Marv, that 7k peak is scary, to be sure, but the foothill at 3500 has the potential to be equally problematic.  Second harmonic of the second octave above middle C? Yikes.

I may listen to these someday just out of idle curiosity, but that FR plot makes it hard for me to imagine myself liking them.

Why do people with bad ears take publish measurements?
And what's going on with JHA? Different dudes every time at the tables.

Here are the measurements from HF without the coupler artifact.

Yeah, that's the one. Here's a bigger version:


This is the universal ARK03 version. The Seeko measurements are from a customized version, so it's probable that they couldn't get the right depth of fit when testing it.

I don't love the Roxanne; even without talking about the treble, it has too much bass even at the lowest setting (more than the JH13FP in a direct A/B). However, the treble definitely isn't as peaky as how it looks in the Seeko graphs. In fact, I found the Roxanne less strident than directly compared to the JH13FP. This is as close to an apples-to-apples comparison as the JH13FP was a demo and the Roxanne was the universal ARK03 version. From a technical standpoint, the SWFK drivers definitely exhibit a transient peak between 5-7k (depending on how far it's placed relative to your eardrum and of course the tubing diameter as well as any horn effects). If you do a CSD or burst decay, that peak will look like ringing, but the time course is fairly transient.

FR-wise, it's your classic V-shaped response. I was surprised that Jerry shifted the canal resonance peak to 3k rather than keeping it at 2.5-2.7k; I've had discussions with people that perhaps it's to appeal to the broader Asian market, which tends to have more of this free-field inspired equalization of tuning.

Anyway, that's about all the time I have for now. The Roxy isn't crap, but it's overrated for sure.

For $2000 less, someone would have to pay you to use the IEM... 

Allow me to slot in my impressions:

Roxanne (Universal) vs JH13Pro (Demo):

Roxanne has this kinda weird hi-sound, like for eg. the hi-hat sounds too splashy compared to JH13Pro, which is to me an alright quantity. The bass is weird too, like felt smaller sounding yet not so tight. The stage has somehow widened because every instrument sounds "smaller" to my ears. 13 sounds rather clean and every instrument is clearly in place. Even the vocals have good breathing sound which i like very much.

The store advertised it as the Rock star IEM. I guess YMMV.