Pros:
1. the build quality of the wire is really good
2. Maybe marginal improvement in sound quality. I am not an audiophile but i can't notice a huge difference in sound quality

Cons:
1. No mic
2. Really uncomfortable as it doesn't have a good support for over the ear.

Overall, save your money and maybe invest in a better IEM.

The Cables are good and is better than the ones that come with BLON 03, but the cables lack mic which is a big downside. Since my BLON 03 cables got damaged while changing it is a huge downside for not having mic, considering the WFH situation for attending meetings and calls.

Out of the box, I have used Blon 4 cable bought together with the Blon Bl 03. Did not use the stock cable so, I cannot compare how different the sonic performance is. I do find the 4 core wiring is pretty smooth and comfortable wearing with Blons. Comfort wise it is better than stock KZ ZSN Pro X wiring. Although the latter is pretty sturdy and less tangling. Overall, I am happy with this product.

Bought these cables to upgrade from the standard cable. The audio experience just changed. All the small details in the audio just shone through.

I highly recommend these to anyone using their blons with the standard cables. It's a much needed upgrade.

The cable's built quality is decent, but boosts the treble and low end, and the details are not that prominent as in the in-box Cables provided by BLON bl03 ( used with Astell & Kern Xb10 ) used with Poweramp. It is abit more bass oriented and doesn't do justice to the details that otherwise the in-box cables provide and even the packaging for these were kindof off throwing. If you want to test the cables out, skip out on the 3.5mm and go for 2.5mm as the earlier positive reviews seem to be based on purchase of the 2:5mm version.

First of all kudos to headphone zone for delivering this product to me in less than a day. I was happy with my Blon BL-03 and Astell & Kern XB10 out of the box, but only after a few weeks the right connector on the cable started going loose necessitating a cable replacement.
The build quality of these is far better than the stock cables that come in the box. Its a lot less plasticky feeling and also has sturdy connectors. The cable is considerably thicker too and feels less fragile than the stock ones. The lack of a mic doesn't really bother me as I use my Galaxy Buds for calls and even in an emergency where those aren't around I can use the mic present in the XB10. These cables do provide better sound in my opinion and way less noise when comparing to the stock cables.
My only gripe with these are that I think the pricing is a little steep as the BL-03s are available at 1,990 INR and buying a 800 INR cable for them seems a bit expensive. I think 500-600INR could be a better price point for this product.
Overall pretty satisfied and happy with my purchase.

This blon's have really short ear canal stem due to which they don't go really deep and don't fit snug in your ear which can cause poor performance specially in bass, So before ordering consider the eartip upgrade as well because you'll definitely need one. I'll recommend those Spinfit's because of their long size and comfy snug fit.