Quite interesting. Where did you buy the Castor?

What a shame! They make silly advertisements comparing their products with others, but how can we trust that when they change the IEM's driver in the middle? It would be better to find other reliable manufacturers, like Attri, Kefine, or TRN.

I agree. Last week, I compared some KZ/CCA IEMs. The Castor bass is great, but I noticed its bass is a bit unnatural compared to the Trio and Rhapsody. Its treble is what makes it super fun but harsh at the same time. The Trio has more stable bass and well-controlled treble.

I've listened to both Rhapsody and Trio. Trio has a more spacious sound, but not much difference. 🤔 It'd be interesting to hear what other experts think.

CCA polaris is singe dd iem with dual cavity structure. Someone said it's good for female vocal.

Trio was my main iem, and I ordered DQ6s on AliExpress because it was only $10. I was surprised by its sound. Although Trio has punch and dynamics, DQ6s have more clarity and detail. It doesn't matter if it has false drivers or not; I can't believe I got this high quality iem for only $10.