First impressions.
Really nice build, perfectly ergonomic - easy to get a fit for me.
Cable is really well built, personally I like the formable ear guides - understand others may not. Cable covering is microphonic though (one of the issues with cloth) - so going to depend on your activity, what you're wearing, and how you manage placement.
Connectors are brilliant. Very firm.
So far have tried Comply, Symbio, Shure Olive (stretched), and Sony Isolation (Sony Hybrid + foam inner). All of them gave me practically perfect fit. I like the Shure Olive and the Sony Hybrid the best. Comfortable. Brilliant seal.
Filters are interesting. Black and Blue have very heightened upper-mids and tend to get a little glarey or grainy for me. I can see why LZ used this tuning though. Doing it this way sets them above the bass, and masks the warmth to a certain extent. For people who like a cooler signature with more mid-range energy, the blue and black will likely be their preference. I just find them a little over-done. There is very little between the blue and the black. Blue is very slightly brighter. Blue and Black give a very V shaped sound.
Grey and Red are very different from Blue and Black and the upper mid-range (2-5 kHz) is the biggest difference. Where Blue and Black both rise to a big peak at 2 and 3.5 kHz, the Grey and Red instead have a shallow slope to a 3 kHz. Because the amplitude of the peak is lower, there is less masking, and overall these two sound a lot warmer, and the sub-bass is a lot more noticeable.
All 4 filters have an enhanced sub-bass presence, and all have a minor peak in the lower treble at 7 kHz which gives great definition to cymbals. The Blue and Black are too much for me personally, but the Red and Grey are really good. Both bass and treble extension is very good. Lower mids are a little recessed, but tonally things sound relaxed rather than excessively scooped.
My personal preference at this stage is the Red filter. Good balance overall - just with an enhanced mid-bass.
Will post graphs later.