Just received mine... tips and stock cable are useless, as usual. Nozzles are short and stubby, tips can't reach my ear.
I replaced the stock eartips with those T400 foams you buy in bulk from AliExpress. Blue ones.
Spinfits, my usual go-to were a no-go. They didn't compensate enough for the short nozzle / lack of reach. Tried CP100 M and they almost fell out of my ears, like the default tips. So I switched to CP100 L, but they were just a bigger, mushier version of the CP100 M obviously, and didn't extend forward enough.
I bet those red angular foams that are very long would be a good choice here, forget the name.
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I haven't listened much yet, but suspect Nimweth is right about these.
It's not as bassy or slow as the BL-03. It's comparatively neutral, but not neutral. Still bassy. Like still quite a bassline in mainstream rock/alternative tracks.
I've been listening to the CA16 a lot in the past few days, and this is like a cross between the two modes I was experimenting with. It has the soft/warm/bassy tuning similar to stock CA16, but with the stronger percussion and beats you get from using proper CP800 tips on the CA16.
Anyway, the reason I bring up CA16 is that they're both painless to listen to in relatively stock configuration. BL-01 is stronger in the treble than stock CA16. But no peaks are bothering me, no shoutiness. It's a warm, bassy, lofi sound that isn't going to trouble you.
BL-01 is grainer, muddier, coarser, and not as airy as CA16. More confined soundstage. Sound is "in your head" in mainstream tracks, and not much beyond it. Taller than expected, and some East/West beyond the ears.
Overall, it's a coherent sound that doesn't come across as weird or unintentional. Just limited in resolution and soundstage.
I've got the silver one, and it's really bright and shiny. Will probably look good with a blue/silver cable. I might post a photo of the results.