Purchased as a replacement for the default Sennheiser IE300 cable, that was starting to cause issues. My first impressions after the first 2 weeks of daily use are very positive so far.

Iinital installation was a bit scary, because the connectors require a lot more force to be pushed in compared to the default ones.

It also came with a nice bag and a ownership card

I bought this cable with the Sennheiser connections, because I have a Sennheiser IE600 IEM. My main priority with this purchase was a good fit with my IE600, because the IEM uses a slightly different MMCX connector. I have never spent this much money on a cable before, but options are limited for the IE600, so I decided to take the plunge.

The Ethos cable I received fits my IE600 perfectly. It is more snug than the original cable that was included by Sennheiser. If you are looking for an IE600 cable that fits, I can confirm that this one worked for me. I am giving this cable 5 stars because it does exactly what I bought it for.

Other things I can say is that the cable feels nice and thick, it does not tangle, and it is pleasing to handle. The white color is attractive.

Not cable-related, but Null audio sent the cable in a nice leatherette case. The leatherette case was inside of a nice embossed cardboard box. I now use the cardboard box to store my IE600s (perfect size). I use the leatherette case to store a different pair of earbuds. In other words, the packaging and unboxing was very nice.

For reference, here is exactly what I ordered:
1x Ethos Series MKVI Premium Upgrade Cable for Headphone | IEM for $0.00 USD each Headphone Connection: Sennheiser IE300/600/900
Stereo Connection: NL4 Rosegold 3.5

Genuinely one of the best cables I have used for the ie900. Originally had issues with treble peaks and just overall harsh treble for the ie900. Ethos VI completely fixed that for me, and added a tone of excitement to the pair.

Fantastic IEM cable, a great improvement for my Sennheiser IE 300's. Easy purchase and excellent customer service.

Thank you.

Beautiful cable. Support where very helpful as I wanted a custom 140cm cable for desk use. Beautiful sound & build quality. Highly recommend.

Great price point for a cable this is just better than the stock one. The ear hooks are more comfortable and adjustable, the cable is overall less microphonic and I feel it does give just the right life to the sound of your IEM. I ran into some issues that ended up being my IEM manufacturers fault but Null was ready to step in and send me a new cable. Great quality cable and company.