That is so much true, preferences are important.
I found new love towards the D9200, after striking a balance with custom ear pads (again). So resolving (vs upstream) and musical, not only across the whole frequency range, but in spatial and temporal domains as well, while maintaining good harmonic richness and balance.
Speaking about the stock D9200 and personal preferences, I tested extensively the Utopia and especially the Stellia (my favorite Focal, and closed), and also the Clear and the Clear Mg against the D9200 and let's say it's a personal preference, but I could not convince myself permanently choosing any of the Focal over the D9200 for the genres I am listening to.
I think that is OK, as is fine to prefer any of the Focal (or other metallic drivers) over the biocellulose family (Denon, Fostex, Drop, ZMF).
Besides, the Focal pads are excellent and well optimized, hard to improve, whereas the D9200 pads were quite easy to improve, lifting the D9200 into a higher category IMHO (nearly e-stat level, and with better bass slam). That, and the flexibility and headroom of the D9200 when EQ'ing, might flip the balance. IMHO the D9200 has surprisingly big reserves for further optimization or customization.
Things might be different if Focal would decide to make a Stellia with biocellulose drivers, which they would be perfectly capable of doing, but that likely won't happen anytime soon
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