Audiophilepure

https://www.hifichoice.com/content/dan-clark-audio-aeon-2-closed

With its 2m cable and neat folding action for easy storage, it would appear that the Aeon 2 Closed is best suited to listening to music on the move and its comfortable earpads and lightweight design will certainly make your journey a congenial one. For those that like their lower frequencies, the impressive bass extension is a real boon although the treble could do with being a touch more extended. Having said that, the soundstage is spacious and insightful, meaning that at the price this deserves to be on your audition list.

https://6moons.com/audioreview_articles/podcast-review-of-mark-levinson-n5909/

Mind you, your portable amplifier will need to pack some punch as most DAPs won’t be ideal; but pair them with a Chord Hugo 2 or iFi Diablo and you’ll be rewarded in spades! With comfort levels that allow me to use them for literally hours (compared to roughly 90 minutes for the full-sized AB1266 Phi TC headphones), the Diana TC fire on all cylinders with regards to both comfort and world-class quality of construction. Their neutral tonality with speaker-like bass quality make them a no-brainer high recommendation for me as regardless of the genre of music that I threw at them, I always came away with a large smile on my face. You simply need to give these headphones a serious audition. Their price point might be too much for your budget ($4495 USD), but boy oh boy, your ears still need to hear them and you need to hear just how BIG and clear these small headphones sound!