Thoughts after listening to the Stealth, CA-1a, and Utopia over the weekend -
How is the Stealth even better than I remember? The bass is so satisfying and hard-hitting, the soundstage and imaging are beautiful, details and textures are plentiful. Like the first time I owned it, I have zero complaints about the Stealth not having dynamics. It's as dynamic and punchy as my '22 Utopia.
The Raal CA-1a is more spacey, it makes music sound like it's coming from further away from you. At the same time, it presents an impressive amount of detail and resolution in the treble region. The bass also extends linearly very low (with Mitch filters engaged). The treble does tend to get slightly more piercing and edge of sibilant for me at louder volumes though compared to Stealth and Utopia.
One complaint I have with CA-1a is that it doesn't reach out and touch you. It's lacking that physical impact that I get from both Stealth and Utopia. Stealth and Utopia also beat it at imaging. They both provide pin-point imaging and instruments are distinctly etched out, whereas the CA-1a has a bit more diffuse imaging in its bigger soundstage.
They actually make very good complimentary headphones. The CA-1a is great for music that needs a bit open stage, like classical or ambient, live music, etc. But, the Stealth and Utopia both provide a more intimacy and palpability that suits most other types of music.