Dali Helicon 400 or Acoustic Zen Adagio?

Dcstep, it sounds very much like this speaker doesnt suit your needs and equipment after 5 amps! I must admit I havent seen this issue in my experience with them, but after 5 amps, is it time to switch to a different speaker?

Thanks Mike. I'm using the Vienna Acoustic Beethoven Baby Grand which does everything I need for my current room.

Dave

Sounds like you have a wonderful set up and great speakers. I havent heard the Baby Grands myself.
I listened tonight to some of my test classical tracks eg Prokofiev's Romeo and Juliet and Schubert's 9th, and specifically listened to the deep base harmonics/tonality, and I am still impressed. Must be my set up and room etc. The speakers I listened to before buying the Helicons included Thiel, Revel, Triangle, Dynaudio, Focal, B&W, Elac, Sonus Faber...that i can remember. I also listened to some extreme high end speakers. It took me ages. It is so hard to find what works well for your taste, your equipment, your room, and last (and definitely least), your budget. I am extremely fussy.
Sounds like you are too :-) so if yours are doing it for you already, why change? You are winning! I rare thing in this game in my books.

Mike, this issue that I experienced was in very low bass, below string orchestra levels typically. So it was synthesizers playing below the five-string electric bass range. I only ran into it on some of my light jazz albums. Also, you if you heard it you might not know it was limited, because there's a strong signal there, but it just doesn't show it's full character. You have to hear it on another speaker and then you'll realize your missing it.

My guess is that well under 10% of my CD/LP collection would expose the issue. So, your odds are pretty good that it will NOT interfere with your enjoyment. The mids and particularly the highs near the top of the heap with the DALIs, IME.

Dcstep, this is not intended as some sort of challenge, but perhaps you're asking the Helicons to reproduce sounds they're not really designed to reproduce. Do you know the frequency you're focusing on?

If that frequency range is especially important to anyone, then unless they have a true full-range speaker, the would likely be well served by adding a subwoofer.

I too have been impressed with the Helicon 400s from top to bottom, though perhaps not quite bottom bottom...