Terrible product and even worse customer service
I bought a new FiiO K13 R2R for €319 and the experience has been extremely disappointing.
The unit had clearly audible hissing/noise with my IEMs and Sennheiser HD 490 Pro headphones. The same headphones work perfectly with other equipment, so I contacted the seller to resolve the issue.
On top of the audio problem, I discovered that the power connector was installed in the opposite orientation compared with the product photos. Seller acknowledged this and offered to correct it.
Instead of accepting a return and providing a refund, they insisted on repairing the unit. I had purchased a new €319 product, not a defective unit requiring repair immediately after delivery.
I returned the product to them, but they refused to provide a return shipping label, so I had to pay another €37 myself to return their defective product.
I asked for a full refund of €319 plus reimbursement of the €37 return shipping cost. I even offered alternative solutions, including store credit or a brand-new replacement unit. Despite giving them multiple opportunities to resolve the situation, they refused to provide a satisfactory solution and then stopped responding.
The fact that they cannot reproduce the hissing with their own headphones does not change the fact that the product does not work correctly in my setup, and it certainly does not explain away the factory assembly issue they acknowledged.
For me, this has been a €319 purchase followed by unnecessary hassle, €37 additional shipping costs, a defective/incorrectly assembled product, and extremely disappointing customer service.
I would strongly recommend thinking twice before ordering them. My experience with their handling of a defective product and return has been extremely poor.