The M001 model by HZSOUND is, as it seems, a rebranded and slightly redesigned (specifically the Y-split and the plug and the added cinch) version of Winintone RG-EB601. However, they also modified the sound signature a bit and solved RG-EB601's biggest issue - overemphasized peaks in the highs. M001's peaks are more subtle which greatly limits most instances of sibilance!
Just as I said about RG-EB601, these earphones are both well-built and premium-looking, and are also good-sounding. The sub-bass is pounding and the mid-bass is thick and full. The mids are crisp, and the highs only marginally sharp. The loudness is high even on low-power sources.
This review focuses on the silver filters, because the black filters sound pathetic.
Sound signature: V-shaped
The filters included with KZ ED9 can also be used with these earphones for additional sound signatures.
The filters included with KZ GRcannot be used with these earphones, but you can use the filters included with these earphones with KZ GR.
With the included tips, you might have to push these earphones deeper than you usually would. consider trying different, preferable wide-bore tips for a better seal and some extra detail in the highs. Overall, these earphones are very comfortable and there's nothing wrong with their shape or weight.
Lows / Bass
The bass is very deep, precise and impactful. It doesn't get distorted on higher volumes, and you can even feel slight vibration when there's deep sub-bass content playing. It's like having a night-club in your ears, amazing.
Mids / Vocals
The mids are clear, loud and tonally precise. However, they are pushed back just a tiny bit and there could be a bit of sibilance on above-medium volumes. These are very normal for V-shaped earphones and the impressive tonal accuracy is much more imporant as far as I'm concerned.
Highs / Treble
The highs are sharp and very enjoyable, their peaks are quite noticeable and there might be slight sibilance now and then. These earphones are some of the best V-shaped earphones on the market, if that's your thing. Very energetic highs with a huge fun-factor.