I have Zen Dac + Sundara and got this cable to improve the power output. Cable did help get balanced output from Zen Dac. Sound quality did not improve a lot but I could notice tiny improvement with details (not because of cable and mainly because Zen Dac balanced amplification). In summary, If you are happy with power you are getting, I would say not go for this cable. I went for this because I wanted more headroom for volume. Also, I could plug-in another headphone to Zen DAC now.
Price of this cable is very costly, considering this is made in India. Similar cables in US are ~$50. This is more that twice than other countries market. I guess Headphone zone is keeping higher profit margins here. Purchased it anyway since I did not have any other option. My advice is the save the money for better headphone (or Dac if you already have Ananda or Arya) because this cable adds diminishing return.

I bought 2.5mm balanced cable dor sundara to pair with shanling ua2.
Unfortunately one of the ends of cable is not working. Return is initiated. But disappointed with this.

I think the fair price should be half of what it costs it's just too expensive. Yes it does improve the quality of the sound, since it is a balanced cable it obviously adds more dynamics and you get better seperation but it also adds touch of clarity and just improves overall sound by a bit. The build quality of the cable is what I'm concerned about it honestly feels cheap doesn't feel premium doesn't feel like it'll last long time. It's very stiff, thin and not at all supple, I tried warming it up by hairdryer to see if it loosens a bit but it doesn't. It has absolutely terrible microphonics, everytime cable rubs and has contact with it induces microphonic noises. Overall I'd give it 3/5 stars, I don't have any issues with the sound infact it improves the quality of the sound but it's cheaply built and I don't think it'll even last two years so for that it should be priced at half of what it currently costs.

I badly wanted a balanced cable for my Hifiman Sundara and this seems to be the only available aftermarket cable. Its quality cannot be denied. Good stress relief at ends and braided, but its seriously overpriced. Periapt cables cost 40-50$ with a 15$ courier from USA still falls short of this price point. But, didn't want to import as I wasn't sure about the customs. I think ₹6000 is the right price but, ₹9000 is just too much

Good dynamics with expansive yet cohesive soundstage. Better than the stock cable of Sundara in every respect. Although the stock cable of Ananda is better in terms of tonal refinement.

Brought it for my arya,feels better compared to original 6.5mm cable, paired with my Fiio k3 DAC supported this balanced 2.5mm ending cable,gave 30% improvement in sound resolution compared to single ended 3.5mm out.
Got delivered in 2 days.

Headphone Zone - Balanced Cable for HiFiMAN Sundara/ Arya/ Ananda/ HE400i