimized into such a small package.