I think the Andromeda would be an interesting comparison considering that they make use of similar concepts in their technology, moving towards chamber acoustics rather than tubing. Also the Andromeda being this "benchmark" of TOTLs nowadays.
The Dita (all of them) didn't really stand out to me a lot. Great bass yes, but tickled my sibilance range (the Brass being the worst). Also the tuning can be a little niche and not as "one size fits all" as the Andro.
Thanks! Once the U/A18 and Fourte demo sets reach my shores, I'll try to put out some curves.
I agree on the Ditas, theyre not the easiest to pair, and not the easiest on poorer recordings, but drive them well, and with great recordings, and they really sound big.
The andromeda and the Fourte actually have a slightly different approach, While they use resonating chambers, the Andromeda still uses normal BA drivers. The TIA drivers are very different. One thing about typical BA drivers is that, as the sound squeezes through a tiny aperture at the side of the BA, a certain amount of distortion happens. With the TIA drivers, the surface parallel to the armature is completely opened up, leading to a direct firing of the sound waves. The whole TIA driver is then placed in a particular resonance chamber to tune the sound, so in some ways somewhat similar concepts but in practice, not quite.
The Fourte to my ears, sounds at the very least just as open, if not more so than the Andromeda, imaging however is more precise. The bass is bigger, hits much, much harder and has a much bigger sub presence. The resolution of the Fourte is on another level as compared to the Andromeda as well. One thing that the Fourte does remarkably well, better than just about any earphone I've tried, (I find the Vega and the Dita Brass to do this very well too, the andromeda less so), is the physicality of the sound image. With the Andromeda, while imaging is precise, the sound doesn't have the same physical presence. When the vocals come on, I know its there, but i dont feel it being physically there. I don't know how to better describe it but that's one of the things that really defines a great earphone to me. Like most other BA earphones, the Andromeda also has to my ears a less dynamic sound, with a less impactful and snappy attack. I find most good dynamic earphones to do this better. Most people talk about impact only in the bass lines, but for me, listening to a lot of classical, I find the energy in the upper and mid registers, especially when the strings come on, to be lacking on most BA designs. This is one thing I love about the Dita Brass, on really energetic string passages, they just seem to explode out of thin air. The Fourte is one earphone which I have found to surpass the Brass on this aspect. Another is the KSE1500, but that's somewhat to be expected given the speed of electrostats.
Don't get me wrong, the Andromeda is one of my all time favourite earphones. I still use it all the time. But the Fourte is crazy. I really can't wait for more people to hear them!