Bravo for your review. Short yet informative. Did I see correctly, are yours grey (Pro version?).

I found the Final e-tips to be inappropriate for the ZEN and regarding my preferred sound presentation. The Symbio W Peel fixed the treble « issue » you seem to experience. Then, yes, it’s also a question of comfort with any tips added to the equation. Still, at USD 10.- for 2 or 3 pairs depending on the models, playing with these Symbio tips sporting a slightly wider aperture might improve the treble and widening the stage a bit. It’s not a guarantee, but worth a try, I guess.

Finally, about your source and amplification, do you need to crank up the volume to get satisfaction with the ZEN or do you have some margin left?

I dare asking questions and adding remarks in this comment section, because I love my ZEN and It’s a pleasure to discuss how to improve the already fantastic tuning realized by Dunu.

Thanks for your review and the nice pictures

@F700 it's always a pleasure to discuss our individual impressions.
First, no, it is not the Zen Pro, it's the OG Zen. It may seem grey because of the photo angle, but it's actually black.

Second, I did try wide bore tips, namely, Azla Sednaearfit Light and Light Short. Unfortunately, while they did expand the stage a bit, the effect on the highs were not enough to reach my desired level of satisfaction.

Regarding source, yeah I did have to crank the volume up a bit compared to my tribrid, but there were still plenty of margin left. It isn't as insanely power hungry as some of my other set, namely, the ION-2S. That requires the most crank up of volume among all my others.

Един съвет от мен - когато анализирате IEM с голяма динамика, трябва да включите много динамични песни (Progressive metal, Progressive death metal и т.н.) Metallica не е мярка за динамика в музиката!

One piece of advice from me - when analyzing IEMs with great dynamics you should include a lot of dynamic songs (Progressive metal, Progressive death metal, etc. Metallica is not a measure of dynamism in music!

@vasix that is an interesting take. I will think about it. Disturbed will be a nice choice, do you think?

No. Progressive metal or progressive death metal. Search groups on the Internet.

This can serve as a guide for dynamic music with fast transitions! I hope I have been useful to you.

I will look this up.

@vasix you have my heartiest thanks for suggesting this track. Loving this album from the very start!

I wonder will Zen Pro solve the issues in the upper register?! I suspect so... it'll be interesting. Great review.

Well, apparently, from the graph Precogvision posted, they did boost the upper mids a bit.

If not mistaken, some would have liked less of them, but more extension and more clarity in the treble. Without tips, cable and source matching, the upper mids might be a bit agressive and shouty, depending on the recording. It’s my experience at least in their stock delivery, hence my recommendation for Kimber Cable, Symbio W Peel and L&P W2. Ymmv